KR20220000129A - Construction apparatus for soil-nail and construction method using the same - Google Patents

Abstract

The present invention relates to a soil nail construction apparatus and a construction method using the same and, more specifically, to a soil nail construction apparatus capable of shortening a construction period and improving constructability and construction quality by enabling convenient and quick construction and enabling a stable airtightness maintenance action. In accordance with the present invention, the soil nail construction apparatus includes: a reinforcement material inserted into a drilling hole formed on the ground; an injection member placed at an inlet of the drilling hole; an expansion packer installed to maintain airtightness between the inner surface of the drilling hole and the reinforcement material; a connection line connected between the expansion packer and the injection member; and an expansion fluid control valve installed on the connection line.

Description

SOIL-NAIL CONSTRUCTION DEVICE AND CONSTRUCTION METHOD USING THE SAME

The present invention relates to a nail nail construction apparatus and a construction method using the same, and more particularly, to be able to perform construction conveniently and quickly, and to stably perform an airtight operation, thereby shortening the period of time, and improving workability and construction performance. It relates to a nail nail construction apparatus capable of improving quality and a construction method using the same.

In general, the ground reinforcement work is carried out to prevent collapse due to the loss of soil due to the infiltration of rainwater or groundwater into the slopes of the cut-off site during various civil works such as road construction, housing complex construction, waterway and embankment construction.

Various construction methods are being implemented for this ground reinforcement work, but the nail nailing method is mainly used as a representative method of burying reinforcement materials on the slope.

The nail nailing method is a method of drilling a buried hole on an inclined surface such as an incision site, inserting a reinforcing material such as an underground bolt, and then injecting and curing a filler such as concrete mortar into the buried hole so that the reinforcing material is fixed and supported on the original ground.

And, when the nail nailing method is completed, it is connected to the exposed part of the reinforcing material and the precast panel or block forming the retaining wall to support the overturning moment.

For example, as for the nail nailing method, as disclosed in Korean Patent Registration No. 10-0778608, 'a pressurized nailing apparatus and method using a double tube' has been proposed.

As shown in FIG. 1, this pressurized nailing device using a double pipe includes an outer casing 30 that is inserted into the drilling hole 12 to support the ground, and is inserted into the outer casing, and a grouting inlet 41 at the entrance. ) is installed, the reinforcing rod 50 penetrates the inner casing and is inserted into the perforated hole, the expansion packer 60 supported between the inner casing and the outer casing, and the expansion packer is selectively expanded It consists of a filling hose 70 and at least one spacer 80 that is fitted around the reinforcing bar and maintains a uniform spacing between the reinforcing bar and the perforated hole.

According to the conventional pressurized nailing device using the above-described double tube, the filling material can be sprayed while airtightness is maintained by the expansion packer 60 coupled to the inner circumferential surface of the outer casing 30, but there are several problems as follows.

First, in the conventional pressurized nailing device, when the outer diameter of the outer casing 30 is smaller than the inner diameter of the perforated hole 12, the outer casing 30 is separated to the outside or the filler fills a gap with the perforated hole during high-pressure injection of the filler. If the outer diameter of the outer casing 30 is larger than the inner diameter of the perforated hole 12, it cannot be inserted into the perforated hole 12, so a separate pressurizing device or pressurizing tool is required, and a large number of insertions are required. There is a disadvantage in that it takes time and the workability is deteriorated.

And, in the conventional pressurized nailing device, the water injected into the expansion packer 60 must be removed in the state in which the grouting is completed, but as shown in FIG. 1, the expansion packer 60 is inclined upward in the drilling hole 12. Not only is drainage difficult, but the outer casing 30 must be separated from the perforated hole 12 after removing the expansion packer 60, but the outer casing 30 firmly press-fitted into the perforated hole 12 is not easily separated. The disadvantage is that it requires a lot of time and manpower.

In particular, in the conventional pressurized nailing device, when the grouting material is injected at high pressure, the high pressure injection is difficult as the expansion packer 60 slides and leaves the perforation hole 12 outside. Have.

Korean Patent Laid-Open Patent No. 10-2005-0118318 "Eco-friendly excavation surface and slope ground reinforcement method" Korean Patent Registration No. 10-0778608 "A device and method for pressurized nailing using a double tube" Korea Patent No. 10-1912245 "Pressure-type ground reinforcement device and ground reinforcement method using the same"

The present invention is a nail nail that has been proposed in view of the above content, which allows for convenient and quick construction and to stably perform airtightness, thereby shortening the period of time and improving workability and construction quality. An object of the present invention is to provide a construction apparatus and a construction method using the same.

Another object of the present invention is to provide a nail nail construction apparatus capable of compatibly constructing perforated holes of various sizes and increasing bearing capacity while reducing the diameter of a steel pipe used as a reinforcing material, thereby reducing construction costs and the same. It provides the construction method used.

In order to achieve the above object, a nail nail construction apparatus according to the present invention comprises: a reinforcing material inserted into a perforation hole formed in the ground; an injection member disposed at the inlet of the perforation hole; an expansion packer installed to maintain airtightness between the inner surface of the drilling hole and the reinforcing material; a connection line connected between the expansion packer and the injection member; and an expansion fluid control valve installed on the connection line.

The nail nail construction apparatus according to the present invention may include a grouting material control means installed in the injection member to control the supply of the grouting material.

And, the nail nail construction apparatus according to the present invention may further include a strainer installed on the connection line.

The expansion packer may include a hollow body having a fluid injection chamber formed therein, a through hole penetrating through the center of the hollow body, and a connector formed in the hollow body to be connected to the connection line.

Preferably, the expansion packer is a main packer having a hollow body having a main fluid injection chamber formed therein, a through hole penetrating through the center of the hollow body, and a main connector formed in the hollow body to be connected to the connection line. body; an auxiliary hollow body laminated on the outer surface of the hollow body and having an auxiliary fluid injection chamber therein, and at least one auxiliary packer body having an auxiliary connector formed on the auxiliary hollow body to be connected to the connection line; and a plurality of press-fitting protrusions formed on the auxiliary packer body and press-fitted into the inner surface of the perforation hole during expansion.

The connection line includes a main connection line connected to the injection member, a first branch connection line branched from the main connection line and connected to the main packer body, and a second branch connection line branched from the main connection line and connected to the auxiliary packer body. It may include a branch connection line, and a strainer may be installed in the main connection line.

The expansion fluid control valve may include a first opening/closing valve installed in the first branch connection line, a second opening/closing valve installed in the second branch connection line, and a third opening/closing valve installed in the main connection line. .

The nail nail construction apparatus according to the present invention includes a first pressure sensing means for sensing the internal pressure of the fluid injection chamber; a second pressure sensing means for sensing the internal pressure of the auxiliary fluid injection chamber; and a control unit for controlling the driving of the first on/off valve, the second on/off valve, the expansion fluid control valve, and the grouting material control unit according to the sensing signals applied from the first pressure sensing means and the second pressure sensing unit. ; may be included.

The reinforcing material may include a pipe-shaped reinforcing material body having a flow hole, and a plurality of binding grooves recessed into the outer surface of the reinforcing material body.

On the other hand, in order to achieve the above object, in the construction method using the soil nail construction apparatus according to the present invention, in the construction method using the soil nail construction apparatus, the reinforcing material is inserted into the drilling hole using the soil nail construction apparatus and grouting A soil nail construction step of injecting and curing ashes is performed, wherein the soil nail construction step includes the injection member coupled with the expansion packer, the connection line, the expansion fluid control valve and the grouting material control means to the drilling hole. Insertion process to insert; a fluid injection process of injecting a fluid into the expansion packer through the connection line after performing the insertion process; and a grouting material supply process of supplying the grouting material into the drilling hole while the expansion fluid control valve is in the closed state and the grouting material control means is in the open state.

Preferably, in the fluid injection process, the fluid is injected into the expansion packer through the connection line after the insertion process is performed, and the first on-off valve is in an open state and the second on-off valve is in an open state under the control of the controller. A first fluid injection process of injecting a fluid into the fluid injection chamber of the main packer body until the pressure sensed by the first pressure sensing means becomes a set pressure in a closed state, and the first fluid injection After the process is performed, the auxiliary main packer body until the pressure sensed by the second pressure sensing means becomes a set pressure in a state where the first on-off valve is in the closed state and the second on-off valve is in the open state. It may include a second fluid injection process of injecting the fluid into the auxiliary fluid injection chamber of the.

According to the soil nail construction apparatus and the construction method using the same according to the present invention, fluid is injected into the expansion packer through the opening and closing operation of the expansion fluid control valve and the grouting material control means simply in a state in which the soil nail construction apparatus is mounted in the drilling hole and Since the discharge operation can be performed and the grouting material can be injected, the construction can be done quickly and conveniently, and the airtight operation can be performed stably, thereby improving the workability and construction quality.

In particular, in the nail nail construction apparatus according to the present invention, since the fluid injection chamber of the expansion packer has a multi-layered structure, the fluid injection degree can be adjusted to be compatible with the drilling holes of various sizes.

In addition, since a number of binding grooves are formed on the outer surface of the reinforcing material body for the reinforcing material, when the grouting material is injected and cured, the bearing capacity can be increased while reducing the diameter of the steel pipe. It can reduce the construction cost.

1 is a view for explaining a pressurized nailing apparatus and method using a conventional double tube;
2 is a perspective view showing a nail nail construction apparatus according to a first embodiment of the present invention;
3 is an exploded perspective view showing the nail nail construction apparatus according to the first embodiment of the present invention;
4 is a cross-sectional view showing a nail nail construction apparatus according to a first embodiment of the present invention;
5 is a perspective view showing a reinforcing material applied to the nail nail construction apparatus according to the first embodiment of the present invention;
6 is a perspective view showing a nail nail construction apparatus according to a second embodiment of the present invention;
7 is an exploded perspective view showing a nail nail construction apparatus according to a second embodiment of the present invention;
8 is a cross-sectional view showing a nail nail construction apparatus according to a second embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

On the other hand, in each drawing, a detailed description of a configuration that can be easily recognized by a person skilled in the art from the general description and an action and effect thereof will be simplified or omitted. In addition, since the present invention has the characteristics of the nail nail construction apparatus and the construction method using the same, the related parts will be shown and described, and the description of the remaining parts will be simplified or omitted.

Figure 2 is a perspective view showing a nail nail construction apparatus according to a first embodiment of the present invention, Figure 3 is an exploded perspective view showing a soil nail construction apparatus according to a first embodiment of the present invention, Figure 4 is a first embodiment of the present invention Fig. 5 is a cross-sectional view showing a nail nail construction apparatus according to an example. Fig. 5 is a perspective view showing a reinforcing material applied to the nail nail construction apparatus according to the first embodiment of the present invention. The enlarged part is an enlarged view of the indicated part.

2 to 5, the nail nail construction apparatus according to the first embodiment of the present invention is a device to improve the workability and construction quality of nail nailing to be constructed on the ground such as a cut slope, and a reinforcing material ( 1), the injection member (2), the expansion packer (3), the connection line (4), it is composed of the expansion fluid control valve (5) and the grouting material control means (6).

The reinforcing material 1 is a component inserted into the perforated hole (a) formed in the ground, and it can be composed of reinforcing bars or a bundle of a plurality of strands, but in this embodiment, it is composed of a long rod-shaped member formed in a substantially pipe shape. have.

More specifically, the reinforcing material 1 has a pipe-shaped reinforcing material body 11 having a flow hole, and a structure similar to a corrugated pipe in which a plurality of binding grooves 12 recessed into the outer surface of the reinforcing material body 11 are formed. has been

When the reinforcing material 1 as described above is filled with the grouting material in the state inserted into the perforation hole (a), the grouting material is also filled into the binding groove 12 and cured. .

The injection member 2 is disposed at the inlet of the perforation hole (a) and is a component for injecting a grouting material or supplying a fluid such as air to the expansion packer 3, and a grouting supply device (not shown) is connected to one side. and the reinforcing material 1 is inserted on the other side. Here, the grouting supply device is a device commonly referred to as a pump car, and is connected to the front part of the injection member through a supply hose or the like to supply compressed air, grouting material, concrete mortar, etc. at high pressure.

In addition, the injection member 2 is formed with a line connection port 23 in a substantially socket shape for connection of the connection line 4 on the front outer surface thereof.

In addition, the injection member 2 is formed in a substantially pipe shape, and may be formed to have a relatively long length or to be adjustable in length so that the reinforcing material 1 can properly respond according to the extent to which the reinforcing material 1 is exposed to the outside of the cut slope.

The expansion packer 3 is a component installed to maintain airtightness between the inner surface of the perforation hole (a) and the reinforcing material. The hollow body 31 is formed of a material having elasticity and provided with a fluid injection chamber 37 therein. , a through hole 33 penetrating through the center of the hollow body 31 , and a connector 35 formed in the hollow body to be connected to the connection line 4 .

In addition, the expansion packer 3 can be selected and applied without limitation as long as it is a material that can withstand the injection pressure without flowing out of the fluid, for example, it may be formed of a rubber material or a woven paper in which an airtight coating layer is laminated on the outer surface.

Meanwhile, the expansion packer 3 may be provided with a plurality of press-fitting protrusions (not shown) that protrude from a portion corresponding to the outer circumferential surface of the hollow body 31 and are press-fitted into the inner surface of the perforation hole a during expansion.

In addition, in the expansion packer 3 , a plurality of protruding rings (not shown) protruding in a circular ring shape may be formed on the inner circumferential surface of the hollow body 31 corresponding to the portion of the through hole 33 . When the press-in protrusion (not shown) and the protrusion ring (not shown) are formed as described above, the expansion packer 3 is not easily separated to the outside of the perforation hole and is firmly fixed to the outside.

The connecting hose 4 is a line connected between the expansion packer 3 and the injection member 2 so that a fluid such as air or water moves, and the line connection port 23 of the injection member 2 and the expansion packer 3 It may be composed of a pipe or a hose connected between the connector 35 of the.

The expansion fluid control valve 5 is a component installed to control the flow of the fluid transferred to the connection line 4, and may be composed of various opening/closing valves such as a butterfly valve and a plug valve, but in this embodiment It consists of a ball valve in which a rotary lever 53 is coupled to a valve body 51 having a built-in ball as an opening and closing body.

In addition, when the expansion fluid control valve 5 is configured as an automatic valve equipped with an actuator that drives the opening and closing body so as to automatically control the opening and closing operation from a remote location, the workability can be further improved.

The grouting material control means 6 is a component installed in the injection member 2 to control the supply of the grouting material, and is opened when the grouting material is to be supplied into the drilling hole a through the inside of the injection member 2 . The operation is performed, and when the fluid is supplied to the expansion packer 3, it is composed of an opening/closing valve such as a ball valve that performs a closing operation.

In addition, the grouting material control means 6 opens and closes if it can block the flow of fluid in the direction of the injection member 2 in the process of supplying the fluid to the connection line 4 in addition to the valve for opening and closing such as the ball valve shown in FIG. 2 . A damper (not shown) having a plate may also be configured without limitation.

Meanwhile, a strainer (not shown) may be installed in the connection line 4 to prevent the inflow of foreign substances into the expansion packer 3 . For example, the strainer may be installed in a connection line 4 disposed between the expansion fluid control valve 5 and the expansion packer 3 as formed in a conventional structure with a built-in filtering net inside the strainer body.

Hereinafter, a construction method using the nail nail construction apparatus according to the first embodiment of the present invention will be briefly described.

When the construction method using the nail nail construction apparatus according to the first embodiment of the present invention described above will be described in detail with reference to FIGS. 2 to 5 , first, using a construction machine such as an excavator, field conditions, construction drawings, and specifications As shown in Fig. 4, the original ground is cut to have an angle determined by the performing the drilling hole forming step of drilling the drilling hole (a) by

When this drilling hole forming step is completed, the nail nail construction step of inserting the reinforcing material 1 into the drilling hole (a) and injecting and curing the grouting material is performed.

In the nail nail construction step, the reinforcing material (1) is inserted into the drilling hole, and as shown in FIG. 2, the expansion packer (3), the connection line (4), the expansion fluid control valve (5) and the grouting material control means (6) ) is inserted into the combined injection member (2).

And, when the injection member 2 is inserted so that the expansion packer 3 is positioned at the inlet of the drilling hole a, the supply hose (not shown) of the above-described grouting supply device (not shown) in front of the injection member 2 . ) and supply compressed air to inject it into the fluid injection chamber 37 of the expansion packer 3 through the connection line 4 . At this time, the expansion fluid control valve 5 is operated to be in an open state, and the grouting material control means 6 is operated to be in a closed state. In addition, in the above-described compressed air injection process, compressed air may be supplied by connecting a compressed air supply line (not shown) of a compressor (not shown) to the front of the injection member 2 in addition to the above-described grouting supply device.

As such, when compressed air is injected into the fluid injection chamber 37 of the expansion packer 3, the outer and inner peripheral surfaces of the hollow body 31 are expanded up and down by the injection pressure. At this time, the outer circumferential surface of the expansion packer 3 is closely pressed and pressed against the inner surface of the perforation hole a, and the inner circumferential surface presses the outer surface of the injection member 2 while the sealing state of the inlet portion of the perforation hole is stably maintained. can block

Then, operate the expansion fluid control valve 5 to be in the closed state and the grouting material control means 6 to be in the open state, and then operate so that the grouting material is supplied instead of compressed air through the supply hose of the grouting supply device When the re-supply process is performed, it is filled from the inside of the drilling hole to the inlet of the drilling hole while being injected through the injection member 2 and the reinforcing material 1 .

After that, when the grouting material injected into the drilling hole (a) is cured to some extent or curing is completed, the expansion fluid control valve (5) is operated to be in an open state to discharge and remove the compressed air contained in the expansion packer (3). .

As such, when the compressed air accommodated in the expansion packer 3 is removed, the volume of the hollow body 31 is contracted and becomes a free state, so it can be drawn out from the perforation hole (a) and separated and removed. And the removed expansion packer (3) can be repeatedly reused by inserting it into the drilling hole (a) for re-construction.

On the other hand, when the nail nail construction step as described above is completed, a foundation forming step is performed to prepare a foundation (not shown) for supporting a block forming a retaining wall or a precast panel (not shown). A lamination step of installing blocks or precast panels on the formed foundation is performed.

Then, after the lamination step is performed, the exposed part of the reinforcement (1) and the block or precast panel are connected and fixed in a tense state, and then a filler (not shown) is filled between the back surface of the block or precast panel and the cut slope (b). The construction of the retaining wall is completed when the compaction finishing stage is carried out.

Hereinafter, another embodiment according to the present invention will be described, but detailed descriptions of components similar to those of the above-described first embodiment will be omitted, and components having differences will be mainly described. In addition, in the following other embodiments, as long as it is an employable structure among the components shown in the first embodiment or the components shown in different embodiments, the detailed description or drawings will be omitted as it may be selectively applied.

Figure 6 is a perspective view showing a nail nail construction apparatus according to a second embodiment of the present invention, Figure 7 is an exploded perspective view showing a soil nail construction apparatus according to a second embodiment of the present invention, Figure 8 is a second embodiment of the present invention It is a cross-sectional view showing a nail nail construction apparatus according to an example.

6 to 8, the nail nail construction apparatus according to the second embodiment of the present invention includes a reinforcing material (1), an injection member (2), an expansion packer (3), a connection line (4), and an expansion fluid control valve. (5) and the grouting material control means (6) provided with the above-mentioned features as characterized in that it is configured to be compatible with the drilling holes (a) of various sizes while reinforcing the binding force of the expansion packer (3) 1 embodiment will be mainly described with respect to components having differences.

The expansion packer 7 is a main packer body 71 that is in close contact with the injection member 2, an auxiliary packer body 72 formed outside the main packer body 71, and a press-in protrusion formed on the auxiliary packer body 72 It consists of (73).

The main packer body 71 is a hollow body 711 formed of a material having elasticity and provided with a fluid injection chamber 717 therein, a through hole 713 penetrating through the center of the hollow body 711, and a connection line ( 4) is provided with a main connector 715 in the form of a socket formed in the hollow body 711 to be connected.

The auxiliary packer body 72 is laminated on the outer surface of the hollow body 711 and is connected to the auxiliary hollow body 721 and the connecting line 4 in which the auxiliary fluid injection chamber 727 is formed. An auxiliary connector 725 in the form of a socket is provided.

Here, the auxiliary packer body 72 may be composed of two or more layers, but in this embodiment, only one layer is additionally formed on the outer surface of the main packer body 71 .

The press-fitting protrusion 73 is formed in the auxiliary packer body 72 and is press-fitted into the inner surface of the perforated hole (a) when the auxiliary packer body 72 is expanded, and a plurality of pieces are formed on the outer surface of the auxiliary packer body 72 has been

The press-fitting protrusion 73 is composed of a wedge 731 formed in a substantially conical shape and a reinforcement pad 732 attached to the bottom surface of the wedge 731, and the reinforcement pad 732 is attached to the auxiliary packer body 72 by an adhesive. ) and fixed to the outer surface of the

On the other hand, the nail nail construction apparatus according to the second embodiment of the present invention is further provided with a strainer (9) for preventing the inflow of foreign substances into the expansion packer (7). Here, the strainer 9 is installed on the main connection line 41 and is composed of a general strainer widely used in the piping field.

In addition, the expansion fluid control valve 5 includes a first on/off valve 53, a second on/off valve 55 and It is composed of three on-off valves (57).

The connection line 4 is branched from the main connection line 41 and the main connection line 41 connected between the injection member 2 and the strainer 9, and the first opening/closing valve 53 and the main connection port 715 are It is composed of a first branch connection line 42 to be connected, and a second branch connection line 43 branched from the main connection line 41 and connected to the second on-off valve 55 and the auxiliary connector 725 .

The first opening/closing valve 53 is configured as an opening/closing valve such as a ball valve, and is installed in the first branch connection line 42 between the strainer 9 and the main connector 715 .

The second opening/closing valve 55 is configured as an opening/closing valve such as a ball valve, and is installed in the second branch connection line 43 formed between the strainer 9 and the auxiliary connector 725 .

The third opening/closing valve 57 is composed of an opening/closing valve such as a ball valve, and is installed in the main connection line 41 corresponding to the front side of the strainer 9 .

On the other hand, the nail nail construction apparatus according to the second embodiment of the present invention is installed in the first separation connection line 42 or the main packer body 71 to sense the first pressure to sense the internal pressure of the fluid injection chamber (717). The means 81, the second separation connection line 42 or the second pressure sensing means 82 installed in the auxiliary main packer body 72 to sense the internal pressure of the auxiliary fluid injection chamber 727, the first pressure sensing A control unit for controlling the driving of the first on-off valve 53, the second on-off valve 55, and the grouting material control means 6 according to the detection signal applied from the means 81 and the second pressure detection means 82 (not shown) is configured.

The first and second pressure sensing means 81 and 82 may be composed of various pressure sensors capable of sensing pressure such as a resonance type pressure sensor, a piezo type pressure sensor, and a capacitive type pressure sensor, and the first branch The pressure sensing units 811 and 821 installed on the connection line 42 and the second branch connection line 43, and signal transmission lines 812 and 822 for transmitting the signals sensed by the pressure sensing units 811 and 821 to the control unit (not shown) ) is composed of

Hereinafter, a construction method using a nail nail construction apparatus according to a second embodiment of the present invention will be briefly described.

The construction method using the nail nail construction apparatus according to the second embodiment of the present invention described above will be briefly described with reference to FIGS. 6 to 8, the construction method using the nail nail construction apparatus according to the first embodiment Similarly, since the retaining wall is constructed by performing the drilling hole forming step, the nail nail construction step, the foundation forming step, the laminating step, and the finishing step, only the steps having differences will be described in detail below.

In the nail nail construction step, the reinforcing material (1) is inserted into the drilling hole, and as shown in FIG. 2, the expansion packer (3), the connection line (4), the expansion fluid control valve (5) and the grouting material control means (6) ) performs an insertion process of inserting the combined injection member (2).

When the above-described insertion process is performed, the fluid injection process of connecting the supply hose of the grouting supply device (not shown) and supplying compressed air into the fluid injection chamber of the expansion packer 7 through the connection line 4 is performed. carry out

In this fluid injection process, first, the first on-off valve 53 is operated to be in an open state, and the second on-off valve 55 is operated to be in a closed state, and the fluid injection chamber 717 of the main packer body 71 is compressed. Air is injected, and the first fluid injection process is performed until the pressure sensed by the first pressure sensing means 81 becomes a set pressure under the control of the controller. When the main packer body 71 is expanded through this process, the press-fitting protrusion 73 formed in the auxiliary packer body 72 can be press-fitted into the inner surface of the perforated hole (a) to maintain a solid fixed state.

Then, after performing the first fluid injection process, when a cursor gap of the inner diameter of the drilling hole (a) is formed, the first on/off valve 53 is operated to be in a closed state, and the second on/off valve 55 is opened. A second fluid injection process of injecting compressed air into the auxiliary fluid injection chamber 727 of the auxiliary main packer body 72 is performed by manipulating it to remain in the state. This second fluid injection process is performed until the pressure sensed by the second pressure sensing means 82 becomes the set pressure under the control of the control unit, and the press-in protrusion 73 formed in the auxiliary packer body 72 is formed in the perforation hole ( It should be press-fitted into the inner surface of a).

When the fluid injection process as described above is performed, the third on/off valve 57 is operated to be in the closed state, and then the grouting material supply process is performed after the operation is performed so that the grouting material is supplied instead of compressed air through the supply hose of the grouting supply device. When this is performed, it is injected through the injection member 2 and the reinforcing material 1 and is filled from the inside of the drilling hole to the inlet of the drilling hole.

After that, when the grouting material injected into the perforation hole (a) is cured to some extent or the curing is completed, at this time, the first on/off valve 53, the second on/off valve 55 and the third on/off valve 57 are placed in an open state. A separation and removal process in which the expansion packer 7 is contracted by manipulating the main packer body 71 and the compressed air contained in the auxiliary main packer body 72, and then separating and removing from the perforated hole (a). can be performed. The expansion packer 7 removed in this way can be repeatedly reused by inserting it into the drilling hole (a) for re-construction.

Although the configuration and operation of the nail nail construction apparatus and the construction method using the same have been described above according to an embodiment of the present invention, this is an example and those of ordinary skill in the art do not deviate from the technical spirit of the present invention. It will be understood that substitutions and variations of some of the embodiments described above are possible within the scope.

Therefore, it should be understood that the protection scope of the present invention extends to the invention described in the claims and equivalents thereof.

1: Reinforcement material 11: Reinforcement material body
12: binding groove 2: injection member
3,7: expansion packer 31: hollow body
33: through hole 35: connector
4: Connection line 41: Main connection line
42: first branch connection line 43: second branch connection line
5: Expansion fluid control valve 6: Grouting re-control means
71: main packer body 711: hollow body
713: through hole 715: main connector
72: auxiliary packer body 721: auxiliary hollow body
725: auxiliary connector 73: press-fit protrusion
81: first pressure sensing means 82: first pressure sensing means
9: Strainer a: Drill hole
b: cut slope

Claims (9)

In the nail nail construction apparatus,
Reinforcing material inserted into the perforated hole formed in the ground;
an injection member disposed at the inlet of the perforation hole;
an expansion packer installed to maintain airtightness between the inner surface of the drilling hole and the reinforcing material;
a connection line connected between the expansion packer and the injection member; and
Soil nail construction apparatus comprising a; expansion fluid control valve installed on the connection line.
According to claim 1,
Soil nail construction apparatus comprising a grouting material control means installed on the injection member to control the supply of the grouting material..
3. The method of claim 2,
Soil nail construction apparatus comprising a strainer installed on the connection line.
3. The method of claim 2,
The expansion packer,
A nail nail construction apparatus comprising: a hollow body having a fluid injection chamber formed therein; a through hole penetrating through the center of the hollow body; and a connector formed in the hollow body to be connected to the connection line.
3. The method of claim 2,
The expansion packer,
a main packer body having a hollow body having a main fluid injection chamber formed therein, a through hole penetrating through the center of the hollow body, and a main connector formed in the hollow body to be connected to the connection line;
an auxiliary hollow body laminated on the outer surface of the hollow body and having an auxiliary fluid injection chamber therein; and
A nail nail construction apparatus comprising a; a plurality of press-fitting protrusions formed on the auxiliary packer body and press-fitted into the inner surface of the perforation hole during expansion.
6. The method of claim 5,
The connection line includes a main connection line connected to the injection member, a first branch connection line branched from the main connection line and connected to the main packer body, and a second branch connection line branched from the main connection line and connected to the auxiliary packer body. including branch connection lines,
The expansion fluid control valve includes a first opening/closing valve installed in the first branch connection line, a second opening/closing valve installed in the second branch connection line, and a third opening/closing valve installed in the main connection line,
Soil nail construction apparatus comprising a strainer installed on the main connection line.
7. The method of claim 6,
first pressure sensing means for sensing the internal pressure of the fluid injection chamber;
a second pressure sensing means for sensing the internal pressure of the auxiliary fluid injection chamber; and
a control unit for controlling the driving of the first on/off valve, the second on/off valve, the expansion fluid control valve, and the grouting material control unit according to a sensing signal applied from the first pressure sensing unit and the second pressure sensing unit; Soil nail construction device comprising a.
According to claim 1,
The reinforcing material comprises a pipe-shaped reinforcing material body having a flow hole, and a plurality of binding grooves recessed into the outer surface of the reinforcing material body.
In the construction method using the nail nail construction device,
The nail nail construction step of inserting the reinforcing material into the drilling hole and injecting and curing the grouting material using the nail nail construction apparatus of claim 7 is performed,
The soil nail construction step may include an insertion process of inserting the injection member to which the expansion packer, the connection line, the expansion fluid control valve and the grouting material control means are coupled into the drilling hole;
After performing the insertion process, the fluid is injected into the expansion packer through the connection line, and the first on-off valve is in an open state and the second on-off valve is in a closed state under the control of the controller. A first fluid injection process of injecting fluid into the fluid injection chamber of the main packer body until the pressure sensed by the first pressure sensing means becomes a set pressure, and the first opening/closing after performing the first fluid injection process With the valve in the closed state and the second on-off valve in the open state, the fluid is injected into the auxiliary fluid injection chamber of the auxiliary main packer body until the pressure sensed by the second pressure sensing means becomes the set pressure. a fluid injection process comprising a second fluid injection process;
A grouting material supply process of supplying the grouting material into the drilling hole while the expansion fluid control valve is in the closed state and the grouting material control means is in the open state; construction method used.

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