JP6559920B1 - Pipeline rehabilitation method and rehabilitation pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe rehabilitation method capable of forming a rehabilitated pipe excellent in earthquake resistance at a short construction period and at low cost. In this pipe rehabilitation method, a rehabilitation pipe 10 in which an existing pipe 12 and a lining pipe 14 are integrated with a filler 16 is formed. First, an annular groove 60 extending in the circumferential direction is formed at a predetermined position on the inner peripheral surface of the existing pipe, and then a sealing member 62 for preventing entry of the filler into the annular groove is provided. Thereafter, a lining tube having extensibility is formed along the inner peripheral surface of the existing tube, and a filler is filled between the inner peripheral surface of the existing tube and the outer peripheral surface of the lining tube. [Selection] Figure 6

Description

  The present invention relates to a pipe rehabilitation method and a rehabilitation pipe, and more particularly to a pipe rehabilitation method and a rehabilitation pipe in which, for example, an existing pipe and a lining pipe form a rehabilitation pipe integrated with a filler.

  An example of a conventional pipeline rehabilitation method is disclosed in Patent Document 1. In the technique of Patent Document 1, a lining pipe (inner) is formed by connecting edge portions in the width direction of a band plate member (band-like strip) wound spirally along an inner peripheral surface of an existing pipe with a connecting member (joiner). After forming the pipe), a filler is injected between the existing pipe and the lining pipe to form a rehabilitation pipe in which the existing pipe and the lining pipe are integrated. The joiner used in the technique of Patent Document 1 has an extendable part constituted by a flexible part and a notch, and the joiner breaks at the place of the notch even when the strip pitch is greatly expanded due to an earthquake or the like. As a result, the spread of the pitch of the strip is allowed. Further, the gap formed by the breakage of the notch is watertightly sealed by the flexible part.

  According to the technique of Patent Document 1, a lining pipe having an expandable portion is formed. Therefore, even when an earthquake or the like occurs, the lining pipe can follow it and ensure water tightness. However, since the existing pipe itself is not flexible, the connection between the existing pipe and the manhole, for example, may be damaged during an earthquake, and groundwater and earth and sand may enter the pipe from this damaged location. is there. For this reason, the pipeline rehabilitation method which has a more flexible structure and can form the rehabilitation pipe | tube excellent in earthquake resistance is calculated | required.

  On the other hand, Patent Document 2 discloses a method (earthquake resistant structure) in which an induction joint is formed in an existing pipe having an inner peripheral surface formed with a lining layer to make it earthquake resistant. In the technique of Patent Document 2, an induction joint made of a groove that crosses the lining layer formed over the entire inner peripheral surface of the existing pipe in the thickness direction is formed at a predetermined position of the existing pipe. A gap between the lining layers opened on the side surfaces of the lining is closed by a closing member. Thereafter, a closing member that closes the induction joint is arranged opposite the induction joint, and a support member that supports the closing member by pressing the closing member against the lining layer is provided, whereby the existing pipe with the lining layer formed on the inner peripheral surface is provided. Perform anti-seismic water treatment.

JP 2004-251340 A JP 2010-285760 A

  However, in the technique of Patent Document 2, the existing pipe is provided with a lining layer (lining pipe and filler) to form a rehabilitation pipe, and the formed rehabilitation pipe has an anti-seismic water treatment process in two stages. Therefore, the construction period becomes longer and the construction cost increases. In the technique of Patent Document 2, since the lining layer is cut when the induction joint is formed, it is necessary to provide a closing member facing the induction joint, and a gap between the lining layers opened on the side surface of the induction joint is formed. Since it is necessary to close with the closing member, it takes time and effort.

  Therefore, the main object of the present invention is to provide a novel pipe rehabilitation method and rehabilitation pipe.

  Another object of the present invention is to provide a pipe rehabilitation method and a rehabilitation pipe that can form a rehabilitation pipe excellent in earthquake resistance at a short construction period and at a low cost.

  The first invention is a pipe rehabilitation method for forming a rehabilitation pipe in which an existing pipe and a lining pipe are integrated by a filler, and (a) extends in a circumferential direction to a predetermined position on an inner peripheral surface of the existing pipe. (B) After step (a), an annular groove is provided in the annular groove after step (a), and (c) after step (b), A lining member is constructed along the inner peripheral surface to form an extensible lining pipe. (D) After step (c), between the inner peripheral face of the existing pipe and the outer peripheral face of the lining pipe. This is a pipeline rehabilitation method for filling a filler.

  In the first invention, a rehabilitation pipe in which an existing pipe and a lining pipe are integrated by a filler is formed. First, in step (a), an annular groove extending in the circumferential direction is formed at a predetermined position on the inner peripheral surface of the existing pipe. Next, in step (b), a sealing member is provided in the annular groove. The sealing member prevents the filler from entering the annular groove, and prevents the annular groove from being filled with the filler. Subsequently, in step (c), a lining member is applied along the inner peripheral surface of the existing pipe to form an extensible lining pipe in the existing pipe. Thereafter, in step (d), a filler is filled between the inner peripheral surface of the existing pipe and the outer peripheral surface of the lining pipe, thereby forming a rehabilitation pipe in which the existing pipe and the lining pipe are integrated by the filler. To do.

  In the rehabilitated pipe formed in this way, when an earthquake or the like occurs, a site where the existing pipe is damaged can be induced in the annular groove portion. For this reason, it is possible to prevent damage to other parts of the existing pipe (and thus the rehabilitation pipe), and it is possible to prevent the rehabilitation pipe from being damaged in an unmanaged state. In other words, by forming the annular groove in the existing pipe, the rehabilitated pipe can be made to have a flexible structure, and the seismic resistance of the rehabilitated pipe can be improved. Further, when the existing pipe is deformed at the annular groove portion, the deformation is transmitted to the lining pipe. However, since the lining pipe has extensibility, it follows the deformation of the existing pipe while maintaining watertightness.

  According to the first invention, since the annular groove forming step is incorporated in the process of the pipe rehabilitation method, and the lining pipe is constructed after the annular groove is formed in the existing pipe, the rehabilitated pipe having excellent earthquake resistance is reduced in the short construction period and It can be formed at low cost. Further, since the lining pipe is not cut when the annular groove is formed, water cannot enter from the cut portion. For this reason, it is not necessary to separately install a closing member at the cut part to ensure water tightness, and even if an existing pipe breaks at the annular groove part at the time of an earthquake, etc., the lining pipe makes the renewed pipe water tight. Appropriately secured.

  A second invention is dependent on the first invention, and in step (c), a lining pipe having an extendable portion is formed.

  The third invention is dependent on the second invention, and in step (c), the lining pipe is formed so that the extendable portion is disposed at a position overlapping the annular groove in the pipe axis direction of the existing pipe.

  According to the third aspect of the present invention, when the existing pipe is broken at the annular groove portion, the stretchable portion is easily stretched (follows easily) in conjunction with the fracture. Therefore, the load applied to the other part of the lining pipe is reduced, and the breakage of the lining pipe is more appropriately prevented.

  A fourth invention is dependent on any one of the first to third inventions, and in step (c), a strip plate-shaped lining member is used as the lining member and is wound spirally. A lining pipe is formed by connecting adjacent side edges of each other.

  In 4th invention, a lining pipe | tube is formed by winding a strip | belt-plate-shaped lining member helically and connecting the adjacent side edge parts. In this case, two or more types of strip-shaped lining members may be used in combination, or one type of strip-shaped lining member may be used alone.

  A fifth invention is dependent on any one of the first to fourth inventions, and in step (c), a lining member having an expandable portion is used as the lining member.

6th invention is the rehabilitation pipe | tube with which the existing pipe and the lining pipe were integrated by the filler, Comprising: The annular groove formed so that it might extend in the circumferential direction in the predetermined position of the internal peripheral surface of an existing pipe, An annular groove A sealing member that prevents the filler from entering the annular groove, a lining pipe that has extensibility and is formed along the inner peripheral surface of the existing pipe, and the inner circumference of the existing pipe The inner surface of the existing pipe and the inner surface of the annular groove in a continuous state without being cut at a position overlapping with the annular groove. It is a rehabilitation pipe that covers .

  In 6th invention, when an earthquake etc. have occurred, the site | part which an existing pipe breaks can be induced to the part of an annular groove. For this reason, it is possible to prevent damage to other parts of the existing pipe (and thus the rehabilitation pipe), and it is possible to prevent the rehabilitation pipe from being damaged in an unmanaged state. In other words, by forming the annular groove in the existing pipe, the rehabilitated pipe can be made to have a flexible structure, and the seismic resistance of the rehabilitated pipe can be improved. Further, when the existing pipe is deformed at the annular groove portion, the deformation is transmitted to the lining pipe. However, since the lining pipe has extensibility, it follows the deformation of the existing pipe while maintaining watertightness.

  According to 6th invention, the rehabilitation pipe | tube excellent in earthquake resistance can be provided with a short construction period and low cost. Further, since the lining pipe is not cut by the annular groove, it is not necessary to separately construct a closing member or the like in order to ensure the water tightness of the rehabilitation pipe.

  According to the present invention, since the annular groove forming step is incorporated in the process of the pipe rehabilitation method, and the lining pipe is constructed after the annular groove is formed in the existing pipe, the rehabilitated pipe having excellent earthquake resistance has a short construction period and low cost. Can be formed. Further, since the lining pipe is not cut when the annular groove is formed, water cannot enter from the cut portion. For this reason, it is not necessary to separately install a closing member at the cut part to ensure water tightness, and even if an existing pipe breaks at the annular groove part at the time of an earthquake, etc., the lining pipe makes the renewed pipe water tight. Appropriately secured.

  The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is an illustration figure which shows typically a mode when a lining pipe | tube is formed in an existing pipe | tube in the pipe line renovation method which is one Example of this invention. It is sectional drawing which shows an example of a strip member. It is sectional drawing which shows an example of a connection member. It is sectional drawing which shows a mode that the side edge parts of the strip member were connected with the connection member. It is an illustration figure which shows a series of processes of the pipe line renovation method. It is sectional drawing which shows the rehabilitation pipe | tube formed by the pipe line renovation method. It is sectional drawing which shows typically the mode of the renovated pipe when an annular groove part fractures | ruptures at the time of an earthquake etc.

  Referring to FIG. 1, a pipe rehabilitation method according to an embodiment of the present invention is to rehabilitate an existing pipe 12 buried underground, and the existing pipe 12 and the lining pipe 14 are integrated by a filler 16. A rehabilitated tube (composite tube) 10 is formed. As will be described in detail later, in this embodiment, the band plate member 20 is spirally wound along the inner surface of the existing pipe 12, and adjacent side edges of the band plate member 20 are connected by the connection member 22. As a result, the lining pipe 14 is produced in the existing pipe 12.

  The pipe rehabilitation method according to the present invention is for rehabilitating reinforced concrete pipes (fume pipes), concrete pipes, ceramic pipes, synthetic resin pipes, etc. The diameter, shape, and usage of the existing pipe 12 to be rehabilitated are as follows: There is no particular limitation. In this embodiment, description will be made on the assumption that a sewage pipe having a circular section with a medium and large diameter is renovated.

  First, an example of a strip plate member (strip) 20 and a connection member (joiner) 22 which are strip plate-shaped lining members (pipe rehabilitation members) constituting the lining pipe 14 will be described. However, the specific configurations or shapes of the band plate member 20 and the connection member 22 shown below are merely examples, and can be changed as appropriate.

  As shown in FIG. 2, the band plate member 20 is a long member that is a main component of the lining pipe 14, and includes a band plate-shaped base 30. The inner surface 30a of the base body 30 is a surface constituting the inner surface of the lining pipe 14, and is a smooth surface. Further, on the outer surface 30b side of the base body 30, a plurality of ribs 32 that are arranged at predetermined intervals in the width direction and extend in the longitudinal direction are formed. The rib 32 includes a substantially T-shaped first rib 32a and substantially L-shaped second ribs 32b disposed on both side edges of the base body 30, and is embedded in a filler (backing material) described later. Demonstrate the anchor function.

  Moreover, the 1st fitting part 34 fitted by the 2nd fitting part 42 of the connection member 22 mentioned later is formed in the both-sides edge part of the base | substrate 30. As shown in FIG. The 1st fitting part 34 is formed in the substantially U shape opened toward the inner surface 30a side of the base | substrate 30, and it exists in the width direction inner side and the outer side at the vertical piece 34a arrange | positioned on the width direction outer side. Two locking claws that protrude are formed.

  The strip member 20 is integrally formed by, for example, extrusion molding of a synthetic resin such as hard vinyl chloride, and the rib 32 and the first fitting portion 34 are formed over the entire length of the base body 30 in the longitudinal direction. The width | variety of the strip member 20 is 250 mm, for example, and the height is 17.5 mm, for example.

  As shown in FIG. 3, the connection member 22 is a long member for connecting side edges of the band plate member 20, and includes a band plate-like substrate 40. The inner surface 40 a of the substrate 40 constitutes the inner surface of the lining pipe 14 together with the inner surface 30 a of the strip plate member 20. Moreover, the 2nd fitting part 42 fitted with the 1st fitting part 34 of the strip | belt-plate member 20 is formed in the both-sides edge part of the board | substrate 40. As shown in FIG. The second fitting portion 42 includes two protrusions 42a that protrude from the outer surface 40b of the substrate 40 and extend in the longitudinal direction, and a locking claw is formed at the tip of each protrusion 42a. Further, a water stop material 44 is provided between the two protrusions 42a.

  Further, an extendable portion 46 that can be extended in the width direction of the connecting member 22, that is, in the tube axis direction of the lining pipe 14, is formed at the center of the substrate 40. The extendable portion 46 includes a U-shaped groove portion 48 protruding from the outer surface 40 b and a wave-shaped flexible portion 50 that connects the outer surfaces 40 b so as to cover the entire groove portion 48. Such an extendable portion 46 can be expanded and contracted in accordance with the deformation of the groove portion 48, and the groove portion 48 is broken (divided) in the width direction, so that a large expansion in accordance with the deformation of the flexible portion 50 is possible. .

  The substrate 40, the second fitting portion 42, and the groove portion 48 of the connection member 22 are integrally formed by, for example, extrusion molding of a synthetic resin such as hard vinyl chloride. The flexible portion 50 is formed of, for example, a polyolefin resin such as polyethylene and is fixed to the substrate 40. The second fitting portion 42, the water blocking material 44 and the extensible portion 46 are formed over the entire length of the substrate 40 in the longitudinal direction. The width of the connecting member 22 is 55 mm, for example.

  As shown in FIG. 4, when the adjacent side edge portions of the strip plate member 20 wound spirally are connected by the connection member 22, the first fitting portion 34 of the strip plate member 20 and the connection member 22 are connected. Are fitted together. Then, each locking claw of the second fitting portion 42 is locked to each locking claw of the first fitting portion 34, and the connection member 22 is secured to the band plate member 20, and is fixed. The side edges of the band plate member 20 are connected by the connecting member 22. Moreover, the water-stop material 44 and the front-end | tip part of the vertical piece 34a of the 1st fitting part 34 contact, and the water stop of this connection part is ensured. Furthermore, by forming the lining tube 14 using the connecting member 22 having the extendable portion 46, the lining tube 14 having the extendable portion 46 extending in a spiral shape is formed, and the formed lining tube 14 has a tube axis. It becomes extensible in the direction.

  Subsequently, referring to FIG. 1 and FIG. 5, the pipe rehabilitation method for rehabilitating the existing pipe 12 by forming the rehabilitation pipe 10 in which the existing pipe 12 and the lining pipe 14 are integrated with the filler 16. An example will be described.

  When rehabilitating the existing pipe 12, first, necessary members such as the strip plate member 20, the connecting member 22, the spacer 18 and the sealing member 62, the cutter device, and the pipe making machine are disposed on the ground near the rehabilitating section of the existing pipe 12. Necessary devices such as are prepared as appropriate. The strip member 20 and the connecting member 22 are individually wound in a roll shape, and installed on the ground at the start position and the end position of the rehabilitation section. Further, the inner peripheral surface of the existing pipe 12 is appropriately cleaned using a high pressure washer or the like.

  Next, as shown in FIG. 5A, an annular groove 60 extending in the circumferential direction is formed at a predetermined position on the inner peripheral surface of the existing pipe 12. For the formation of the annular groove 60, it is preferable to use a dedicated cutter device capable of simultaneously cutting the concrete and the reinforcing bar.

  The size and shape of the annular groove 60 are not particularly limited and are appropriately set according to conditions such as the material of the existing pipe 12 and the diameter, but the width of the annular groove 60 is preferably 5 mm to 10 mm, for example. Further, the depth of the annular groove 60 is preferably such that the remaining thickness of the existing pipe 12 is 20 mm to 30 mm, for example, and the bottom surface of the annular groove 60 is a reinforcing bar so that there is no reinforcing bar in the remaining portion of the existing pipe 12. The depth located on the outer peripheral surface side is more preferable than the bar arrangement position. Further, as the cross-sectional shape of the annular groove 60, a rectangular shape, a triangular shape, a semicircular shape, or the like can be adopted. In this embodiment, a rectangular shape is adopted.

  The formation position of the annular groove 60 in the tube axis direction of the existing pipe 12 is not particularly limited, but is preferably formed in the vicinity of the connection portion 72 between the existing pipe 12 and the manhole 70. For example, it is preferable to form the annular groove 60 at a position about 500 mm from the connecting portion 72. Furthermore, the annular groove 60 is preferably formed over the entire length in the circumferential direction of the existing pipe 12, but is not necessarily formed continuously over the entire length in the circumferential direction. The annular groove 60 may be formed with a part left.

  When the annular groove 60 is formed on the inner peripheral surface of the existing pipe 12, subsequently, as shown in FIG. 5B, a sealing member 62 is provided for the annular groove 60. The sealing member 62 prevents the filler 16 from entering the annular groove 60, and prevents the filler 16 from being integrated with the existing pipe 12 in the annular groove 60, that is, the filler 16. Prevents the annular groove 60 from being filled.

  As the sealing member 62, a foaming material such as polystyrene foam and a caulking material such as a silicone-based caulking material can be used. By filling such a sealing member 62 in the annular groove 60, it is preferable to prevent the filler 16 from entering the annular groove 60. However, the sealing member 62 does not necessarily need to be filled in the annular groove 60 as long as it can prevent the filler 16 from entering the annular groove 60. For example, a band-shaped (tape-shaped) or short cylindrical sealing member may be attached to the annular groove 60 so as to cover the opening of the annular groove 60.

  When the annular groove 60 is sealed by the sealing member 62, the spacer 18 is then installed on the inner surface top of the existing pipe 12 along the pipe axis direction (see FIG. 1). The spacer 18 forms a guide passage for introducing an injection hose for the filler 16 between the existing pipe 12 and the lining pipe 14. In addition, the spacer 18 prevents the lining pipe 14 from floating due to the injected filler 16 and improves the strength of the formed rehabilitation pipe 10.

  When the spacer 18 is installed on the inner surface top of the existing pipe 12, subsequently, as shown in FIGS. 1 and 5C, the lining pipe 14 is constructed in the existing pipe 12 using a pipe making machine. Here, first, while pulling the strip plate member 20 into the existing tube 12, the strip plate member 20 is spirally wound along the inner peripheral surface of the existing tube 12 to temporarily manufacture the spiral tube. At this time, a gap corresponding to a fitting margin of the connection member 22 is provided between adjacent side edge portions of the band plate member 20. In addition, in the spiral pipe that has been temporarily piped while proceeding with the provisional pipe work, the adjacent side edges of the band plate member 20 are connected by the connecting member 22 in order from the start position using a pipe making machine. Go. That is, the lining pipe 14 along the inner peripheral surface of the existing pipe 12 is manufactured by sequentially fitting the first fitting portion 34 of the strip member 20 and the second fitting portion 42 of the connecting member 22 together. .

  Here, when the lining pipe 14 is formed in the existing pipe 12, the lining pipe 14 is formed so that the extensible portion 46 is disposed at a position overlapping the annular groove 60 in the pipe axis direction of the existing pipe 12. It is preferable. This is because when the existing pipe 12 is broken at the annular groove 60 as described later, the extendable portion 46 is easily extended (follows easily) in conjunction with the break. In this embodiment, since the lining tube 14 having the extendable portion 46 extending in a spiral shape is formed, the annular groove 60 and the extendable portion 46 are formed in any tube axial position regardless of the position of the annular groove 60. They overlap (intersect) in the axial direction. That is, according to this embodiment, the construction worker does not particularly care about the position of the extendable portion 46, and only forms the lining pipe 14 using the band plate member 20 and the connecting member 22 as usual. The extendable portion 46 can be disposed at a position overlapping the annular groove 60.

  When the lining pipe 14 is formed in the existing pipe 12, a cement milk filler 16 is subsequently injected between the inner peripheral surface of the existing pipe 12 and the outer peripheral face of the lining pipe 14. By solidifying the filler 16, the rehabilitation pipe 10 in which the existing pipe 12 and the lining pipe 14 are integrated by the filler 16 as shown in FIG. 6 is formed. Then, the renovation work of the existing pipe 12 is completed by appropriately performing a tidying work or the like.

  As shown in FIG. 6, the rehabilitation pipe 10 formed as described above includes an existing pipe 12, an annular groove 60 formed on the inner peripheral surface of the existing pipe 12, and a sealing member provided in the annular groove 60. 62, the lining pipe 14 having the extendable portion 46 and formed along the inner peripheral surface of the existing pipe, and filled between the inner peripheral face of the existing pipe 12 and the outer peripheral face of the lining pipe 14 And a filler 16.

  In such a rehabilitation pipe 10, since the existing pipe 12 has the annular groove 60, that is, the existing pipe 12 is intentionally provided with a portion having a low strength, as shown in FIG. When acting on the rehabilitation pipe 10, the portion of the annular groove 60 of the existing pipe 12 is cracked before the other portion, and the existing pipe 12 is stretched and bent at the portion of the annular groove 60. That is, since the damaged part of the existing pipe 12 can be induced in the annular groove 60, the other part of the existing pipe 12 (and thus the rehabilitated pipe 10) can be prevented from being damaged. Damage in the management state can be prevented. Thus, by forming the annular groove 60 in the existing pipe 12, the rehabilitation pipe 10 can be made into a flexible structure, and the earthquake resistance of the rehabilitation pipe 10 can be improved.

  Further, when deformation such as expansion or bending occurs in the existing pipe 12 at the annular groove 60, the deformation is transmitted to the lining pipe 14. The lining pipe 14 follows the deformation of the existing pipe 12 while maintaining the watertightness by the groove portion 48 breaking in the width direction and the flexible portion 50 extending greatly. That is, in this embodiment, since the lining pipe 14 is not cut when the annular groove 60 is formed, the lining pipe 14 can be used as it is in the rehabilitation pipe 10 without impairing the seismic function inherent to the lining pipe 14.

  Further, by forming the annular groove 60 in the vicinity of the connection portion 72 between the existing pipe 12 and the manhole 70, when the existing pipe 12 is cracked at the portion of the annular groove 60, the existing pipe 12 is connected to the manhole 70. The part including the connecting part 72 and the other part are separated and behave independently of each other. That is, the displacement is absorbed by the annular groove 60 at the time of an earthquake, and the load applied to the connecting portion 72 is reduced, so that the connecting portion 72 is prevented from being damaged.

  As described above, according to this embodiment, the process of forming the annular groove 60 is incorporated in the process of the pipe rehabilitation method, and the lining pipe 14 is constructed after the annular groove 60 is formed in the existing pipe 12. It is possible to form the rehabilitated pipe 10 which is excellent in a short construction period and low cost. Further, since the lining pipe 14 is not cut when the annular groove 60 is formed, water from the cut portion cannot occur. For this reason, it is not necessary to separately install a closing member or the like at the cut portion in order to ensure water tightness. Even if the existing pipe 12 is broken at the annular groove 60 during an earthquake or the like, the rehabilitated pipe 10 is provided by the lining pipe 14. The water tightness of the water is appropriately secured.

  Further, since the lining pipe 14 is formed so that the extensible portion 46 is disposed at a position overlapping the annular groove 60 in the pipe axis direction of the existing pipe 12, the existing pipe 12 is deformed (broken) at the annular groove 60 portion. When this is done, the extendable portion 46 can be appropriately extended in conjunction with this deformation. Therefore, the load applied to the connecting portion of the lining pipe 14 is reduced, and breakage of the lining pipe 14 (such as disengagement between the first fitting portion 34 and the second fitting portion 42) is more appropriately prevented. .

  In the above-described embodiment, the connection member 22 including the extendable portion 46 is used, but a similar extendable portion can be formed on the band plate member 20.

  Further, the lining members such as the band plate member 20 and the connecting member 22 do not necessarily have to be provided with a stretchable part alone, and the connecting portion is bent (deformed) to the extent that the fitting is not removed, so that the lining pipe 14 is You may make it expand | extend. That is, the connection part (the 1st fitting part 34 and the 2nd fitting part 42) of lining members may function as an extensible part.

  Furthermore, it is not always necessary to use a lining member having an extensible part, in contrast to forming a lining pipe having extensibility. By forming the lining member with an extensible material such as polyethylene, the lining pipe has extensibility. You may make it have.

  Moreover, in the above-mentioned Example, although the adjacent side edge part of the strip | belt board member 20 was connected using the connection member 22, it is not limited to this, It mutually fits in the both-sides edge part of a strip | belt board member. You may make it connect the side edge parts of a strip | belt board member directly by forming a fitting part. That is, when forming a lining pipe by spirally winding a strip-shaped lining member, two or more types of strip-shaped lining members may be used in combination. The lining member may be used alone.

  Furthermore, the lining pipe does not necessarily have to be formed by spirally winding a strip-shaped lining member. For example, an arc-shaped lining member may be used, and the lining pipe may be formed by connecting the arc-shaped lining member in the circumferential direction and the pipe axis direction. In this case, for example, the connecting portion in the tube axis direction of the lining member may be provided with extensibility, that is, the connecting portion may be used as an extendable portion so that the lining pipe has extensibility. Even in this case, when constructing the lining pipe, it is preferable that the extensible portion and the annular groove overlap each other.

  It should be noted that the specific numerical values such as the dimensions given above are merely examples, and can be appropriately changed according to necessity such as product specifications.

DESCRIPTION OF SYMBOLS 10 ... Renovated pipe 12 ... Existing pipe 14 ... Lining pipe 16 ... Filler 18 ... Spacer 20 ... Band member 22 ... Connection member 34 ... First fitting part 42 ... Second fitting part 46 ... Extendable part 60 ... Ring Groove 62 ... Sealing member

Claims (6)

A pipe rehabilitation method for forming a rehabilitation pipe in which an existing pipe and a lining pipe are integrated by a filler,
(A) forming an annular groove extending in the circumferential direction at a predetermined position on the inner peripheral surface of the existing pipe;
(B) After the step (a), a sealing member for preventing the filler from entering the annular groove is provided in the annular groove,
(C) After the step (b), constructing a lining member along the inner peripheral surface of the existing pipe to form the lining pipe having extensibility;
(D) A pipe retreading method in which the filler is filled between the inner peripheral surface of the existing pipe and the outer peripheral surface of the lining pipe after the step (c).   The line rehabilitation method according to claim 1, wherein in step (c), a lining pipe having an extendable part is formed.   The pipe line rehabilitation method according to claim 2, wherein in the step (c), the lining pipe is formed so that the extendable portion is arranged at a position overlapping the annular groove in the pipe axis direction of the existing pipe.   In the step (c), a strip plate-shaped lining member is used as the lining member, and the adjacent side edges of the strip-shaped lining member wound spirally are connected to form the lining pipe. The pipe line rehabilitation method according to any one of claims 1 to 3.   The pipe line rehabilitation method according to any one of claims 1 to 4, wherein a lining member having an extendable portion is used as the lining member in the step (c). A rehabilitation pipe in which an existing pipe and a lining pipe are integrated by a filler,
An annular groove formed to extend in the circumferential direction at a predetermined position on the inner peripheral surface of the existing pipe,
A sealing member that is provided in the annular groove and prevents entry of the filler into the annular groove;
The lining pipe having extensibility and formed along the inner peripheral surface of the existing pipe, and
Comprising the filler filled between the inner peripheral surface of the existing pipe and the outer peripheral surface of the lining pipe ;
The lining pipe is a rehabilitated pipe that covers the inner peripheral surface of the existing pipe and the inner surface of the annular groove in a continuous state without being cut at a position overlapping the annular groove .

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