Pipe rehabilitation structure, existing pipe rehabilitation method, and regulation member for pipe rehabilitation

Abstract

To provide a pipe rehabilitation structure whereby: when an earthquake load or the like causes a concentrated deformation at a predetermined site of an existing pipe, a flexible part of a rehabilitated pipe is prevented from locally suffering a great deformation to be broken.SOLUTION: The inner periphery of a degraded existing pipe 1 is lined with a spiral rehabilitated pipe 3 composed of a band-like member 10 having a flexible part 15. A clearance 1c between the existing pipe 1 and the rehabilitated pipe 3 includes a regulator 20. The regulator 20 includes a straddling part 23 that straddles the flexible part 15 in a pipe axis direction. The straddling part 23 regulates the amount of elongation of the flexible part 15.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a pipe rehabilitation structure and an existing pipe rehabilitation method formed by rehabilitating an existing pipe such as a sewer pipe, and a regulation member for pipe rehabilitation used therefor. In particular, the present invention relates to a pipe rehabilitation structure in which a spiral tubular rehabilitation pipe made of a belt-like member having an expansion and contraction portion such as a bellows is lined on the inner circumference of an existing pipe.

Background Art

[0002] A method of rehabilitating an existing pipe by spirally winding a belt-like member along the inner circumference of an existing pipe such as an aging sewer pipe to construct a spiral tubular rehabilitation pipe is known (see Patent Documents 1, 2, etc.). For example, the belt-like member of Patent Document 1 is provided with a bellows that can expand and contract in the belt width direction. By expanding and contracting the bellows against a large load during an earthquake, the load can be released.

[0003] As an existing pipe buried underground such as a sewer pipe, a structure in which pipe bodies of a certain length such as hume pipes are arranged in a row is common. A receiving port is provided at one end of each pipe body, and an insertion port is provided at the other end. The insertion port of one of the adjacent pipe bodies is inserted into the receiving port of the other, thereby connecting these pipe bodies.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a rehabilitated existing pipe lined with a rehabilitating pipe made of a strip-shaped member with an expansion and contraction part such as a bellows, displacement during an earthquake may concentrate at a predetermined location. Then, in the rehabilitating pipe, only the expansion and contraction part near the displacement concentration location among the expansion and contraction parts greatly extends and deforms. For example, in a structure where existing pipes are arranged in a row, displacement during an earthquake concentrates at the connection part between adjacent pipe bodies, and only the expansion and contraction parts around the connection part locally extend. If the displacement becomes excessive and exceeds the allowable elongation amount, the expansion and contraction parts near the displacement concentration location may be broken. In view of such circumstances, an object of the present invention is to prevent the expansion and contraction parts near the displacement concentration location in the expansion and contraction part of the rehabilitating pipe from being locally deformed greatly and broken when a predetermined location of the existing pipe is concentratedly displaced due to a load during an earthquake or the like.

Means for Solving the Problem

[0006] To solve the above problems, a pipe rehabilitation structure according to the present invention includes a spiral tubular rehabilitating pipe made of a strip-shaped member having an expansion and contraction part that can expand and contract in the bandwidth direction and wound spirally along the inner circumference of an existing pipe, a regulating member disposed in the pipe gap between the existing pipe and the rehabilitating pipe and including a bridging part that straddles the expansion and contraction part in the pipe axis direction, and the elongation amount of the expansion and contraction part is regulated by the bridging part. It is characterized by comprising the above.

[0007] The regulating member is preferably provided at least at a location (displacement concentration location) in the existing pipe where concentrated displacement is likely to occur due to a load during an earthquake or the like. When such concentrated displacement occurs, among the expansion and contraction parts in the rehabilitating pipe, the expansion and contraction parts near the displacement concentration location are locally greatly expanded and contracted. When the expansion and contraction parts have extended and deformed until they respectively abut against both side parts of the bridging part of the regulating member, further extension and deformation are stopped. For this reason, the load is dispersed to the periphery, and the expansion and contraction parts are extended and deformed over a wide range of the rehabilitating pipe. Thereby, the load can be absorbed over a wide range of the rehabilitating pipe, and it is possible to prevent the expansion and contraction parts near the displacement concentration location from being broken.

[0008] The regulating member has a spacer portion that intersects the telescopic portion and extends in the pipe axis direction and is interposed between the existing pipe and the rehabilitated pipe, and a pair of protrusions that protrude from both sides toward the rehabilitated pipe side across the intersection of the spacer portion and the telescopic portion. It is preferable that the bridging portion is constituted by the intersection portion and the pair of protrusions. The telescopic portion is disposed so as to be sandwiched between the pair of protrusions. Thereby, it is possible to reliably prevent the telescopic portion from being excessively extended and deformed due to a load during an earthquake or the like. The maximum extendable amount of the telescopic portion can be set by the distance between the pair of protrusions. The distance between the pair of protrusions is equal to or less than the allowable elongation amount immediately before the telescopic portion is excessively extended and broken. By interposing the spacer portion between the existing pipe and the rehabilitated pipe, the distance between the existing pipe and the rehabilitated pipe or the size of the pipe gap can be maintained.

[0009] It is preferable that the telescopic portion includes a bellows that bulges to the outer peripheral side of the rehabilitated pipe and is telescopic in the pipe axis direction, and the bellows is inserted inside the bridging portion. By expanding and contracting the bellows, the load during an earthquake can be absorbed. When the bellows extends and deforms until both ends thereof abut against both side portions of the bridging portion, the bellows is restricted from further extending.

[0010] The existing pipe is constituted by a plurality of pipe bodies arranged in a row. The telescopic portion extends spirally over the entire area of the rehabilitated pipe. It is preferable that the bridging portion is arranged so as to straddle at least the telescopic portion in the vicinity of the connection portion between adjacent pipe bodies in the telescopic portion. During an earthquake, adjacent pipe bodies in the existing pipe are relatively displaced, so that a load is applied to the telescopic portion near the connection portion, and the telescopic portion is deformed. By restricting the elongation and deformation of this telescopic portion by the bridging portion of the regulating member, the telescopic portion of the rehabilitated pipe is extended and deformed over a wide range. Thereby, the load can be dispersed and absorbed over a wide range of the rehabilitated pipe.

[0011] Preferably, the regulating member is embedded in the backfill material filled in the pipe gap. This enables the regulating member to be stably arranged within the pipe gap. The existing pipe and the regenerated pipe are structurally integrated via the backfill material, allowing the load to be widely dispersed.

[0012] In the method of regenerating an existing pipe for manufacturing a spiral tubular regenerated pipe by spirally winding a strip-shaped member having an expandable / contractible portion that can expand and contract in the bandwidth direction along the inner circumference of the existing pipe, a step of arranging a regulating member including a straddling portion on the inner circumferential surface of the existing pipe before or during the pipe manufacturing; a step of adjusting the straddling portion to straddle the expandable / contractible portion in the pipe axis direction during the pipe manufacturing; It is characterized by comprising the above. By manufacturing the regenerated pipe, the regulating member is arranged in the pipe gap between the existing pipe and the regenerated pipe. When the straddling portion straddles the expandable / contractible portion in the pipe axis direction, the amount of expansion of the expandable / contractible portion due to a load during an earthquake or the like is regulated. As a result, the load can be dispersed over a wide range of the regenerated pipe, and breakage of the expandable / contractible portion locally can be prevented.

[0013] Further, the present invention relates to a pipe regeneration regulating member arranged in the pipe gap between a spiral tubular regenerated pipe made of a strip-shaped member having an expandable / contractible portion that can expand and contract in the bandwidth direction and spirally wound along the inner circumference of an existing pipe and the existing pipe, including a straddling portion that straddles the expandable / contractible portion in the pipe axis direction, and characterized in that the amount of expansion of the expandable / contractible portion is regulated by arranging the expandable / contractible portion inside the straddling portion. The pipe regeneration regulating member preferably has a spacer portion that intersects the expandable / contractible portion and extends in the pipe axis direction and is interposed between the existing pipe and the regenerated pipe, and a pair of protrusions that project from both sides toward the regenerated pipe side sandwiching the intersection portion of the spacer portion and the expandable / contractible portion. The straddling portion is preferably constituted by the intersection portion and the pair of protrusions.

[0014] Preferably, an uneven pattern is formed on the outer peripheral surface of the spacer portion. This configuration is particularly effective when backfilling material is filled in the inter-pipe gap. The backfilling material has the function of structurally integrating the existing pipe and the rehabilitated pipe to form a composite pipe. On the other hand, if there is a spacer part in the inter-pipe gap, the integration effect may be impaired. In contrast, since the fixing property between the spacer part and the backfilling material is enhanced by the uneven pattern, it is possible to prevent the integration effect from being impaired.

Effects of the Invention

[0015] According to the present invention, in the pipe rehabilitation structure, when a predetermined location of the existing pipe is displaced intensively due to a load during an earthquake or the like, it is possible to prevent the expansion and contraction portion near the displacement concentration location in the expansion and contraction portion of the rehabilitated pipe from being locally deformed greatly. Thereby, breakage of the expansion and contraction portion can be prevented. Furthermore, the load can be dispersed and absorbed over a wide range of the rehabilitated pipe.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0017] Hereinafter, embodiments of the present invention will be described with reference to the drawings. <First Embodiment> FIG. 1 shows a pipe rehabilitation structure 1. The pipe rehabilitation structure 1 includes an existing pipe 2, a rehabilitated pipe 3, and a backfill material 4. The existing pipe 2 is, for example, a sewer pipe buried in the ground. Note that the existing pipe 2 is not limited to a sewer pipe, and may also be a water supply pipe, an agricultural water channel pipe, a water conduit for hydropower generation, a gas pipe, a tunnel, or the like.

[0018] As shown in FIG. 1, the existing pipe 2 is configured by connecting a plurality of pipe bodies 2a in a row. As the pipe body 2a, for example, a hume pipe of a certain length is used. A receiving port 2b is provided at one end of each pipe body 2a, and an insertion port 2d is provided at the other end. The insertion port 2d of one of the adjacent pipe bodies 2a is inserted into the receiving port 2b of the other, whereby these pipe bodies 2a are connected to each other. The receiving port 2b and the insertion port 2d that are fitted to each other constitute a connection part 2c. The connection part 2c is a location (displacement concentration location) in the existing pipe 1 where concentrated displacement is likely to occur due to seismic loads or the like.

[0019] As shown in FIGS. 1 and 2, the rehabilitated pipe 3 is lined on the inner peripheral surface of the aged existing pipe 2. The pipe gap 1c between the existing pipe 2 and the rehabilitated pipe 3 is filled with a backfill material 4 such as mortar. Thereby, a pipe rehabilitation structure 1 is constructed, which is composed of a composite pipe in which the existing pipe 2 and the rehabilitated pipe 3 are structurally integrated via the backfill material 4.

[0020] The regenerative pipe 3 is a spiral pipe formed by spirally winding a strip-shaped member 10. As shown in Fig. 3(a), the strip-shaped member 10 includes a strip plate portion 11, fitting portions 13 and 14, a bellows 15 (expansion and contraction portion), and a rib 16, and is formed into a certain irregular cross-section and extends in the strip length direction (the direction perpendicular to the paper surface in Fig. 3(a)). The material of the strip-shaped member 10 is a synthetic resin such as polyvinyl chloride, for example. The strip plate portion 11 includes a first strip plate portion 11a on one end side in the strip width direction (left in Fig. 3(a)) and a second strip plate portion 11b on the other end side in the strip width direction (right in Fig. 3(a)). A step 11d is formed between these strip plate portions 11a and 11b. The strip plate portion 11a is arranged to be offset to the outer peripheral side (the side facing the outer periphery when the regenerative pipe 3 is manufactured, the upper side in Fig. 3(a)) from the strip plate portion 11b. A first fitting portion 13 with an uneven cross-sectional shape is provided at the end of the strip plate portion 11a.

[0021] A bellows 15 is formed in the middle part of the strip plate portion 11a. The bellows 15 is formed, for example, with a U-shaped cross-section, bulges to the outer peripheral side, and is recessed when viewed from the inner peripheral side (the lower side in Fig. 3(a)). As shown in Figs. 3(a) and 3(b), the bellows 15 can expand and contract in the strip width direction.

[0022] A second fitting portion 14 with an uneven cross-sectional shape that is complementary to the first fitting portion 13 is provided on the outer peripheral surface of the strip plate portion 11b. The strip plate portion 11b extends to the other end side in the strip width direction (right in Fig. 3) from the second fitting portion 14 and constitutes an extended strip portion 11e. A rib 16 with a T-shaped cross-section protruding to the outer peripheral side is formed on the strip plate portion 11 from the bellows 15 to the second fitting portion 14.

[0023] As shown in Fig. 4, in the pipe rehabilitation structure 1, the belt-like member 10 is spirally wound along the inner peripheral surface of the existing pipe 2, and the fitting portions 13 and 14 with a one-turn difference are fitted to each other, whereby the spiral tubular rehabilitation pipe 3 is manufactured. The extending belt portion 11e of the second belt plate portion 11b is overlapped with the inner peripheral side surface (the lower surface in Fig. 4) of the first belt plate portion 11a. The extending belt portion 11e closes the opening to the inner peripheral side of the bellows 15 and fills the step 11d. The inner peripheral surface of the rehabilitation pipe 3 is a smooth surface without a step. As shown in Fig. 1, the bellows 15 extends spirally over the entire area of the rehabilitation pipe 3.

[0024] As shown in Figs. 1 and 2, a plurality of pipe rehabilitation regulating members 20 are installed in the pipe gap 1c in the pipe rehabilitation structure 1. The material of the regulating member 20 may be a metal such as steel, iron, or stainless steel, or may be a hard resin. As shown in Fig. 5, each regulating member 20 includes a spacer portion 21 and a pair of protrusions 22. The spacer portion 21 is formed in a straight bar shape or a reinforcing bar shape. As shown in Fig. 4, the length of the spacer portion 21 is equal to or slightly smaller than the spiral pitch of the rehabilitation pipe 3 in a state where the bellows 15 is not stretched or contracted. The cross-sectional shape of the spacer portion 21 is circular, but is not limited thereto, and may be a polygon such as a quadrangle. The spacer portion 21 may be in a flat plate shape as long as it can be arranged in the pipe gap 1c.

[0025] A pair of protrusions 22 are provided on the circumferential side portion of the spacer portion 21 closer to one end than the middle. The protrusions 22 protrude from the spacer portion 21 so as to be orthogonal to the spacer portion 21. The pair of protrusions 22 are parallel to each other and are arranged at intervals in the longitudinal direction of the spacer portion 21.

[0026] An uneven pattern 24 is formed on the outer peripheral surface of the regulating member 20 including the spacer portion 21 and the protrusions 22. The uneven pattern 24 is, for example, in a mesh shape or a twill shape. The uneven pattern 24 may be a ridge protruding from the outer peripheral surface of the spacer portion 21, a groove recessed from the outer peripheral surface of the spacer portion 21, or a knurl.

[0027] As shown in FIGS. 1 and 2, in the pipe rehabilitation structure 1, a plurality of regulating members 20 are arranged so as to be distributed in the pipe axis direction and the pipe circumferential direction on the outer periphery of the rehabilitation pipe 3. As shown in FIG. 2, in this embodiment, the regulating members 20 are arranged at intervals in the pipe circumferential direction in the pipe clearance 1c in the upper half of the rehabilitation pipe 3. The extending direction of the spacer portion 21 of each regulating member 20 is directed in the pipe axis direction of the rehabilitation pipe 3 (the direction perpendicular to the plane of FIG. 2). As shown in FIGS. 1 and 4, the regulating members 20 at each position in the pipe circumferential direction are arranged so as to be continuous in a straight line. Each regulating member 20 is not fixed to the rehabilitation pipe 3 and is free. These regulating members 20 are embedded and fixed in the backfill material 4 in the pipe clearance 1c.

[0028] By the spacer portion 21 being interposed between the existing pipe 2 and the rehabilitation pipe 3 in the upper half of the pipe rehabilitation structure 1, the interval between these existing pipe 2 and the rehabilitation pipe 3 is maintained. Note that the bottom of the rehabilitation pipe 3 is grounded on the bottom of the existing pipe 2 (FIG. 2).

[0029] As shown in FIG. 4, the portion 21c (intersection portion) between the pair of protrusions 22 in the spacer portion 21 of each regulating member 20 overlaps the outer peripheral side of the bellows 15 and intersects the bellows 15. The pair of protrusions 22 protrude from both sides toward the rehabilitation pipe 3 with the intersection portion 21c interposed therebetween. The intersection portion 21c and the pair of protrusions 22 in the regulating member 20 constitute a straddle portion 23. The straddle portion 23 straddles the bellows 15 in the pipe axis direction of the rehabilitation pipe 3. In the straddle portion 23, a straddle recess 23c is formed by the intersection portion 21c and the pair of protrusions 22. The bellows 15 is inserted into the straddle recess 23c. The bellows 15 is arranged so as to be sandwiched between the pair of protrusions 22. The pair of protrusions 22 define both side portions of the straddle recess 23c.

[0030] As shown in FIG. 7, the extension amount of the bellows 15 is regulated by the bridging portion 23. The separation distance between the pair of protrusions 22 becomes the maximum extendable amount of the bellows 15. The said separation distance, that is, the said maximum extendable amount, is smaller than the allowable extension amount (the extension amount at the time of breakage) of the bellows 15. The regulating member 20 may be provided at least at or near the connecting portion 2c. The bridging portion 23 may be arranged so as to straddle at least the bellows portion 15a (the telescopic portion) in the immediate vicinity or near the connecting portion 2c in the bellows 15.

[0031] <Existing pipe rehabilitation method> In the rehabilitation construction of the aged existing pipe 1, before the rehabilitation pipe 3 is lined (pipe manufactured), the regulating member 20 is temporarily fixed to a predetermined position on the inner peripheral surface of the existing pipe 2 by a temporary fixing means (not shown) such as a U-shaped anchor. Thereafter, by lining the rehabilitation pipe 3, the regulating member 20 is sandwiched between the existing pipe and the rehabilitation pipe 3. Thereby, the regulating member 20 is arranged in the pipe gap 1c. At the time of the temporary fixing, the protrusion 22 may be directed in the circumferential direction of the existing pipe 2, and the regulating member 20 may be rotated by about 90 degrees during or after the lining so that the protrusion 22 is directed toward the inner peripheral side of the pipe. Furthermore, the position and orientation of the regulating member 20 are adjusted so that the bridging portion 23 straddles the bellows 15 in the pipe axis direction. The temporary fixing step may be omitted. In parallel with lining the rehabilitation pipe 3, the regulating member 20 may be inserted between the inner peripheral surface of the rehabilitation pipe 3 and the existing pipe 1 during the lining (when manufacturing the pipe). The rehabilitation pipe 3 may be manufactured with a slightly smaller diameter, the regulating member 20 may be inserted and arranged in the pipe gap 1c, and then the rehabilitation pipe 3 may be expanded in diameter.

[0032] After lining the rehabilitation pipe 3, the backfill material 4 is filled into the pipe gap 1c. As a result, the regulating member 20 is embedded in the backfill material 4. Therefore, the regulating member 20 can be stably arranged within the pipe gap 1c. In addition, the fixing strength of the spacer portion 21 to the backfill material 4 is enhanced by the uneven pattern 24. Therefore, even if the spacer portion 21 is present in the pipe gap 1c, it is possible to prevent the integration effect between the existing pipe 1 and the rehabilitation pipe 3 by the backfill material 4 from being impaired. In this way, the aged existing pipe 2 is rehabilitated, and the pipe rehabilitation structure 1 is constructed.

[0033] In the pipe rehabilitation structure 1, with respect to the load due to an earthquake or the like, the bellows 15 expands and contracts, thereby allowing the load to escape. Specifically, as shown in FIG. 6, when a load due to an earthquake or the like is applied to the existing pipe 1, the adjacent pipe bodies 2a are displaced relative to each other, and thus displacement tends to concentrate particularly at the connection portion 2c (predetermined location). For this reason, in the rehabilitation pipe 3, among the spiral bellows 15, particularly the bellows portion 15a near the connection portion 2c is locally greatly expanded and contracted. As shown in FIG. 7, when the bellows portion 15a is greatly extended, both ends of the bellows portion 15a respectively abut against a pair of protrusions 22 of the straddling portion 23 of the corresponding regulating member 20A. For this reason, further elongation deformation of the bellows portion 15a is prevented. Thereby, it is possible to prevent the bellows portion 15a near the connection portion 2c (displacement concentration location) from being excessively extended and broken.

[0034] As shown in FIG. 6, since the bellows portion 15a near the connection portion 2c is restrained from deforming by the corresponding restricting member 20A, the load is dispersed, and the bellows 15 is stretched and deformed over a wide range of the rehabilitation pipe 3. Preferably, the stretching deformation is propagated over a plurality of pitches of the spiral bellows 15 centering on the bellows portion 15a. Thereby, the load can be absorbed by the portions of the spiral tubular rehabilitation pipe 3 over a plurality of pitches. Even in the portion away from the connection portion 2c, when the bellows 15 is stretched to the maximum stretchable amount, the corresponding restricting member 20 can restrict further stretching. When the bellows 15 in the upper half of the rehabilitation pipe 3 is restrained by the restricting member 20, the restraining force also reaches the lower half, and the stretching of the bellows 15 in the lower half is suppressed. As a result, it is possible to surely prevent the bellows 15 of the rehabilitation pipe 3 from being broken by a load such as an earthquake.

[0035] Next, another embodiment of the present invention will be described. Regarding the configurations overlapping with the previously described embodiments in the following embodiments, the same reference numerals are given in the drawings and the description thereof is omitted. <Second Embodiment (FIG. 8)> FIG. 8 shows a second embodiment of the present invention. In the second embodiment, the restricting members 20 are arranged not only in the upper half but also in the lower half of the outer periphery of the rehabilitation pipe 3, and are arranged at intervals over the entire circumference of the outer periphery of the rehabilitation pipe 3. The bottom of the rehabilitation pipe 3 is lifted from the bottom of the existing pipe 1 by the spacer portion 21 of the restricting member 20 arranged in the lower half. Preferably, the rehabilitation pipe 3 is arranged so as to be substantially concentric with the existing pipe 1.

[0036] The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit thereof. For example, the restricting member 20 may be arranged only in the lower half of the outer periphery of the rehabilitation pipe 3, or may be arranged only on both the left and right side portions. The expansion and contraction part of the belt-like member does not necessarily have to be constituted by bellows. The belt-like member may not have bellows. The fitting parts 13 and 14 of the belt-like member 10 in the rehabilitation pipe 3 may be displaceable or deformable in the pipe axis direction (band width direction) by the clearance between them or their respective elasticities, and the "expansion and contraction part" may be constituted by the fitting parts 13 and 14. The expansion and contraction part composed of the fitting parts 13 and 14 may be arranged so that the straddling part 23 of the restricting member 20 straddles it. The backfill material 4 may be omitted. The rehabilitation pipe 3 may constitute a self-supporting pipe that bears the required strength by itself. The rehabilitation pipe 3 may have a two-strand spiral structure including a wide belt-like member (strip) and a narrow belt-like member (joiner). An expansion and contraction part such as a bellows may be formed on either one of the belt-like members.

Industrial Applicability

[0037] The present invention can be applied to, for example, the rehabilitation technology of aging sewer pipes.

Explanation of Signs

[0038] 1 Pipe rehabilitation structure 1c Pipe clearance 2 Existing pipe 2a Pipe body 2b Inlet 2c Connection part (displacement concentration point) 2d Outlet 3 Rehabilitation pipe 4 Backfill material 10 Belt-like member 11 Belt plate part 11a Belt plate part 11b Belt plate part 11d Step 11e Extended belt part 13 First fitting part 14 Second fitting part 15 Bellows (expansion and contraction part) 15a Bellows part (expansion and contraction part) near the connection part 16 Rib 20 Restricting member Regulatory member corresponding to 20A, of the connection part 21 Spacer part 21c Intersection part 22 Protrusion 23 Straddle part 24 Concavo-convex pattern

Claims

1. A spiral tubular rehabilitation pipe made of a strip-shaped member having an expandable and contractible portion in the bandwidth direction and spirally wound along the inner circumference of an existing pipe, A regulating member disposed in the pipe gap between the existing pipe and the rehabilitation pipe and including an overhanging portion straddling the expandable and contractible portion in the pipe axis direction, wherein the overhanging portion regulates the amount of expansion of the expandable and contractible portion, comprising: the regulating member has a spacer portion that intersects the expandable and contractible portion and extends in the pipe axis direction and is interposed between the existing pipe and the rehabilitation pipe, and a pair of protrusions that protrude from both sides toward the rehabilitation pipe side sandwiching the intersection portion of the spacer portion and the expandable and contractible portion, and the overhanging portion is constituted by the intersection portion and the pair of protrusions. A pipe rehabilitation structure characterized by this.

2. The pipe rehabilitation structure according to claim 1, wherein the expandable and contractible portion includes a bellows that bulges to the outer peripheral side of the rehabilitation pipe and is expandable and contractible in the pipe axis direction, and the bellows is inserted inside the overhanging portion.

3. The existing pipe is constituted by a plurality of pipe bodies arranged in a row, the expandable and contractible portion extends spirally over the entire area of the rehabilitation pipe, The pipe rehabilitation structure according to claim 1 or 2, wherein the overhanging portion is arranged so as to straddle at least the expandable portion disposed in the immediate vicinity of the connection portion between adjacent pipe bodies in the expandable and contractible portion.

4. The pipe rehabilitation structure according to any one of claims 1 to 3, wherein the regulating member is embedded in a backfill material filled in the pipe gap.

5. In an existing pipe rehabilitation method for manufacturing a spiral tubular rehabilitation pipe by spirally winding a strip-shaped member having an expandable and contractible portion in the bandwidth direction along the inner circumference of an existing pipe, A step of disposing a regulating member including an overhanging portion on the inner peripheral surface of the existing pipe before or during the pipe manufacturing, A step of adjusting the overhanging portion so as to straddle the expandable and contractible portion in the pipe axis direction during the pipe manufacturing, An existing pipe rehabilitation method characterized by comprising

6. A pipe rehabilitation regulating member disposed in the pipe gap between a spiral tubular rehabilitation pipe made of a belt-like member spirally wound along the inner circumference of an existing pipe and having an expandable and contractible portion in the bandwidth direction, and the existing pipe, including a straddling portion straddling the expandable and contractible portion in the pipe axis direction, and the expandable and contractible portion is disposed inside the straddling portion, whereby the amount of elongation of the expandable and contractible portion is regulated, having a spacer portion extending in the pipe axis direction intersecting the expandable and contractible portion and interposed between the existing pipe and the rehabilitation pipe, and a pair of protrusions protruding from both sides toward the rehabilitation pipe side sandwiching the intersection portion of the spacer portion with the expandable and contractible portion, and the straddling portion is constituted by the intersection portion and the pair of protrusions, a pipe rehabilitation regulating member characterized by this.

7. The pipe rehabilitation regulating member according to claim 6, characterized in that an uneven pattern is formed on the outer peripheral surface of the spacer portion.

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