JP4888940B2 - Pipe repair structure - Google Patents

Description

The present invention, sewerage line and rainwater pipes etc. having a large diameter, relates to repair the structure of the conduit in which the water containing mud and solid repairing a conduit inner wall with an inner surface member that is carried in the flow Ru conduit, further More specifically, the present invention relates to a pipe structure and a pipe repair structure suitable for a horseshoe-shaped pipe or a rectangular pipe 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.

Repairing method having the above line, by, are continuous with the inner surface member to the cylindrical length direction of the pipe, there is no joint portion to the cylindrical length direction of the conduit, to improve the discharge capacity of the pipe material Although there is an advantage that the length of the pipe can be repaired, the total length of the inner surface member increases as the repair length of the pipe increases. This has caused a difficult case 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).

  FIG. 11 to FIG. 14 are diagrams for explaining the outline of a 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 line 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 line 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. 12, the regular inner surface member 30 is a belt-like body having a uniform length, for example, about 5 m, and a symmetric uniform cross section. 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 FIG. 13 and FIG. 14, the curable filler 3 is injected into the gap 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-shaped pipes and rectangular pipes (box culverts), have a lower flow rate of the material in the pipes and tend to accumulate solids. There was a case where many occurred.

The present invention has been made in view of such circumstances, and its object is solid and hardly deposited in the conduit bottom and removed even when deposited to provide a repair structure for easy conduit .

In order to achieve the above object, the pipe repair structure according to the first aspect of the present invention is the inner surface of the reinforcement member disposed substantially along the inner wall of the pipe, and the inner surface continuous in the pipe tube length direction. In a pipe repair structure in which a member is attached and a curable filler is filled between the inner surface member and the inner wall of the pipe, the reinforcing member is fitted inside at a predetermined pitch. The divided reinforcing member provided with the portion is assembled along the inner wall of the pipe, and a plurality of the reinforcing members are arranged in the tube length direction of the pipe, and these reinforcing members are integrated with each other by the connecting member. A hollow frame-shaped reinforcing body is formed, and on the inner side of the pipe of the reinforcing body, a fixed-length inner member having a fixed length in the pipe tube length direction with the width of the pitch of the fitting portion is provided. It is arranged in contact with the direction and the width direction, and, of these Blank inside member Chi, pipeline inner surface of the inside member which is located at the bottom of at least the conduit is characterized by being formed in a concave or convex in the width direction.

  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 bottom 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 repair structure of the present invention makes it difficult for solids to deposit on the bottom of the pipe and makes it easy to remove the pipe even when it is deposited.

Specifically, the constant length of the fixed-length inside member to the conduit tube length direction at a predetermined width, Te repair structures smell conduit used in conjunction in the longitudinal direction and the width direction, the standard dimension inside member The inner surface of the pipe is formed in a concave or convex shape in the width direction.

That is , the pitch width of the inner surface members arranged in the pipe tube length direction (that is, the water flow direction) is used as a riblet-shaped repeat width. That is, in the case of a repair method using a regular inner member with a predetermined pitch width, by making the individual surfaces of the regular inner member disposed at the bottom of the pipe line concave or convex in the width direction, The riblet effect described above can be achieved.

  With this configuration, a smooth flow of the inside of the pipe can be maintained, and a solid pipe can be easily deposited on the bottom of the pipe, and can be easily removed even when it is deposited.

In addition, the maximum depth of the concave shape or the maximum height of the convex shape on the inner surface of the pipe line in the fixed inner surface member is 0.5 to the virtual reference plane that connects the vertices of the corners at both ends in the width direction. It is desirable that it be 5.0 mm (claim 2 ).

  The riblet needs to have a certain height difference between its concave and convex shapes, but in the case of sewer pipes, rainwater pipes, etc., it is required to have a structure that is easy to clean (remove) the accumulated sand. The height difference is preferably suppressed to 5 mm or less.

Here, the pipe tube can also be formed by forming the corners at both ends in the width direction on the inner surface of the pipe of the fixed inner member having the predetermined pitch width as described above, or by chamfering the corners. A concave portion along the long direction will be formed, and the same riblet effect as described above can be achieved. In addition to making the inner surface of the pipe line of each standard inner surface member concave or convex, a standard It is also effective to form both ends in the width direction of the pipe inner surface of the inner surface member into an R shape (Claim 3), or to chamfer the corner portion (Claim 4).

On the other hand, in addition to the above riblet effect, the invention according to claim 5 is intended to achieve reduction of the attachment work of the inner surface member and prevention of occurrence of unfilled portions in the curable filler. 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 inside the body pipe line. 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 to have a width twice the pitch of the fitting portion. 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 inner surface of the pipe surface of the inner surface member is recessed in the width direction across the center of the inner surface in the width direction. Or characterized in that it is formed in a convex shape.

With this configuration, it is possible to reduce the number of work steps when constructing the inner surface member. 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. and a gap formed between the fitting portion of the reinforcing member, without providing a conventional reinforcement inner edge to the incision has been formed or the like, smooth flow of the conduit tube length direction of the curable filler become. Therefore, the pipe repair structure of the present invention has less stagnant water or air between the inner surface member and the pipe wall surface, and can prevent the occurrence of an unfilled portion of the curable filler at the pipe bottom. it can.

And also in this structure, since the inner surface of the pipe of the double-width inner surface member is formed in a concave or convex shape in the width direction with the width direction center of the inner surface member interposed therebetween, The riblet effect can be achieved.

As in the second aspect of the invention, the maximum depth of the concave shape or the maximum height of the convex shape on the inner surface of the pipe in the double-width inner surface member is the width direction of the inner surface of the pipe. to the center and the virtual reference plane connecting the vertex of the corner portion in the width direction at both ends, it is desirable each of which is 0.5 to 5.0 mm (claim 6).

Further, in the invention according to claim 5 or 6 as well, a structure in which 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 (invention 7), or It is effective to add a configuration (claim 8) for chamfering the corners.

According to the pipe repair structure of the present invention, a smooth flow of the inside of the pipe is maintained even after the pipe is repaired, and it is difficult for solid matter to accumulate on the bottom of the pipe, and even if it accumulates, the removal is easy. It becomes. In particular, even in a pipe line such as a horseshoe tube or a rectangular tube (box culvert) where the bottom is flat and the flow speed of the pipe is low, the flow capacity can be improved.

Further, on the inner side of the pipe of the hollow frame-shaped reinforcing body assembled along the inner wall of the pipe, a constant-length inner member having a fixed length in the pipe tube length direction with the pitch width of the fitting portion. , arranged in contact in the longitudinal direction and the width direction, between the inner wall of the fixed-length inside member and the conduit, Te repairing structures smell conduit for filling a curable filling material, fitting of the reinforcing member By using a fixed inner member with a width twice the pitch of the joint, it is possible to reduce the number of work steps when constructing the inner member and to prevent the occurrence of unfilled portions of curable filler at the bottom of the pipe can do.

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 pipe inner surface 10c of the fixed inner member 10 is formed in a concave shape in the width direction as shown in FIG. It is. Further, the regular inner member 10 is formed such that the maximum depth Hmax of the concave shape is 2 mm with respect to a virtual reference plane P connecting the vertices of the corners 10d, 10d at both ends in the width direction. .

  With this configuration, an uneven shape (riblet) following the flow of water is formed on the inner surface of the conduit in the present embodiment. 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.

In addition to forming the inner surface 10c of the standard inner surface member 10 in a concave shape as described above , this riblet structure has a width direction on the pipe inner surface 10c of the standard inner surface member 10 as shown in FIG. or to form a corner portion 10d to R shape at both ends, or, as Figure 5, further effectively function chamfered at the corner portion 10d of the opposite widthwise ends.

Next, a second embodiment of the present invention will be described.
FIG. 6 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. 7 is an enlarged schematic view of part B of FIG. Moreover, FIG. 8 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 this embodiment is that, as shown in FIG. 7, 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, the pipe inner surface 20d of the double-width fixed inner member 20 is formed in a concave shape in the width direction across the width direction center 20e, and the width direction center 20e of the pipe inner surface 20d. Are formed so that the maximum depth Hmax of the concave shape is 2 mm with respect to the virtual reference plane P connecting the corners 20f, 20f at both ends in the width direction.

This configuration, also at the time of injection of the curable filler material 3, while being prevented from lifting of the inside member 20 by injection pressure, the gap formed between the the engaging portion 20c engaging portion 2p of the reinforcing member 2 and the 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.

  Further, the inner surface of the pipe line formed by this repairing method can exhibit the same riblet effect as that of the first embodiment due to the recess formed on the inner pipe surface 20d of the fixed inner surface member 20. 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. 11) formed in the inner edge of the conventional reinforcing member. Furthermore, by not providing the cut-inclusive, it is not necessary to consider the strength reduction due to lump cut, width and line pipe length direction of the thickness of the pipe radial reinforcing member 2, narrower than the conventional and It can be designed to be thin and its shape processing is 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, the conduit inner surface 20d of the fixed-length inside member 20 of the double width especially added to a concave corner portion 20f of the opposite widthwise ends of the pipe inner surface 20d, a 20f It may be formed in an R shape (FIG. 9), or chamfering may be applied to the corners 20f and 20f at both ends in the width direction on the pipe inner surface 20d (FIG. 10).

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, metal, have good be formed of a material having a water-resistant hard.

  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.

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 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 a figure which shows the example of another cross-sectional shape 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 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 (8)

An inner surface member that is continuous in the tube tube length direction is attached to the inner side of the reinforcing member that is disposed substantially along the inner wall of the pipe line, and a curable property is provided between the inner surface member and the inner wall of the pipe line. In a pipe repair structure filled with a filler,
The reinforcing member is formed by assembling a split reinforcing member provided with a fitting portion at a predetermined pitch on the inner side along the inner wall of the pipe, and a plurality of the reinforcing members are arranged in the tube length direction of the pipe, 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 this reinforcing body, in the pipe tube length direction with the pitch width of the fitting portion. A fixed-length inner member is disposed in contact with the longitudinal direction and the width direction of the fixed-length inner member, and at least the inner surface of the inner surface member of the inner member located at the bottom of the conduit is at least one of the fixed inner members. A repair structure for a pipeline, characterized by being formed in a concave or convex shape in the width direction . The maximum depth of the concave shape or the maximum height of the convex shape on the inner surface of the pipe in the fixed-length inner surface member is 0.5 to 5.5 with respect to the virtual reference plane connecting the vertices of the corners at both ends in the width direction. The pipe repair structure according to claim 1 , wherein the pipe repair structure is 0 mm. The pipe repair structure according to claim 1 or 2, 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. The pipe repair structure according to claim 1 or 2, 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 a pipe inner surface of the double-width inner surface member is concave or convex in the width direction across the center in the width direction of the inner surface member. Pipe repair structure characterized by being formed into a shape. The maximum depth of the concave shape or the maximum height of the convex shape on the inner surface of the pipe in the double-width regular inner surface member is defined by the width direction center of the inner surface of the pipe and the apexes of the corners at both ends in the width direction. The pipe repair structure according to claim 5, wherein each of the connected virtual reference planes is 0.5 to 5.0 mm. The pipe repair structure according to claim 5 or 6, wherein a corner in the width direction on the inner side of the double-width fixed inner member is formed in an R shape. The pipe repair structure according to claim 5 or 6, wherein chamfering is performed on a corner in a width direction on the inner side of the pipe of the double-width fixed inner member.

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