JP5062785B2 - Pipe repair structure - Google Patents

Description

  The present invention relates to a pipe structure for repairing an inner wall of a pipe using a structure of a pipe through which water containing mud or solid matter flows, such as a large-diameter sewer pipe or a rainwater pipe, and an inner surface member carried into the pipe. More particularly, the present invention relates to a pipe structure and a pipe repair structure suitable for a horseshoe tube or a rectangular tube having a flat bottom.

  As a method for repairing an existing pipeline such as an aged sewer pipeline, a method of covering the entire inner surface of the pipeline with an inner surface member (lining material) is known (see, for example, Patent Literature 1 to Patent Literature 2). .)

  In addition, as such a repair method, particularly regarding repair of a large-diameter pipe that can be operated by a person entering the pipeline, the present applicants do not need a support work at the time of repair, simplify the construction and the construction period. Pipeline repair method (Patent Document 3) that can realize shortening, repair method that can sufficiently reinforce deteriorated pipes and deformed pipes that cannot be expected in strength, and pipes obtained by the method The repair structure (Patent Document 4) is proposed.

The pipe repair method as described above is such that the inner surface member is continuous in the pipe length direction of the pipe line, so that there is no joint in the pipe length direction of the pipe line, and the flowability of the in-pipe matter is improved. However, since the total length of the inner surface member increases as the repair length of the pipe increases, a difficult case has arisen in transportation or manufacturing equipment.

  Further, in the pipe repair structure using the frame-shaped reinforcing body, when the curable filler is injected, the staying water or air in the pipe is caught between the inner surface member and the pipe wall surface near the bottom of the pipe. In some cases, an unfilled portion of the curable filler is formed. In particular, pipes with a flat bottom, such as horseshoe-shaped pipes and rectangular pipes (box culverts), have a lot of stagnant water or air between the inner surface member and the wall of the pipe near the bottom. There is a high risk of being formed.

  Therefore, the present applicants arrange a fixed-length inner member having a fixed length in the pipe tube length direction in contact with the longitudinal direction and the width direction, and integrate them in the pipe line. In addition to solving problems in transportation or manufacturing equipment, a proposal has been made regarding a pipe repair structure that is easy to handle and work at a construction site (Patent Document 5).

  In addition, the inner edge of the reinforcing body installed in the gap between the wall surface of the pipe line and the inner surface member covering it is provided with a notch that allows the curable filler to pass in the pipe tube length direction. A repair structure of a pipe line that smoothes the flow in the pipe tube length direction and prevents the occurrence of unfilled portions of the curable filler is proposed (Patent Document 6).

  9 to 12 are diagrams for explaining the outline of the conventional pipe repair structure according to these proposals. In this pipe repair method, a hollow frame-shaped reinforcing body made of a highly rigid material (for example, steel) is assembled in the pipe, and an inner surface member (lining material) made of resin, metal, or the like is placed inside the reinforcing body. After the attachment, the space formed by the inner surface member and the pipe wall surface is filled with a curable filler (backfill material).

  For example, in the case of an existing pipe having a circular cross section as in the example, first, the reinforcing member 2 having a shape substantially along the pipe inner wall 1a is assembled inside the existing pipe 1 as shown in FIG. The reinforcing member 2 is composed of a plurality of divided reinforcing members (in this example, three divided reinforcing members 2a, 2b, 2c) carried in from a manhole or the like, and substantially along the pipe inner wall 1a as a whole. Assembled in a ring shape. A plurality of fitting recesses (fitting portions 2p) for fitting a fitting member 11 and a regular inner surface member 30 to be described later are formed at a predetermined pitch in the circumferential direction inside the pipe line of the reinforcing member 2. In addition, unevenness that is continuously continuous in the circumferential direction is formed on the outer edge.

  In addition, the ring-shaped reinforcing member 2 has pipe holes 2q penetrating in the cylinder length direction at regular intervals in the circumferential direction, and at the stage when the plurality of ring-shaped reinforcing members 2 are formed, These ring-shaped reinforcing members 2 are connected and integrated at a constant interval in the tube length direction of the existing pipe line by connecting members (not shown) made of bolts, nuts, and the like to form a hollow frame-shaped reinforcing body as a whole. The In addition, a notch 2r communicating with each through-hole 2q is formed at the radially inner edge of the reinforcing member 2, and even when the fixed inner member 30 is attached, the inner edge of the reinforcing member 2 in contact with the inner member 30 A clearance communicating with the existing pipe tube length direction is formed in the vicinity.

  Next, the fitting member 11 is attached to each of the fitting portions 2p of the reinforcing member 2 in parallel with each other along the tube length direction of the existing pipe line 1, and the fixed-length inner surface member is interposed via each of the fitting members 11. 30 is attached. As shown in FIG. 10, the regular inner surface member 30 is a strip-shaped body having a uniform length, for example, a left and right symmetrical uniform cross section having a length of about 5 m. The protrusions 30a and 30b for fitting projecting to the side have a shape integrally formed. The distance between the fitting convex portions 30a and 30b is equal to the distance (pitch) between the fitting portions 2p formed on the inner side of the reinforcing member 2, and one of the fitting convex portions 30a of the inner surface member 30 adjacent to each other. Each of the other inner surface members 30 is inserted into the opening of the fitting member 11 in a state where the fitting convex portion 30b is abutted with each other. In some cases, a sealing member 12 for waterproofing is interposed between the fitting convex portions 30 a and 30 b and the fitting member 11.

  Thereafter, as shown in FIGS. 11 and 12, the curable filler 3 is injected into the space between the fixed inner member 30 and the pipe inner wall 1a. The injected curable filler 3 fills the space defined by the ring-shaped reinforcing member 2 in the cylinder length direction from the bottom side of the existing pipe line, by the unevenness of the outer edge of the reinforcing member 2. From the formed clearance or the clearance formed in the vicinity of the inner edge of the reinforcing member 2 by the notch 2r, the fluid sequentially flows into the next gap section.

Japanese Patent No. 2614669 Japanese Patent No. 2742986 JP 2002-120290 A JP 2001-311387 A JP 2002-310378 A JP 2003-328430 A

By the way, it is known that solid filth called sedimentation deposits on the bottom of sewer pipes and rainwater pipes, and as a conventional request, pipes that allow water containing mud and solids to flow down are used. Therefore, there is a demand for a structure in which sedimentation does not accumulate as much as possible, and a structure in which the sedimentation can be easily cleaned (removed).

However, pipes with a flat bottom, such as horseshoe tubes and rectangular tubes (box culverts),
There is a tendency that the flow rate of the piped material is low, solids tend to accumulate, and more sedimentation occurs than a pipe having a circular cross section.

The present invention has been made in view of such circumstances, and provides a pipeline and a pipeline repair structure in which solid matter is difficult to deposit on the bottom of the pipeline and can be easily removed even when deposited. It is aimed.

  In order to solve the above-mentioned problems, the pipe repair structure of the invention according to claim 1 is formed by assembling a split reinforcing member provided with fitting portions at a predetermined pitch inside along the inner wall of the pipe. A plurality of reinforcing members are arranged in the tube length direction of the pipe line, and these reinforcing members are integrated with each other by a connecting member to form a hollow frame-shaped reinforcing body, and inside the pipe line of the reinforcing body A fixed-length inner member having a fixed length in the pipe tube length direction with a pitch width of the fitting portion is disposed in contact with the longitudinal direction and the width direction. In the pipe repair structure in which a curable filler is filled between the inner wall and the inner wall, the corners at both ends in the width direction on the pipe inner surface of the fixed inner member are formed in an R shape. It is attached.

  The present invention is intended to reduce the resistance to flowing water and achieve the intended purpose by forming an uneven shape (riblet) following the flow of water on the inner surface of the pipe. .

  That is, by forming a riblet consisting of a plurality of grooves or ribs in the pipe tube length direction at the bottom of a pipe through which water containing mud and solids flows, such as a large-diameter sewer pipe or rainwater pipe, The frictional resistance against is reduced. Therefore, the pipe line of the present invention can be a pipe line in which solid matter hardly accumulates at the bottom of the pipe line and can be easily removed even when it is deposited.

  Specifically, in the invention according to claim 1, a pipe repair structure in which a fixed-length inner member having a predetermined width and a fixed length in the pipe tube length direction is connected in the longitudinal direction and the width direction. By forming the corners at both ends in the width direction on the inner surface of the pipe of each fixed-length inner surface member in an R shape, a plurality of pieces extending along the cylinder length direction on the inner surface of the pipe after repair Are formed at the joints in the width direction of the fixed inner member, and the riblet effect can be obtained.

  Moreover, in the invention which concerns on Claim 2, chamfering is given to the corner | angular part of the both ends of the width direction in the pipe inner surface of said fixed-length inner surface member. Even with this configuration, a concave portion extending along the tube length direction is formed at the joint portion in the width direction of the fixed inner surface member on the inner surface of the pipeline after repair, and the riblet effect equivalent to the above is achieved. Obtainable.

  In addition, the maximum depth of the recessed part formed by the R shape formed in the corner | angular part of the width direction both ends of a fixed-length inner surface member as mentioned above, or the chamfering process given to the same corner part is 0.5-5.0 mm. It is desirable to be.

  Here, the riblet requires a certain level of height difference between the concave and convex shapes. However, in the case of a sewer pipe, a rainwater pipe, etc., the riblet may have a structure that is easy to clean (remove) the accumulated sand. Therefore, the height difference is preferably suppressed to 5 mm or less.

On the other hand, the invention according to claim 3 aims to both reduce the mounting work of the inner surface member and prevent the occurrence of unfilled sites in the curable filler, both of obtaining the above riblet effect. A fixed-length inner member having a fixed length in the pipe tube length direction with a pitch width of the fitting portion is disposed in contact with the longitudinal direction and the width direction on the inner side of the reinforcement body. In a pipe repair structure in which a curable filler is filled between the inner surface member and the inner wall of the pipe, the fixed inner member is formed with a width twice the pitch of the fitting portions. In addition, an engagement portion that protrudes toward the outside of the pipe line and engages with the fitting portion is formed at the center in the width direction of the double-width standard inner surface member, and the double-width standard The corners at both ends in the width direction on the inner surface of the inner surface member are formed in an R shape.

  Further, in the invention according to claim 5, as described above, the reinforcing member formed by assembling the divided reinforcing member provided with the fitting portions on the inside at a predetermined pitch along the inner wall of the pipe is A plurality of these reinforcing members are arranged in the cylinder length direction, and the reinforcing members are integrated with each other by a connecting member to form a hollow frame-shaped reinforcing body, and the pitch of the fitting portion is formed inside the reinforcing pipe. A fixed-length inner member having a certain length in the tube tube length direction is disposed in contact with the longitudinal direction and the width direction, and is hardened between the fixed inner member and the inner wall of the conduit. In the pipe repair structure filled with the conductive filler, the fixed inner member is formed to be twice as wide as the pitch of the fitting portion, and the double fixed width inner member At the center in the width direction, there is an engaging part that protrudes toward the outside of the pipe line and engages with the fitting part. Is, and, at the corners of the opposite widthwise ends in line the inner surface of the standard dimension inside member of the double-width, is characterized in that chamfering processing is given.

  According to the configurations of the third and fourth aspects, the number of work steps for constructing the inner surface member can be reduced. Further, the engagement portion provided in the center in the width direction of the double-width inner surface member prevents the inner surface member from being lifted by the injection pressure even when the curable filler is injected. The gap formed between the reinforcing member and the fitting part of the reinforcing body allows smooth flow of the curable filler in the longitudinal direction of the pipe without the need to provide a cut or the like formed on the inner edge of the conventional reinforcing body. become. Therefore, the pipe repair structure according to the third and fourth aspects of the present invention has less stagnant water or air between the inner surface member and the wall surface of the pipe, and the unfilled portion of the curable filler at the bottom of the pipe. Occurrence can be prevented.

  And the riblet equivalent to the above is formed by forming the corners at both ends in the width direction of the inner surface of the pipe of the double-width regular inner surface member into an R shape or chamfering the same corner portion. There is an effect.

  The depth of the concave portion formed by the R shape or chamfering formed at the corners at both ends in the width direction of the double-width regular inner member as described above is preferably 0.5 to 5.0 mm as described above.

  In the invention according to claim 5, a groove or rib continuous in the longitudinal direction is formed at the center in the width direction of the inner surface of the pipe line of the double-width standard inner member in the invention according to claim 3 or 4. It is characterized by being. According to this configuration, between the concave portion formed by the R shape formed in the joint portion in the width direction of the double-width standard inner member or the concave portion formed by chamfering formed in the same portion, along with the cylinder length direction Therefore, an effective riblet effect can be obtained.

  According to the present invention, concave portions along both ends of the fixed-length inner surface member are formed on the surface of the pipeline after repair, and the riblet effect makes it difficult for solid matter to deposit and even when deposited, it is easy to remove. Become. In particular, even in a pipeline such as a horseshoe tube or a rectangular tube (box culvert) where the bottom is flat and the flow rate of the pipe is low, the flow ability can be improved.

It is sectional drawing of the pipe radial direction which shows the repair structure of the pipe line in 1st Embodiment of this invention. It is the A section enlarged schematic diagram of FIG. It is a figure which shows the example of a cross-sectional shape of the fixed inner surface member 10 in 1st Embodiment of this invention. It is a figure which shows the other cross-sectional shape example of the fixed-length inner surface member 10 in 1st Embodiment of this invention. It is sectional drawing of the pipe diameter direction which shows the repair structure of the pipe line in 2nd Embodiment of this invention. It is the B section enlarged schematic diagram of FIG. It is a figure which shows the cross-sectional example of the fixed-length inner surface member 20 in 2nd Embodiment of this invention. It is a figure which shows the other cross-sectional shape example of the fixed-length inner surface member 20 in 2nd Embodiment of this invention. It is explanatory drawing which shows the repair method of the conventional pipe line, and is sectional drawing of the pipe radial direction which shows the state which assembled the reinforcement member 2 inside the existing pipe line 1. FIG. It is an external appearance perspective view of the fixed inner surface member used for the conventional pipe line repair method. It is sectional drawing of the pipe radial direction which shows the repair structure of the conventional pipe line. It is the C section enlarged schematic diagram of FIG.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view in the pipe radial direction showing a pipe repair structure according to the first embodiment of the present invention, and FIG. 2 is an enlarged schematic view of part A of FIG. Moreover, FIG. 3 is a figure which shows the example of the cross-sectional shape of the fixed-length inner surface member 10 in this 1st Embodiment. In addition, the same code | symbol is attached | subjected to the structural member which has a function similar to a prior art example, and detailed description is abbreviate | omitted.

  The pipe repair method according to the first embodiment also includes a split reinforcement member made of a highly rigid material (for example, steel) and provided with fitting portions 2p at a predetermined pitch inside the pipe. Assembling along 1a, the reinforcing member 2 substantially along the cross-sectional shape of the pipe line 1 is formed. A plurality of the reinforcing members 2 are arranged in the tube length direction of the pipe line 1 and these reinforcing members 2 are integrated with each other by a connecting member (not shown) to construct a hollow frame-shaped reinforcing body.

  Next, the fitting member 11 is attached to each of the fitting portions 2p of the reinforcing member 2 in parallel with each other along the tube length direction of the existing pipe line 1, and one fitting convex portion 10a of the adjacent inner surface member 10 and The fitting member 10 is inserted into the opening of the fitting member 11 via the seal member 12 in a state where the fitting convex portion 10 b of the other inner surface member 10 is abutted. Thereafter, the curable filler 3 is injected into the gap between the fixed inner member 10 and the pipe inner wall 1a.

  The pipe repair structure in the present embodiment is different from the conventional repair structure in that the corners 10d at both ends in the width direction on the pipe inner surface 10c of the fixed inner member 10 are formed in an R shape as shown in FIG. This is the point.

  With this configuration, the inner surface of the conduit in the present embodiment is formed at the corners 10d at both ends in the width direction of the fixed inner member 10 at the joints in the width direction of the adjacent fixed inner members 10 in the embodiment. An R-shaped groove is formed along the cylinder length direction. That is, a concavo-convex shape (riblet) following the flow of water is formed. Therefore, the pipeline in the present embodiment should be a pipeline that can maintain a smooth flow of the inside of the pipe even after repair, and that it is difficult for solid matter to accumulate on the bottom of the pipe, and that it is easy to remove even if it accumulates. Can do.

  In particular, a pipe with a flat bottom, such as a horseshoe tube or a rectangular tube (box culvert) as in this example, has a low flow speed of the pipe and tends to accumulate sand. In addition, by forming a riblet structure on the inner surface of the pipe line, it is possible to improve the flow-through ability of the inside of the pipe.

  The riblet structure may be configured by chamfering corner portions 10d at both ends in the width direction on the pipe inner surface 10c of the fixed inner member 10 as shown in FIG. Even if the member is used, the inner surface of the pipe line after repair is applied to the corner portions 10d at both ends in the width direction of the fixed inner member 10 at the joints in the width direction of the adjacent fixed inner members 10 in the width direction. A concave portion formed by the chamfered portion is formed along the pipe tube length direction, and a riblet effect similar to the above is obtained.

Next, a second embodiment of the present invention will be described.
FIG. 5 is a cross-sectional view in the pipe radial direction showing the pipe repair structure according to the second embodiment of the present invention, and FIG. 6 is an enlarged schematic view of part B of FIG. Moreover, FIG. 7 is a figure which shows the example of the cross-sectional shape of the fixed-length inner surface member 20 in this 2nd Embodiment.

  As in the first embodiment, the pipe repair method according to the present embodiment also substantially follows the cross-sectional shape of the pipe 1 using the reinforcing member 2 provided with the fitting portions 2p at a predetermined pitch inside the pipe. After constructing a hollow frame-shaped reinforcing body and attaching a resin-made inner surface member 20 inside the reinforcing body, a curable filler is formed in a space formed by the inner surface member 20 and the pipe inner wall 1a. 3 is filled.

  The feature of the pipe repair structure in the present embodiment is that, as shown in FIG. 6, the fixed inner member 20 is formed to have a width twice as large as the pitch of the fitting portions 2 a of the reinforcing member 2. An engaging portion 20c that protrudes toward the outside of the pipe line and engages with the fitting portion 2a is formed at the center of the inner surface member 20 in the width direction.

  Further, as shown in FIG. 7, the corners 20f and 20f at both ends in the width direction on the pipe inner surface 20d of the double-width standard inner member 20 are formed in an R shape and are formed in the center 20e in the width direction. Has a groove.

  With the above configuration, even when the curable filler 3 is injected, the inner surface member 20 is prevented from being lifted by the injection pressure, and a gap is formed between the engaging portion 20c and the fitting portion 2p of the reinforcing member 2. Thereby, the flow of the curable filler 3 in the pipe tube length direction becomes smooth. Therefore, the pipe repair structure according to the present embodiment has less stagnant water or air between the inner surface member 20 and the pipe inner wall 1a, and has a flat bottom such as a horseshoe tube or a rectangular tube (box culvert). Even in the pipeline, it is possible to prevent the occurrence of an unfilled portion of the curable filler 3 at the bottom of the pipeline.

  In addition, the inner surface of the pipe formed by this repair method includes a concave portion formed in an R shape formed at corners 20f and 20f at both ends in the width direction of the inner surface 20d of the pipe inner surface of the fixed inner member 20, and a fixed inner surface. A riblet effect can be produced by the groove formed in the central portion 20e of the member 20 in the width direction. Therefore, the pipe repair structure according to the present embodiment also makes it difficult for solids to deposit on the bottom of the pipe and can be easily removed even when deposited, and the bottom is a flat pipe. It becomes possible to improve the flow capacity of the pipe.

  Further, in the above pipe line repair structure, the fixed inner member 20 to be attached at the construction site has a width twice that of the conventional product, so that the labor of the attachment work can be reduced. Moreover, since the filling of the curable filler 3 is performed smoothly, it is not necessary to provide the cut (reference numeral 2r in FIG. 9) formed in the inner edge of the conventional reinforcing member. Furthermore, by not providing this notch, it is not necessary to consider the strength reduction due to the notch, and the width of the reinforcing member 2 in the pipe radial direction and the thickness in the pipe cylinder length direction are made narrower and thinner than the conventional one. While being able to design, the shape process becomes easy. Therefore, the repair structure of the pipe line in this embodiment can reduce the cost compared with the past by these effects.

  As in the first embodiment, even when the double-width fixed inner member 20 is used, as shown in FIG. 8, the corners at both ends in the width direction on the pipe inner surface 20d of the fixed inner member 20 are used. Even if chamfering is performed on 20f and 20f, the chamfering process forms a recess due to the chamfered portions of both inner surface members 20 at the joints in the width direction of the adjacent regular inner surface members 20. The riblet effect equivalent to the case of forming the corners 20f, 20f at both ends in the width direction on the pipe inner surface 20d of the fixed inner member 20 in an R shape can be achieved. It is also effective to form a groove in the center 20e in the width direction of the inner surface of the duct.

  In the above two embodiments, the repair structure of the pipe line using the resin-made fixed-length inner surface member is taken as an example, but the inner surface member in the present invention is not particularly limited to resin, What is necessary is just to form with hard and water-resistant materials, such as a metal.

Furthermore, the present invention can be applied to pipes having various cross-sectional shapes, and is also applicable to newly installed pipes in which pipe inner surfaces are constructed using inner surface members in addition to existing repaired pipe lines. be able to.

DESCRIPTION OF SYMBOLS 1 Pipe line 1a Pipe inner wall 2 Reinforcement member 2a, 2b, 2c (Division | partition) Reinforcement member 2p Fitting part 2q Through-hole 2r Cut 3 Curing filler 10 Fixed inner surface member 10a, 10b Fitting convex part 10c Inner pipe line Surface 10d Corner portion 11 Fitting member 12 Seal member 20 Fixed-length inner surface member 20a, 20b Fitting convex portion 20c Engaging portion 20d Pipe inner surface 20e Central portion 20f Corner portion 30 Fixed-length inner surface member 30a, 30b Fitting convex portion

Claims (5)

A plurality of reinforcing members are assembled in the tube length direction of the pipe line, and a plurality of reinforcing members are assembled along the inner wall of the pipe line, and the reinforcing members are connected members. To form a hollow frame-shaped reinforcing body, and a constant length in the pipe tube length direction is set on the inner side of the pipe of the reinforcing body at the pitch width of the fitting portion. In the repair structure of the pipe line in which the inner surface member is disposed in contact with the longitudinal direction and the width direction, and between the inner wall of the fixed length inner surface member and the pipe line, a curable filler is filled.
A repair structure for a pipe, wherein corners at both ends in the width direction on the pipe inner surface of the fixed inner member are formed in an R shape. A plurality of reinforcing members are assembled in the tube length direction of the pipe line, and a plurality of reinforcing members are assembled along the inner wall of the pipe line, and the reinforcing members are connected members. To form a hollow frame-shaped reinforcing body, and a constant length in the pipe tube length direction is set on the inner side of the pipe of the reinforcing body at the pitch width of the fitting portion. In the repair structure of the pipe line in which the inner surface member is disposed in contact with the longitudinal direction and the width direction, and between the inner wall of the fixed length inner surface member and the pipe line, a curable filler is filled.
A repair structure for a pipe, wherein chamfering is applied to corners at both ends in the width direction on the pipe inner surface of the fixed inner member. A plurality of reinforcing members are assembled in the tube length direction of the pipe line, and a plurality of reinforcing members are assembled along the inner wall of the pipe line, and the reinforcing members are connected members. To form a hollow frame-shaped reinforcing body, and a constant length in the pipe tube length direction is set on the inner side of the pipe of the reinforcing body at the pitch width of the fitting portion. In the repair structure of the pipe line in which the inner surface member is disposed in contact with the longitudinal direction and the width direction, and between the inner wall of the fixed length inner surface member and the pipe line, a curable filler is filled.
The fixed inner member is formed to have a width twice as large as the pitch of the fitting portion, and the double width fixed inner member protrudes toward the outside of the pipe line at the center in the width direction. An engagement portion that engages with the fitting portion is formed, and corners at both ends in the width direction on the inner surface of the pipe of the double-width inner surface member are formed in an R shape. Repair structure of the pipeline to be. A plurality of reinforcing members are assembled in the tube length direction of the pipe line, and a plurality of reinforcing members are assembled along the inner wall of the pipe line, and the reinforcing members are connected members. To form a hollow frame-shaped reinforcing body, and a constant length in the pipe tube length direction is set on the inner side of the pipe of the reinforcing body at the pitch width of the fitting portion. In the repair structure of the pipe line in which the inner surface member is disposed in contact with the longitudinal direction and the width direction, and between the inner wall of the fixed length inner surface member and the pipe line, a curable filler is filled.
The fixed inner member is formed to have a width twice as large as the pitch of the fitting portion, and the double width fixed inner member protrudes toward the outside of the pipe line at the center in the width direction. An engagement portion that engages with the fitting portion is formed, and chamfering is performed on corner portions at both ends in the width direction on the inner surface of the pipe line of the double-width fixed inner member. Repair structure of the pipeline to be.   5. The conduit according to claim 3, wherein a groove or a rib that is continuous in the longitudinal direction is formed at the center in the width direction of the inner surface of the conduit of the double-width regular inner member. Repair structure.

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