JP2018053475A - Coating treatment method for coating channel of concrete structure and coating cylinder therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently carry out a coating treatment on the inner circumferential face of a channel for enabling the control of liquid leakage resulting from cracks or the like formed on the inner circumferential face of the channel caused by a rotary cutting force, vibration or the like at a time of boring and of the progress of corrosion beginning from a cut end section of a reinforcing-bar having been cut.SOLUTION: A mounting step of mounting a coating cylinder 4 capable of covering the inner circumferential face 1a of a channel 1 onto an insertion device attached to the outer face Wa of a concrete structure W in a state of facing the channel 1 formed to penetrate the concrete structure W by a boring device, an insertion step of inserting the coating cylinder 4 mounted on the insertion device into the channel 1 in an uninterrupted flow state, a sealing step of sealing a sealing area L4 defined between the outer circumferential face 4a of the inserted coating cylinder 4 and the inner circumferential face 1a of the channel 1 using a sealing means 6, and a removing step of removing the insertion device, are carried out.SELECTED DRAWING: Figure 7

Description

  The present invention is, for example, a structure made of concrete in an undisturbed state, such as pipe construction in existing reservoirs such as reinforced concrete clean water basins and drainage basins, or pipe construction associated with the new construction of reinforced concrete reservoirs. The present invention relates to a processing technique for a flow path formed through a body with a piercing device.

As a technique for perforating a flow path in a continuous flow state in a concrete structure, for example, there is a method for perforating a concrete structure disclosed in Patent Document 1. In this drilling method, a gate valve is attached to a planned drilling portion on the outer surface of a concrete structure through a short pipe having an inner diameter through which a cylindrical cutter of the drilling device can be withdrawn and retracted, and the drilling device is attached to the gate valve. Then, the gate valve is operated to open, and the cylindrical cutter of the perforating device is fed through the inside of the gate valve and the short pipe, thereby forming a flow path through the planned drilling portion of the concrete structure.
After drilling, the cylindrical cutter of the punching device is moved back to the initial standby position through the inside of the short pipe and the gate valve, and after closing the gate valve, the punching device is removed from the gate valve. After that, branch piping work is performed on the gate valve.

JP, 2014-218036, A

In the above-described drilling method, since the drilling port of the structure drilled by the cylindrical cutter of the drilling device is used as a flow path as it is, the flow path of the structure is changed by the rotational cutting force or vibration of the cylindrical cutter at the time of drilling. When a crack or the like is generated on the inner peripheral surface, there is a disadvantage that the fluid leaks to the outer surface side of the structure through the crack or the like.
Furthermore, when a part of the reinforcing bar arranged in the concrete structure is located on the drilling path of the cylindrical cutter, the cut end face of the cut reinforcing bar is exposed to the flow path, so that the cutting reinforcing bar is There is an inconvenience that corrosion proceeds from the cut end face by contact with the fluid.

  In view of this situation, the main problem of the present invention is to suppress fluid leakage due to cracks in the inner peripheral surface of the flow path caused by rotational cutting force or vibration during drilling and corrosion progression from the cut end surface of the cut reinforcing bar. In addition, the present invention is to provide a flow path coating treatment method for a concrete structure that can efficiently perform the coating process on the inner peripheral surface of the flow path for that purpose, and a coated cylinder used for the method.

A first characteristic configuration according to the present invention is a flow path covering method for a concrete structure in which an inner peripheral surface of a flow path that is formed through a perforating device in a concrete structure is covered in an uninterrupted state. And
A mounting step of mounting a covering cylinder capable of covering the inner peripheral surface of the flow path to an insertion device attached to the outer surface side of the structure in a state of facing the flow path;
An insertion step of inserting the covering cylinder of the insertion device into the flow path in an uninterrupted flow state;
A sealing process step of sealing the set sealing region between the outer peripheral surface of the inserted coated cylinder and the inner peripheral surface of the flow path with a sealing means;
A removal step of removing the insertion device;
It is in the point characterized by performing.

  According to the above configuration, in the mounting step after drilling by the punching device, the covering cylinder is mounted on the insertion device replaced with the punching device, and in the insertion step, the covering cylinder is flown through the structure in an uninterrupted state by the insertion device. Insert into the road. The inserted cylindrical body can substantially cover the inner peripheral surface of the flow path in an unsealed state. Next, in the sealing process, the set sealing region in the annular space having a small radial width between the outer peripheral surface of the inserted covering cylinder and the inner peripheral surface of the flow path is sealed. This sealing process causes cracks or the like on the inner peripheral surface of the flow passage of the structure, or even if the reinforcing bars in the structure are cut and exposed to the inner peripheral surface of the flow passage of the structure. It is possible to suppress fluid leakage due to, for example, corrosion of the cut end surface of the reinforcing bar.

  Therefore, it is possible to suppress fluid leakage due to a crack or the like on the inner peripheral surface of the flow path caused by the rotational cutting force or vibration during drilling and the progress of corrosion from the cut end surface of the cut reinforcing bar. In addition, since the inner peripheral surface of the flow channel can be substantially covered in an unsealed state simply by inserting the coated cylindrical body into the flow channel, the gap between the outer peripheral surface of the coated cylindrical body and the inner peripheral surface of the flow channel It is only necessary to seal the set sealing region in the annular space having a small radial width. Therefore, it is possible to efficiently perform the coating process on the inner peripheral surface of the flow path.

  A second characteristic configuration according to the present invention is that a detachment restricting step of restricting detachment movement of the covering cylinder inserted into the flow path by a detachment restricting means is executed.

According to the above configuration, the moving force toward the detachment side due to the fluid pressure acts on the covering cylinder inserted in the flow channel of the structure, but the insertion force is placed in the flow channel by executing the detachment regulating step. The detachment movement of the covered cylindrical body can be reliably regulated by the detachment regulating means.
Accordingly, since the coated cylinder can be inserted and maintained in the flow path, the set sealing region between the outer peripheral surface of the inserted coated cylinder and the inner peripheral surface of the flow path can be reliably sealed. .

  According to a third characteristic configuration of the present invention, the sealing means is press-contacted between the outer peripheral surface of the coated cylinder and the inner peripheral surface of the flow path with the insertion of the coated cylinder in the insertion step. It is comprised from the sealing material arrange | positioned in the state, The said detachment | limiting control means exists in the point comprised with the said sealing material of the said sealing means.

According to the above configuration, the sealing material of the sealing means is pressed between the outer peripheral surface of the coated cylindrical body and the inner peripheral surface of the flow path with the insertion of the coated cylindrical body in the insertion step, and the outer periphery of the coated cylindrical body The set sealing area between the surface and the inner peripheral surface of the flow path can be appropriately sealed. Moreover, detachment movement of the covering cylinder inserted into the flow path can be suppressed by the frictional resistance of the sealing material press-fitted between the outer peripheral face of the covering cylinder and the inner peripheral face of the flow path.
Therefore, the separation regulating means can be advantageously configured in terms of structure and cost by utilizing the sealing material of the sealing means.

  According to a fourth characteristic configuration of the present invention, the sealing means is press-contacted between the outer peripheral surface of the coated cylinder and the inner peripheral surface of the flow path as the covered cylinder is inserted in the insertion step. A plurality of sealing materials arranged in a state, and a filler injected into a sealing region between the outer peripheral surface of the covering cylinder sealed with the sealing material and the inner peripheral surface of the flow path, The detachment restricting means is constituted by the sealing material and the filler of the sealing means.

  According to the above configuration, the plurality of sealing materials that are press-contacted between the outer peripheral surface of the coated cylindrical body and the inner peripheral surface of the flow path in accordance with the insertion of the coated cylindrical body in the insertion step, and the plurality of sealing materials The set sealing region between the outer peripheral surface of the coated cylinder and the inner peripheral surface of the flow path can be more appropriately sealed by the filler injected into the sealed region. In addition, it is possible to more advantageously configure the detachment restricting means in terms of structure and cost by utilizing a plurality of sealing materials and fillers of the sealing means.

  According to a fifth characteristic configuration of the present invention, the insertion device is detachably attached to the outer surface of the structure via a short pipe and a gate valve, and the detachment restricting means is provided on the covering cylinder. It is comprised from the engaging means provided with the joint part and the to-be-engaged part provided in the internal peripheral surface of the said short pipe, The said engaging part and the said to-be-engaged part are the said covering cylinders with respect to the said short pipe Can be switched between a disengagement restricting state in which the disengagement of the covering cylinder body is restricted by the rotation operation of the flow passage and a disengagement state in which relative movement in the flow passage axial direction is allowed. It is in the point which is comprised.

According to the above configuration, when the covering cylinder is inserted into the flow path of the structure by the insertion device, the relative position in the rotation direction of the short tube and the covering cylinder is determined by covering the portion to be engaged with the short tube. By setting the disengaged state to allow passage of the engaging portion of the cylindrical body in the flow path axis direction, the operation of inserting the covered cylindrical body into the flow passage is obstructed by the engaged portion of the short tube. It can be performed reliably and smoothly without being done.
Then, when the engaging part of the coated cylinder passes through the engaged part of the short tube and is inserted into the flow path, the coated cylinder is rotated with respect to the short tube and is released from the disengaged state. By changing to the restricted state, when the moving force in the detaching direction due to the fluid pressure acts on the covered cylinder inserted into the flow path, the engaging portion of the covered cylinder is engaged with the engaged portion of the short pipe. By engaging from the flow path axis direction, the detachment movement of the covering cylinder can be surely prevented.

Therefore, it is possible to perform the insertion operation into the flow path of the coated cylinder surely and smoothly by simply remodeling the coated cylinder by providing the engaging part and providing the engaged part on the inner peripheral surface of the short pipe. In addition, it is possible to reliably prevent the detached movement of the coated cylinder.

  According to a sixth feature of the present invention, the engaged portion of the engaging means is in sliding contact with the outer peripheral surface of the coated cylinder, and the coated cylinder is concentric or substantially concentric with the flow path. It is in the point comprised from the insertion guide protrusion which inserts and guides in a state.

  According to the above-described configuration, when the covering cylinder is inserted into the flow path by the insertion device, the covering cylinder is allowed to flow while supporting the load of the covering cylinder on the insertion guide projection provided on the inner peripheral surface of the short pipe. It is possible to smoothly guide the insertion in a concentric or substantially concentric state with respect to the road. Moreover, since the engaged portion of the engaging means can be configured with the insertion guide protrusion for this purpose, the detachment restricting means can be more advantageously configured in terms of structure and cost.

  According to a seventh characteristic configuration of the present invention, the flange contact portion where the connection flange of the short tube contacts from the flow axis direction is smoothed at the peripheral edge of the opening of the flow channel on the outer surface of the structure. Thereafter, the connecting flange of the short pipe is fixed to the flange abutting part with a bolt with an elastic sealant interposed between the flange abutting part and the connecting flange of the short pipe. .

  In the conventional short pipe mounting process, the outer surface of the structure is hung to expose a part of the internal rebar, and there are many connections in the axial direction and the circumferential direction of the outer surface of the short pipe. A short pipe fixing work process in which one end of a reinforcing bar is welded and the other end of a number of connecting reinforcing bars is welded to an exposed reinforcing bar on the structure side, and a waterproof mortar application working process in which waterproof mortar is applied to a suspended portion on the outer surface of the structure; Is running. Therefore, in the conventional short pipe attaching process, much work is required for each of the hanging work process, the short pipe fixing work process, and the waterproof mortar coating work process.

However, according to the above-described configuration of the present invention, the flange abutting portion where the connecting flange of the short tube abuts from the channel axial direction at the opening peripheral portion of the channel on the outer surface of the concrete structure is smoothed. Therefore, unevenness of the flange contact portion on the outer surface of the structure can be corrected. Therefore, a simple elastic sealing material can be used for waterproofing between the flange contact portion on the outer surface of the structure and the connecting flange of the short pipe.
Therefore, it is only necessary to fix the short pipe connection flange with the smooth contact flange contact portion of the structure with the elastic seal material interposed between them, thereby efficiently installing the short pipe. It can be carried out.

  It is the said covering cylinder used for the flow-path coating processing method of the structure made from concrete as described in any one of the above-mentioned 1st-7th characteristic structure, Comprising: In the one end part of the said covering cylinder, A flange portion capable of contacting the peripheral edge of the opening of the flow channel on the outer surface of the structure is formed, and the outer peripheral surface of the coated cylinder is sealed with the inner peripheral surface of the flow channel. A plurality of sealing materials for the sealing means are provided.

  According to the above configuration, when the covering cylinder is inserted into the flow path of the structure by the insertion device, the flange portion formed at one end of the cover cylinder is the opening peripheral edge of the flow path on the outer surface of the structure It is only necessary to insert it to a position where it comes into contact with the cover, and simplification of the insertion operation of the coated cylinder can be achieved. In addition, in a state where the coated cylinder is inserted into the flow channel, the set sealing between the outer circumferential surface of the coated cylinder and the inner circumferential surface of the flow channel is performed by a plurality of sealing materials provided on the outer circumferential surface of the coated cylinder. The area can be properly sealed.

  A ninth characteristic configuration according to the present invention is that the length from the front end to the flange portion on the outer peripheral surface of the covering cylinder is configured to be equal to or greater than the axial length of the flow path. .

According to the above configuration, when the length from the tip to the flange portion on the outer peripheral surface of the coated cylinder is configured to be the same as the axial length of the flow path, the covered cylinder inserted into the flow path Even if the fluid pressure slightly moves to the separation side due to the fluid pressure, the set sealing region on the inner peripheral surface of the flow path can be maintained substantially properly.
Furthermore, when the length from the front end to the flange portion on the outer peripheral surface of the coated cylinder is configured to be larger than the axial length of the flow path, the covered cylinder inserted in the flow path is fluid pressure. Even if it moves a little to the detachment side, the set sealing area on the inner peripheral surface of the flow path can be reliably maintained sealed.

The partially cutaway side view which shows the mounting process of the flow-path coating processing method of the concrete structure of 1st Embodiment of this invention Enlarged side sectional view of the insertion device Sectional view taken along line III-III in FIG. 1 in the disengaged state Partial cutaway side view showing the mounting process 4 is a cross-sectional view taken along the line V-V in FIG. Partial cutaway side view when the insertion device is moved back to the initial position Enlarged side sectional view when the coated cylinder is inserted into the flow path Enlarged side sectional view when the coated cylinder moves away The part notched side view when the flow-path coating processing method of the concrete structure of 2nd Embodiment of this invention is shown, and the flow-path interruption | blocking jig | tool is mounted | worn with the insertion apparatus Partially cutaway side view of the insertion device with the flow path blocking jig inserted into the flow path blocking position in the coated cylinder Enlarged side sectional view during filling Enlarged side cross-sectional view after filling material filling Partially cutaway enlarged side sectional view showing a third embodiment of the present invention

[First Embodiment]
FIGS. 1-8 shows 1st Embodiment of the flow-path coating processing method of a structure made from concrete, and the coating | coated cylinder 4 used for it. In this flow path covering method, a perforation device (not shown) is formed through a portion of the concrete wall W of a reinforced concrete reservoir, which is an example of a concrete structure, below the water level of the reservoir. The inner peripheral surface 1a of the flow path 1 is covered with a continuous water state (a continuous flow state).
In the above-described flow path covering method, the short pipe (flange short pipe) 2 fixed to the peripheral edge of the opening of the flow path 1 on the outer surface Wa of the concrete wall W and the connecting flange 2B on the downstream side of the short pipe 2 are connected. The gate valve 3 that is formed, the cylindrical coated cylinder 4 that can cover the inner peripheral surface 1 a of the flow path 1, the detachable mounting of the coated cylindrical body 4, and the state facing the flow path 1 The set sealing region between the insertion device 5 connected to the gate valve 3 and the outer peripheral surface 4a of the covered cylinder 4 inserted into the flow channel 1 by the insertion device 5 and the inner peripheral surface 1a of the flow channel 1 Sealing means 6 for sealing L4 and detachment restricting means 7 for restricting detachment movement of the covering cylinder 4 inserted and arranged in the flow path 1 are used.

  The short pipe 2 and the gate valve 3 are used at the time of drilling work by the punching device, and are used as they are in the flow path coating processing method. Among them, the connecting flange 2A on the upstream side of the short pipe 2 is fixed in a watertight state to the outer surface Wa of the concrete wall W by a plurality of bolts 10 and nuts 11 as shown in FIGS. Further, the connecting flange 2B on the downstream side of the short pipe 2 and the connecting flange 3A on the upstream side of the gate valve 3 are fixedly connected with bolts 15 and nuts 16 in a watertight state.

As shown in FIG. 7 and FIG. 8, at least the flange contact portion of the outer surface Wa of the concrete wall W with which the connecting flange 2A on the upstream side of the short pipe 2 contacts is smoothed by polishing, putty filling, substrate adjustment or the like. The smoothed layer 12 is formed. In the present embodiment, the range of the smooth treatment layer 12 is set to a range that extends from the opening edge of the flow channel 1 to the radially outward side of the connecting flange 2 </ b> A of the short tube 2.
Between the smoothed layer 12 of the smoothed concrete wall W and the connecting flange 2A of the short pipe 2, an annular elastic sealing material (rubber mounted in a seal mounting groove on the contact surface side of the connecting flange 2A is provided. The ring 13 is watertightly sealed.
As the bolt 10 for fixing the connecting flange 2A of the short pipe 2, a chemical anchor bolt is used, and the chemical anchor bolt is attached to the bolt fixing hole 14 formed by a drill in the flange fixing portion of the concrete wall W with a chemically reactive adhesive. It is fixed.

As shown in FIG. 1 and FIG. 5, the outer circumferential surface of the cylindrical cutter of the perforating apparatus or the outer circumferential surface 4 a side of the coated cylinder 4 is provided at two circumferential positions in the lower half of the inner circumferential surface of the short tube 2. The first insertion along the flow channel axis direction in which the cylindrical cutter or the coated cylindrical body 4 is inserted and guided in a concentric or substantially concentric state with respect to the perforation center of the concrete wall W or the center of the flow channel 1. The guide protrusion 20 is fixed.
One end of the first insertion guide protrusion 20 is disposed at a position as close as possible to the upstream end of the short tube 2, and the other end of the first insertion guide protrusion 20 enters a position upstream of the gate valve 3. Is arranged in a protruding manner.
Further, at two locations in the circumferential direction of the upper half of the inner peripheral surface of the short tube 2, there are short ridges 21 along the flow path axis direction, one end of which is located at the same position as one end of the first insertion guide protrusion 20. It is fixed. The detachment restricting means 7, which will be described later, regulates the detachment movement of the covering cylinder 4 inserted into the flow path 1 beyond a certain distance by using one end 21 a of the ridge 21 and one end 20 a of the first insertion guide protrusion 20. In one example, one engaged portion 7B of the engaging means is configured.

As shown in FIGS. 1 to 3, the covering cylinder 4 includes a metal covering cylinder portion 4 </ b> A that is formed in a cylindrical shape with an outer diameter smaller than the inner diameter of the flow path 1 and is excellent in corrosion resistance, and a concrete wall W. The flange portion 4B is formed integrally with one end portion of the covering cylinder portion 4A so as to be able to come into contact with the peripheral edge of the opening of the flow channel 1 on the outer surface Wa from the axial direction of the flow channel.
As shown in FIGS. 1 and 2, the cylinder length L1 from the tip of the outer peripheral surface 4a of the coated cylinder 4 to the flange portion 4B is configured to be the same as the axial length L2 of the flow path 1, and this coated cylinder The annular space between the inner peripheral surface 1a of the flow channel 1 and the outer peripheral surface 4a of the covering cylinder 4 is sealed by two constituent members of the sealing means 6 at two locations on the outer peripheral surface 4a of the body 4. An annular sealing material (O-ring or the like) 6a, 6b is provided.

  As shown in FIG. 7, the mounting interval L3 in the flow channel axial direction of both the sealing materials 6a and 6b is a set sealing region L4 including a bar arrangement region in the flow channel axial direction of the reinforcing bar 19 in the concrete wall W. It is configured with a larger interval. Therefore, as shown in FIG. 8, at least the set sealing region on the inner peripheral surface 1 a of the flow path 1 even if the coated cylinder 4 moves to the separation side within the interchangeable range of the separation regulating means 7 by water pressure (fluid pressure). L4 can be reliably maintained sealed.

As shown in FIGS. 3 and 5, the flange portion 4 </ b> B of the covering cylinder 4 has a recess 4 b through which both the first insertion guide protrusions 20 and both protrusions 21 of the short pipe 2 can pass from the flow axis direction. Is formed. The intermediate flange portion 4c of the flange portion 4B located between the concave portions 4b adjacent in the circumferential direction is an engaged portion configured by one end portion 21a of the protrusion 21 and one end portion 20a of the first insertion guide protrusion 20. By engaging with 7B from the direction of the flow path axis, the other engaging portion 7A of the engaging means for preventing the cover cylinder 4 inserted into the flow path 1 from moving beyond a certain level is configured. Yes.
Then, the engaging portion 7A and the engaged portion 7B of the engaging means are engaged from the channel axis direction by the rotation operation of the covering cylinder 4 with respect to the short tube 2 and are covered with the covering tube 4 with respect to the short tube 2. The disengagement restricting state in which the disengagement movement of the short tube 2 is blocked and the disengagement state in which the covering tube body 4 is allowed to pass through in the flow axis direction with respect to the short tube 2 can be switched.

  As shown in FIGS. 1 and 2, the insertion device 5 includes a cylindrical body mounting portion 30 that holds the coated cylindrical body 4 detachably in an exterior state, and the cylindrical body mounting portion 30 in the flow path 1 of the concrete wall W. The insertion operation section 40 for performing the insertion operation and the cylinder mounting section 30 can be housed together with the covering cylinder 4 and fixedly connected to the connection flange 3B on the downstream side of the gate valve 3 with bolts 15 and nuts 16 in a watertight state. And a working case 50 having a connecting flange 50A.

As shown in FIG. 2, the cylindrical body mounting portion 30 includes a mounting cylindrical body 31 having a diameter smaller than the inner diameter of the coated cylindrical body 4 and a length smaller than the length in the flow axis direction of the coated cylindrical body 4. The pusher member 32 slidably fitted in the flow axis direction with respect to the base end portion of the mounting cylinder 31 is provided as a main component.
The pushing member 32 is slidably fitted to a pressing flange portion 32A that comes into contact with the flange portion 4B of the coated cylindrical body 4 from the flow axis direction and a small diameter portion 31a formed on the bottom plate 31A of the mounting cylindrical body 31. A fitting cylinder portion 32B is provided.
An annular support protrusion 31B is integrally formed at the distal end portion of the outer peripheral surface of the mounting cylinder 31 so as to contact and support the distal end portion of the inner peripheral surface of the covering cylinder 4 from the radial direction. Between the annular step surface and the distal end surface of the fitting cylinder portion 32B of the pushing member 32 is radially outwardly supported in pressure contact with the proximal end portion of the inner peripheral surface of the covering cylinder 4 in a stretched state from the radial direction. An annular rubber elastic body 33 that is elastically bulging and deformable is provided on the side.

  Then, when the expansion nut 44 of the insertion operation unit 40 is rotated to the expansion side, the elastic body 33 is bulged and deformed outward in the radial direction along with the close movement of the mounting cylinder 31 and the pushing member 32, and the coated cylinder It will be in the holding state which supports the base end side site | part of the internal peripheral surface of the body 4 in a stretched state. Conversely, when the expansion nut 44 of the insertion operation unit 40 is rotated to the contraction side, the elastic body 33 contracts radially inward by the elastic restoring force as the mounting cylinder 31 and the pushing member 32 move apart. Then, the holding release state becomes smaller than the inner diameter of the coated cylinder 4.

As shown in FIG. 1 and FIG. 2, the insertion operation unit 40 is arranged in the flow path 1 of the concrete wall W through the cylinder mounting part 30 in the work case 50 through the inside of the gate valve 3 and the short pipe 2. The outer shaft 41 and the inner shaft 42 have a length capable of being fed into the inner and outer double shaft structure. The outer shaft 41 is slidably supported by the bottom plate 50 </ b> B of the working case 50 in a watertight manner, and the first screw shaft portion 41 a on the distal end side of the outer shaft 41 is formed by the extrusion member 32 of the cylindrical body mounting portion 30. It is screwed and connected to the connecting cylinder part 32C. On the other hand, the first screw shaft portion 42 a on the distal end side of the inner shaft 42 is screwed to the bottom plate 31 </ b> A of the mounting cylinder 31 of the cylinder mounting portion 30.
As shown in FIG. 2, the second screw shaft portion 42 b formed at the proximal end portion on the operation side of the inner shaft 42 has an end surface of the proximal end portion of the outer shaft 41 from the axial direction via the thrust bearing 43. A pushable expansion nut 44 is screwed.
The outer shaft 41 is composed of a plurality of split outer shafts that can be connected together, and the inner shaft 42 is also composed of a plurality of split inner shafts that can be connected together.

  As shown in FIG. 1 and FIG. 3, there are two places in the circumferential direction of the lower half of the inner peripheral surface of the working case 50 on the outer peripheral surface of the cylindrical cutter of the drilling device or the outer peripheral surface 4 a side of the covering cylinder 4. A second insertion guide along the channel axial direction that slides in contact and guides the cylindrical cutter or the coated cylinder body 4 in a concentric or substantially concentric state with respect to the drilling center of the concrete wall W or the center of the flow channel 1. The protrusion 51 is fixed.

Next, a description will be given of a first embodiment of the flow path covering treatment method for a concrete structure using equipment such as the covering cylinder 4 and the insertion device 5 configured as described above.
[1] About the mounting process
1 to 3 show the inner peripheral surface of the flow path 1 in the insertion device 5 attached to the outer surface Wa side of the concrete wall W in a state of facing the flow path 1 formed through the concrete wall W by a perforating device. A mounting process for mounting the coated cylindrical body 4 capable of covering the above is shown.
In this mounting step, as shown in FIG. 1, for the operation of the insertion device 5 in which the covering cylinder 4 is mounted on the connecting flange 3B on the downstream side of the gate valve 3 in the closed state where the perforating device is removed. The connection flange 50A of the case 50 is fixedly connected in a watertight state.
As shown in FIG. 2, the covering cylinder 4 is externally provided across the mounting cylinder 31 and the pushing member 32 of the cylinder mounting portion 30 of the insertion device 5. In this exterior state, the flange portion 4B of the coated cylinder body 4 is in contact with the pressing flange portion 32A of the pushing member 32 from the flow path axis direction.

  Further, in this mounting step, the expansion nut 44 of the insertion operation unit 40 is rotated to the expansion side, and the elastic body 33 is moved in the radial direction by the proximity movement of the mounting cylinder 31 and the pushing member 32 accompanying this rotation operation. It has been changed to a state of bulging and deforming outward. Therefore, the proximal end portion of the inner peripheral surface of the coated cylinder 4 is pressed and supported in a stretched state from the radial direction by the bulged and deformed elastic body 33, and the distal end portion of the inner peripheral surface of the coated cylinder 4 is The mounting cylindrical body 31 is received and supported in the radial direction by an annular support protrusion 31 </ b> B formed integrally with the distal end side portion of the outer peripheral surface of the mounting cylindrical body 31. Thereby, the covering cylinder 4 can be reliably and satisfactorily held in a predetermined mounting posture at two points of the elastic body 33 and the annular support protrusion 31B.

As shown in FIG. 1 and FIG. 2, the inner peripheral surface 1 a of the flow path 1 and the coated cylinder 4 are formed at two locations in the flow path axis direction on the outer peripheral surface 4 a of the coated cylinder 4 by the constituent members of the sealing means 6. Annular sealing materials (O-rings and the like) 6a and 6b are provided for sealing the annular space between the outer circumferential surface 4a and the outer circumferential surface 4a. As shown in FIGS. 7 and 8, the mounting interval L3 in the flow path axis direction of both the sealing materials 6a and 6b is a set sealing including the bar arrangement region in the flow path axis direction of the reinforcing bar 19 in the concrete wall W. The interval is larger than that of the region L4.
Further, the sealing members 6a and 6b of the covering cylinder 4 slide in the direction of the flow path axis with the second insertion guide protrusions 51 fixed to two places in the circumferential direction of the lower half of the inner peripheral surface of the working case 50. Contact freely.

Both the second insertion guide protrusions 51 on the inner peripheral surface of the working case 50 and the two first insertion guide protrusions 20 fixed at two positions in the circumferential direction of the lower half portion on the inner peripheral surface of the short tube 2 are a flow path axis. Two guide rails that are straight in the direction are formed.
Moreover, as shown in FIGS. 1 and 3, the recesses 4 b formed at four locations in the circumferential direction of the flange portion 4 </ b> B of the covering cylinder 4 are formed by both the second insertion guide protrusions 51 of the working case 50 and the short pipe 2. Both of the first insertion guide protrusions 20 and the protrusions 21 fixed at two circumferential positions in the upper half of the inner peripheral surface of the short tube 2 are arranged in the same phase facing each other in the flow path axis direction. .
Therefore, as shown in FIG. 3, the concave portions 4 b of the flange portion 4 B of the covering cylinder 4 are formed by both the second insertion guide projections 51 of the working case 50 and the first insertion guide projections 20 and the protrusions 21 of the short tube 2. It is in a state in which it can pass through along.

[2] About insertion process and sealing process
FIG. 4 shows an insertion step of inserting the coated cylinder 4 of the insertion device 5 into the flow path 1 of the concrete wall W in an undisturbed state, and the outer peripheral surface 4a of the inserted coated cylinder 4 and the flow path 1 A sealing process step of sealing the set sealing region L4 between the peripheral surface 1a by the sealing means 6 is shown.
In the insertion step, the valve body 3C of the gate valve 3 is opened, and the insertion operation unit 40 of the insertion device 5 is pushed. At the time of this pushing operation, both the sealing materials 6a and 6b on the outer peripheral surface 4a side of the covering cylinder 4 mounted on the cylinder mounting portion 30 of the insertion device 5 are connected to both the second insertion guide protrusions 51 of the working case 50. The short pipe 2 is slidably guided along both the first insertion guide protrusions 20 and the ridges 21.

  As shown in FIG. 4, a state in which the flange portion 4B of the covering cylinder 4 is in contact with the opening peripheral edge portion of the flow channel 1 on the outer surface Wa of the concrete wall W from the flow channel axial direction is the maximum insertion state. As the covered cylinder 4 is inserted into the flow path 1, both the sealing materials 6 a, 6 b on the outer peripheral surface 4 a side of the covered cylinder 4 are reduced in diameter by contact with the inner peripheral surface 1 a of the flow path 1. It enters the flow path 1 while being compressed to the side. Therefore, both the sealing materials 6a and 6b on the outer peripheral surface 4a side of the coated cylindrical body 4 are changed to a sealed state in pressure contact with the inner peripheral surface 1a of the flow path 1, and the sealed state is maintained.

[3] About the withdrawal regulation process
4 and 5 show a detachment restricting process in which the detachment movement of the covering cylinder 4 inserted into the flow path 1 is restricted by the detachment restricting means 7.
The separation regulating means 7 in this separation regulating step is composed of two components. One of the components is composed of both sealing members 6 a and 6 b of the sealing means 6. In this case, due to the frictional resistance of both seal members 6a and 6b press-fitted between the outer peripheral surface 4a of the coated cylindrical body 4 and the inner peripheral surface 1a of the flow path 1, the detachment movement of the coated cylindrical body 4 from the set insertion region. Can be suppressed.

The other constituent elements of the detachment restricting means 7 are constituted by an engaging means including an engaging portion 7A provided on the covering cylinder 4 and an engaged portion 7B provided on the inner peripheral surface of the short tube 2. ing. The engaging portion 7A and the engaged portion 7B of the engaging means are engaged from the axial direction of the flow path by the turning operation of the covering cylinder 4 with respect to the short pipe 2 to restrict the disengagement movement of the covering cylinder 4. It is configured to be switchable between a disengagement restricting state to be engaged and a disengaged state permitting relative movement in the flow path axis direction.
In the present embodiment, the engaging portion 7A is configured with an intermediate flange portion 4c located between the recessed portions 4b adjacent to each other in the circumferential direction in the flange portion 4B of the covering cylinder 4. On the other hand, the engaged portion 7 </ b> B is configured by one end 21 a of the protrusion 21 and one end 20 a of the first insertion guide protrusion 20.

  As described in the above-described insertion step, when the covering cylinder 4 is inserted into the flow path 1 by the insertion device 5, as shown in FIG. Set the relative position to the disengaged state. That is, the engagement portion 7A on the coated cylinder 4 side is configured with respect to the one end portion 21a of the protrusion 21 and the one end portion 20a of the first insertion guide protrusion 20 constituting the engaged portion 7B on the short tube 2 side. By setting the intermediate flange portion 4c of the flange portion 4B to the disengaged state in which the intermediate flange portion 4c is not engaged in the flow channel axial direction, the insertion operation of the covered cylinder 4 into the flow channel 1 is performed. 7B can be performed reliably and smoothly without being disturbed.

And, in the separation regulating step, as shown in FIG. 5, when the engaging portion 7A on the coated cylinder 4 side passes through the engaged portion 7B on the short tube 2 side and is inserted into the flow path 1, In other words, when the flange portion 4B of the covering cylinder 4 comes into contact with the opening peripheral edge portion of the flow channel 1 on the outer surface Wa of the concrete wall W from the flow channel axial direction, the insertion operation unit 40 of the insertion device 5 is moved. By rotating, the relative position of the short tube 2 and the covering cylinder 4 in the rotation direction is changed from the disengaged state to the disengagement restricted state.
Therefore, as shown in FIG. 8, even if the covered cylinder 4 inserted into the flow path 1 is disengaged and moved by water pressure (fluid pressure), the ridge 21 constituting the engaged portion 7B on the short tube 2 side. The intermediate flange portion 4c of the flange portion 4B constituting the engaging portion 7A on the coated cylinder body 4 side is engaged with the one end portion 21a of the first insertion guide protrusion 20 and the one end portion 20a of the first insertion guide protrusion 20 from the flow path axis direction. The separation movement of the covering cylinder 4 can be reliably prevented.

  In addition, as shown in FIG. 7, the mounting interval L3 in the flow channel axial direction of both the sealing materials 6a and 6b is a set sealing region L4 including a bar arrangement region in the flow channel axial direction of the reinforcing bar 19 in the concrete wall W. Even if the covering cylinder 4 moves to the separation side within the accommodation range of the separation regulating means 7 by water pressure (fluid pressure) as shown in FIG. At least the set sealing region L4 in the inner peripheral surface 1a can be securely maintained.

[4] About removal process
FIG. 6 shows a removal process for removing the insertion device 5.
In this removal process, as shown in FIG. 4, the expansion nut 44 of the insertion operation unit 40 is contracted after the separation regulating process in which the covering cylinder 4 is inserted and held in a sealed state in the flow path 1 of the concrete wall W. Rotate it back to the side. By this return rotation operation, the elastic body 33 contracts radially inward by the elastic restoring force as the mounting cylinder 31 and the pushing member 32 move away from each other, and the holding cylinder body 4 becomes smaller than the inner diameter of the covering cylinder body 4. It becomes a release state.
Therefore, even if the insertion operation unit 40 of the insertion device 5 is pulled out, the covered cylinder 4 is inserted and held in the flow path 1 of the concrete wall W, and the tube of the insertion device 5 is placed against the covered cylinder 4. Only the body mounting part 30 is extracted.

  Then, as shown in FIG. 6, when the cylinder mounting portion 30 of the insertion device 5 is moved back into the working case 50, the valve body 3 </ b> C of the gate valve 3 is closed, and the downstream side of the gate valve 3. The working case 50 of the insertion device 5 is removed from the connecting flange 3B.

[Second Embodiment]
FIGS. 9-12 shows 2nd Embodiment of the flow-path coating processing method of a structure made from concrete.
In the flow path covering method according to the second embodiment, after performing the mounting process, the inserting process, the sealing process, the separation regulating process, and the removing process of the first embodiment, the upstream side in the coated cylinder 4 The flow path blocking step of temporarily stopping the flow path blocking position with the flow path blocking jig 60, the outer peripheral surface 4a of the coated cylinder 4 sealed with both the sealing materials 6a and 6b of the sealing means 6 and the flow path 1 A filling material injecting step of injecting cement milk 76, which is an example of a solidifying filling material, into the sealed region between the peripheral surface 1a and a jig removing step of removing the flow path blocking jig 60. Run.

As shown in FIG. 9, the flow path blocking jig 60 is detachably attached to the distal end portion of the insertion operation unit 40 of the insertion device 5, and the flow path blocking jig 60 is attached to the flow path of the concrete wall W. In performing the insertion operation into the covering cylinder 4 attached to 1, the insertion operation unit 40 of the insertion device 5 is pushed into the work case 50.
The flow path blocking jig 60 includes a first pressing plate 60A that is detachably connected to the distal end portion of the outer shaft 41, a second pressing plate 60B that is detachably connected to the distal end portion of the inner shaft 42, and a second pressing plate 60B. It is composed of a rubber channel blocker 60C that elastically bulges and deforms radially outward as the first pressing plate 60A moves closer to the pressing plate 60B and blocks the channel 1.

  As shown in FIG. 11, the filling device 70 includes a pumping unit 71 that pumps cement milk 76 obtained by mixing a cement-based material and water, and a covering cylinder 4 to which a hose 72 of the pumping unit 71 is connected. The inlet 73 on the lower side, the outlet 74 on the upper side of the coated cylinder 4 from which the cement milk 76 filled in the sealing area flows out, and the inlet 73 and the outlet 74 are closed in a sealed state after the cement milk 76 is filled. It is comprised from the plug 75 which does.

  As shown in FIG. 11, the covering cylinder 4 is composed of the sealing member 6 at two locations on the outer peripheral surface 4 a in the flow axis direction, and the inner peripheral surface 1 a of the flow path 1 and the covering cylinder 4. An annular seal member 6a, 6b that seals at least the set sealing region L4 in the annular space between the outer peripheral surface 4a and the sealing member 6a, 6b in the coated cylinder portion 4A is provided. The thing in which the exit 74 is formed is used.

Next, the flow path blocking process and the filler injection process of the flow path covering treatment method of the second embodiment using the flow path blocking jig 60 and the filling device 70 configured as described above will be described.
[5] Regarding the flow path blocking step,
As shown in FIG. 9, the connection flange 50 </ b> A of the work case 50 in which the flow path blocking jig 60 and the insertion operation unit 40 are attached to the connection flange 3 </ b> B on the downstream side of the gate valve 3 in the closed state is watertight. It is fixedly connected in the state.

Next, as shown in FIG. 10, the valve body 3 </ b> C of the gate valve 3 is opened, the insertion operation unit 40 is pushed in, and the flow path blocking jig 60 is placed in the flow path blocking position in the covered cylinder 4. To send. In this state, when the expansion nut 44 of the insertion operation unit 40 is rotated to the expansion side, the rubber channel blocker 60C is moved radially outward along with the close movement of the first pressing plate 60A with respect to the second pressing plate 60B. The flow path blocking body 60C is changed to a flow path blocking state in which the entire circumference of the flow path blocking body 60C is pressure-welded in a watertight manner to the entire circumference of the inner peripheral surface of the coated cylinder body 4.
An upstream side sealing material 6a is disposed at a portion corresponding to the flow path blocking position of the coated cylinder 4 by the flow path blocking jig 60, and the upstream side sealing material 6a allows the entire circumference of the flow path blocking body 60C to be disposed. It is possible to firmly support the flow path blocking portion of the coated cylindrical body 4 that is pressed in a watertight state from the outside in the diameter direction.

  When the flow path 1 is blocked in the covering cylinder 4, as shown in FIG. 11, the outer shaft 41 of the insertion operation unit 40 and the first pressing plate 60 </ b> A and the second pressing plate 60 </ b> B of the flow path blocking jig 60. The inner shaft 42 is separated, and the insertion operation unit 40 is pulled out to the working case 50 side while leaving the flow path blocking jig 60 in the flow path blocked state at the flow path blocking position in the coated cylinder 4. Thereafter, the valve body 3 </ b> C of the gate valve 3 is closed, and the working case 50 is removed from the connecting flange 3 </ b> B on the downstream side of the gate valve 3.

[6] About the filler injection step,
As shown in FIG. 11, a hose 72 of a pumping unit 71 that pumps cement milk 76 is connected to an inlet 73 on the lower side of the coated cylinder 4, and is sealed with both sealing materials 6 a and 6 b of the sealing means 6. Cement milk 76 is filled in a sealed region between the outer peripheral surface 4 a of the coated cylinder 4 and the inner peripheral surface 1 a of the flow path 1. The outflow of the cement milk 76 from the discharge port 74 on the upper side of the coated cylinder 4 is visually confirmed. If there is an outflow of the cement milk 76, it is determined that the cement milk 76 is filled in the sealed region, and the pumping unit 71 The pumping of the cement milk 76 is stopped. Thereafter, as shown in FIG. 12, the inlet 73 and the outlet 74 of the coated cylinder 4 are closed with a plug 75.

Then, by solidifying the cement milk 76 filled in the sealed region, the inner peripheral surface 1a of the flow path 1 of the concrete wall W and the outer peripheral surface 4a of the covering cylinder 4 are integrally fixed via the cement milk 76. The
Therefore, in the flow path covering method according to the second embodiment, the sealing means 6 that seals at least the set sealing region L4 between the outer peripheral surface 4a of the coated cylinder 4 and the inner peripheral surface 1a of the flow path 1 is coated. It is injected into both sealing materials 6a and 6b disposed in a pressure contact state between the outer peripheral surface 4a of the cylindrical body 4 and the inner peripheral surface 1a of the flow path 1, and a sealed region sealed with both the sealing materials 6a and 6b. It is comprised from the cement milk 76 which is an example of a filler.

Furthermore, in the flow path covering method according to the second embodiment, the separation regulating means 7 in the separation regulating step is composed of three components. Of these, the first component is composed of both sealing members 6 a and 6 b of the sealing means 6.
The second component is configured with cement milk 76 which is an example of a filler that is filled into the sealed area.
The third component is composed of an engaging means including an engaging portion 7A provided on the coated cylinder 4 and an engaged portion 7B provided on the inner peripheral surface of the short tube 2. The engaging portion 7A and the engaged portion 7B of the engaging means are engaged from the axial direction of the flow path by the turning operation of the covering cylinder 4 with respect to the short pipe 2 to restrict the disengagement movement of the covering cylinder 4. It is configured to be switchable between a disengagement restricting state to be engaged and a disengaged state permitting relative movement in the flow path axis direction.
Thereby, the sealing region between the outer peripheral surface 4a of the covering cylinder 4 and the inner peripheral surface 1a of the flow path 1 can be more appropriately sealed, and at the same time, a plurality of sealing materials 6a and 6b of the sealing means 6 are provided. A cement milk 76 as an example of a filler, an intermediate flange portion 4c between the recesses 4b in the flange portion 4B of the covering cylinder 4 constituting the engaging portion 7A of the engaging means, and an engaged portion of the engaging means The detachment restricting means 7 can be more advantageously configured in terms of structure and cost by the one end 21a of the protrusion 21 and the one end 20a of the first insertion guide protrusion 20 constituting the 7B.

[7] About the jig removal process
The connection flange 50A of the work case 50 to which the insertion operation unit 40 is attached is fixedly connected in a watertight state to the connection flange 3B on the downstream side of the gate valve 3 in the closed state. Next, the valve body 3 </ b> C of the gate valve 3 is opened, and the insertion operation unit 40 attached to the work case 50 is used to shut off the flow path blocking position in the covered cylinder body 4. The pushing operation is performed up to the tool 60, and the outer shaft 41 and the inner shaft 42 of the insertion operation unit 40 are connected to the first pressing plate 60A and the second pressing plate 60B of the flow path blocking jig 60 (see FIG. 10).

Then, when the expansion nut 44 of the insertion operation unit 40 is rotated to the reduced diameter side, the flow path blocker 60C is moved radially inward by the elastic restoring force as the first pressing plate 60A moves away from the second pressing plate 60B. The flow path blocking body 60 </ b> C is changed to a blocking release state in which the flow path blocking body 60 </ b> C is separated from the inner peripheral surface of the coated cylinder body 4.
In this state, the insertion operation section 40 of the insertion device 5 is pulled out, and the flow path blocking jig 60 in the blocking release state is moved back into the working case 50 (see FIG. 9), and then the valve of the gate valve 3 The body 3C is closed, and the working case 50 is removed from the connecting flange 3B on the downstream side of the gate valve 3.

  In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Third Embodiment]
FIG. 13 shows a third embodiment of the covering cylinder 4 used in the flow path covering treatment method for the concrete structure. In this third embodiment, the cylinder length L1 from the tip of the outer peripheral surface 4a of the coated cylinder 4 to the flange portion 4B is larger than the axial length L2 of the flow path 1 formed through the concrete wall W. It is configured.
And as shown in the upper half sectional view of FIG. 13, the flange portion 4B of the covering cylinder 4 is in contact with the peripheral edge portion of the flow channel 1 on the outer surface Wa of the concrete wall W from the flow channel axial direction. Then, the front-end | tip of the covering cylinder 4 protrudes from the inner surface Wb of the concrete wall W. FIG.
Further, as shown in the lower half sectional view of FIG. 13, the intermediate flange portion 4c between the recesses 4b in the flange portion 4B of the covering cylinder 4 constituting the engaging portion 7A is a protrusion constituting the engaged portion 7B. In a state where the one end 21 a of the strip 21 and the one end 20 a of the first insertion guide protrusion 20 are in contact with each other, the tip of the covering cylinder 4 is positioned flush or substantially flush with the inner surface Wb of the concrete wall W.
Therefore, even if the covering cylinder 4 inserted into the flow channel 1 moves slightly to the separation side due to water pressure, the set sealing region L4 of the inner peripheral surface 1a of the flow channel 1 can be reliably sealed.

  In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Other Embodiments]
(1) In configuring the detachment restricting means 7 for restricting the detachment movement of the covering cylinder 4 inserted into the flow path 1, in the first embodiment described above, it is engaged with the sealing materials 6 a and 6 b of the sealing means 6. It comprised from the combination of the engaging part 7A and the engaging part 7B of a means. In the second embodiment described above, the sealing material 6a, 6b of the sealing means 6 and cement milk 76 as an example of the filler are combined with the engaging portion 7A and the engaged portion 7B of the engaging means. . However, the present invention is not limited to this configuration. For example, when the water pressure acting on the covering cylinder 4 is small, the sealing member 6 may include only the sealing materials 6a and 6b.
Furthermore, the length from the front-end | tip to the flange part 4B in the outer peripheral surface 4a of the coating | coated cylinder 4 is comprised more largely than the axial direction length of the flow path 1 penetrated by the concrete wall W, and the inner surface Wb of the concrete wall W The above-described detachment restricting means 7 may be configured with the diameter-enlarging tip portion of the covering cylinder body 4 by expanding and deforming the tip end portion of the covering cylinder body 4 protruding from the covering cylinder body 4 in a retaining state.

  (2) In the second embodiment described above, the cement milk 76 is exemplified as the filler, but the filler may be a resin-based adhesive, a foamed resin that foams after filling, or the like.

  (3) In each of the above-described embodiments, the pair of sealing materials 6a and 6b disposed in the press contact state is provided between the outer peripheral surface 4a of the covering cylinder 4 and the inner peripheral surface 1a of the flow path 1. When the flange portion 4B of the cylindrical body 4 is in close contact with the peripheral edge of the opening of the flow channel 1 on the outer surface Wa of the concrete wall W, the outer peripheral surface 4a of the covering cylindrical body 4 and the inner peripheral surface 1a of the flow channel 1 One sealing material 6a may be arranged between the two. Of course, you may arrange | position three or more sealing materials between the outer peripheral surface 4a of the covering cylinder 4 and the inner peripheral surface 1a of the flow path 1.

  (4) In each of the above-described embodiments, the first insertion guide protrusion 20 in which the engaged portion 7B of the engaging means is fixed to two places in the circumferential direction of the lower half portion of the inner peripheral surface of the short tube 2, and the short tube 2 is composed of a short ridge 21 fixed at two circumferential positions in the upper half of the inner peripheral surface of the inner peripheral surface, but the engaged portion 7B is either one of the first insertion guide protrusion 20 or the short ridge 21. May be configured.

(5) In the above-described embodiment, the separation restricting means 7 includes the position holding means such as the sealing materials 6a and 6b for holding the covering cylinder 4 inserted into the flow path 1 of the concrete wall W, and the flow path 1. A fixing means such as cement milk 76 for fixing the coated cylinder 4 inserted into the concrete wall W, and an engagement for preventing the separation movement of the coated cylinder 4 inserted into the flow path 1 from exceeding a certain level. Although comprised from at least one with the means, it is not limited to this structure. For example, a dedicated fixing means such as a solidifying filler 76 or a bolt for fixing the covering cylinder 4 inserted into the flow path 1 to the concrete wall W is provided, and the detachment restricting means 7 is fixed to the covering cylinder 4. Then, the covering cylinder 4 may be held in position until it is fixed to the concrete wall W, or may be specially configured for the function of preventing engagement of a certain amount of separation movement.
As an example, the sealing means 6 is disposed in a pressure contact state between the outer peripheral surface 4a of the coated cylinder 4 and the inner peripheral surface 1a of the flow path 1 with the insertion of the coated cylinder 4 in the insertion process. A plurality of sealing materials 6a and 6b, and solidification filling injected into a sealed region between the outer peripheral surface 4a of the covered cylinder 4 and the inner peripheral surface 1a of the flow channel 1 sealed with the sealing materials 6a and 6b. And the detachment restricting means 7 is engaged with the covering cylinder 4 inserted into the flow path 1 from the flow axis direction so as to prevent the detachment movement of the covering cylinder 4 beyond a certain level. It comprises an engaging means.

DESCRIPTION OF SYMBOLS 1 Flow path 1a Inner peripheral surface 2 Short pipe 2A Connection flange 3 Gate valve 4 Covering cylinder 4B Flange part 4a Outer peripheral surface 5 Insertion device 6 Sealing means 6a Seal material 6b Seal material 7 Departure restricting means 7A Engaging part 7B Engaged Part 10 Bolt 13 Elastic seal material 20 Insertion guide protrusion (first insertion guide protrusion)
76 Filling material (cemented milk)
L1 Tube length L2 Channel 1 axial length L3 Installation interval L4 Set sealing area W Structure (concrete wall)
Wa exterior

Claims (9)

A concrete structure channel covering method for covering the inner peripheral surface of a channel formed through a drilling device in a concrete structure in an uninterrupted state,
A mounting step of mounting a covering cylinder capable of covering the inner peripheral surface of the flow path to an insertion device attached to the outer surface side of the structure in a state of facing the flow path;
An insertion step of inserting the covering cylinder of the insertion device into the flow path in an uninterrupted flow state;
A sealing process step of sealing the set sealing region between the outer peripheral surface of the inserted coated cylinder and the inner peripheral surface of the flow path with a sealing means;
A removal step of removing the insertion device;
A flow path covering method for a concrete structure, characterized in that   The flow path covering treatment method for a concrete structure according to claim 1, wherein a detachment restricting step of restricting the detachment movement of the covering cylinder inserted into the flow path by a detachment restricting means is executed.   The sealing means is composed of a sealing material that is disposed in a pressure contact state between the outer peripheral surface of the coated cylindrical body and the inner peripheral surface of the flow path with the insertion of the coated cylindrical body in the insertion step. 3. The flow path covering method for a concrete structure according to claim 2, wherein the detachment restricting means comprises the sealing material of the sealing means.   The sealing means includes a plurality of sealing materials arranged in a press-contact state between the outer peripheral surface of the coated cylindrical body and the inner peripheral surface of the flow path with the insertion of the coated cylindrical body in the inserting step. And a filling material injected into a sealing region between the outer peripheral surface of the covering cylinder sealed with the sealing material and the inner peripheral surface of the flow path, and the detachment restricting means includes the sealing means The flow path coating method for a concrete structure according to claim 2, comprising the sealing material and the filler.   The insertion device is detachably attached to the outer surface of the structure via a short tube and a gate valve, and the detachment restricting means includes an engaging portion provided on the covering cylinder and an inner peripheral surface of the short tube. And the engaged portion and the engaged portion are arranged in the direction of the flow path axis by rotating the covering cylinder relative to the short tube. 3. The switch is configured to be switchable between a disengagement restricting state in which the disengagement of the covering cylinder body is restricted by engaging from a disengagement state in which relative movement in the flow path axis direction is permitted. Flow channel coating method for concrete structures.   The engaged portion of the engaging means is configured by an insertion guide protrusion that is in sliding contact with the outer peripheral surface of the covering cylinder and inserts and guides the covering cylinder in a concentric or substantially concentric state with respect to the flow path. A flow path coating method for a concrete structure according to claim 5.   After the flange abutting portion where the connecting flange of the short tube abuts from the channel axial direction on the outer peripheral surface of the flow path on the outer surface of the structure is smoothed, the flange abutting portion and the short portion are processed. The flow of the concrete structure according to claim 5 or 6, wherein the connecting flange of the short pipe is fixed to the flange contact portion with a bolt in a state where an elastic sealing material is interposed between the connecting flange of the pipe and the connecting flange. Road covering treatment method.   It is the said covering cylinder used for the flow-path coating processing method of the structure made from concrete of any one of Claims 1-7, Comprising: At the one end part of the said covering cylinder, in the outer surface of the said structure A flange portion that can be brought into contact with the peripheral edge of the opening of the flow path is formed, and a plurality of sealing means for sealing a space between the outer peripheral surface of the covering cylinder and the inner peripheral surface of the flow path. A coated cylinder provided with a sealing material. The coated cylinder according to claim 8, wherein a cylinder length from the tip of the outer peripheral surface of the coated cylinder to the flange portion is configured to be equal to or greater than an axial length of the flow path.

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