JP4947786B2 - Sewer pipe - Google Patents

Description

  The present invention relates to a sewer pipe, and more particularly, to a sewer pipe that is seismic-resistant so as to ensure water stoppage performance even when a ground change occurs due to an earthquake or the like at a connection portion between a manhole and an existing pipe.

An example of this kind of earthquake resistance method is proposed in Patent Document 1 and Patent Document 2. In both Patent Documents 1 and 2, the manhole and the sewer pipe are connected using an elastic joint. Even if the existing pipe is detached from the manhole due to ground change when an earthquake occurs, the watertightness is maintained by the expansion and contraction of the elastic joint.
JP 2003-105788 A [E02D 29/12 F16L 41/08] JP 2006-307540 A [E02D 29/12 F16L 41/08]

  The background art proposed in Patent Document 1 and Patent Document 2 is applicable to existing pipes only or existing pipes with integrated rehabilitation pipes. It is extremely difficult to apply to sewage pipes with pipes. This is because the rehabilitation pipe provided by the forming method is considered to behave differently from the existing pipe when the ground changes.

  Therefore, the main object of the present invention is to provide a novel sewer line.

  Another object of the present invention is to provide a sewer pipe which has been rehabilitated by another rehabilitation pipe and which has been made earthquake resistant.

The invention of claim 1, and an existing connected to manhole and manhole tube, and the existing pipe inside the existing pipe by installing a rehabilitating pipe displaced independently an existing pipe in the rehabilitating pipe Rehabilitated sewage pipes, which are installed between existing pipes and rehabilitation pipes, at a predetermined position farther from the manhole than the amount of displacement the rehabilitation pipe comes out of the manhole in the event of an earthquake with a predetermined maximum ground deformation. It is a sewer pipe provided with the water stop member which contacts the outer surface of a rehabilitation pipe .

In the first aspect of the invention, in the sewage pipe (10: reference number when the corresponding part is exemplified in the embodiment, the same applies hereinafter), the sewage pipe (14) is connected between the manholes (12), The sewer pipe includes an existing pipe (16) and a rehabilitation pipe (18) provided therein by, for example, a forming method. A water stop member is provided at a predetermined position determined in relation to the amount of withdrawal (L2), and at the predetermined position, the water stop member (20, 20a, 26, 26A) directly contacts the outer periphery of the rehabilitation pipe. Stop the water.

According to the first aspect of the present invention, water is stopped by the water stop member at a predetermined position determined according to the maximum amount of ground fluctuation that can be assumed. There is no leakage.

The invention of claim 2 has a manhole and an existing pipe connected to the manhole, and a rehabilitation pipe which is displaced independently of the existing pipe is installed inside the existing pipe, and the inside of the existing pipe with the rehabilitation pipe Rehabilitated sewage pipes, at least from a pipe end of an existing pipe to a predetermined position farther away from the manhole than the amount of displacement that the rehabilitated pipe escapes from the manhole in the event of an assumed maximum ground deformation A water stop member having a short pipe portion having a length and fixedly disposed between the existing pipe and the rehabilitation pipe , wherein the short pipe part contacts the outer surface of the rehabilitation pipe at a predetermined position, and at least the first A short pipe portion having a second length shorter than that of the water stop member and interposed between the short pipe portion of the water stop member and the rehabilitation pipe, and exposing the short pipe portion of the water stop member at least at a predetermined position a protective member for a sewage pipe.

  In the invention of claim 3, the water stop member (20) has a short pipe portion (20a) having a first length, and the protective member (22) has a second length shorter than the first length. The short pipe part (22a) which has and has the short pipe part of this protection member covers the short pipe part of a water stop member, and is exposed in a predetermined position. Water is stopped at the outer periphery of the rehabilitation pipe by the short pipe portion of the water stop member.

According to a third aspect of the present invention, the water stop member includes a short pipe having a first length from a pipe end of the existing pipe to a predetermined position, and a flange formed to extend from one end of the short pipe, There is secured to the inner wall of the manhole, a sewer pipe of claim 1, wherein.

  In the invention of claim 4, water is stopped at the outer periphery of the rehabilitation pipe by the short pipe of the water stop member (20).

The invention of claim 4 has a manhole and an existing pipe connected to the manhole, and a rehabilitation pipe that is displaced independently of the existing pipe is installed inside the existing pipe, and the inside of the existing pipe with the rehabilitation pipe Rehabilitated sewage pipes, located between existing pipes and rehabilitation pipes, at a predetermined position farther from the manhole than the amount of displacement that the rehabilitation pipe is pulled out of the manhole in the event of an earthquake with a predetermined maximum ground deformation And a water stop member that contacts the outer surface of the rehabilitated pipe, and the water stop member is disposed at a predetermined position on the inner surface of the existing pipe to stop water between the inner surface of the existing pipe and the outer surface of the rehabilitated pipe. including water stop ring, a sewage pipe.

  In the invention of claim 5, the first water stop ring (26, 26A) stops water on the outer surface of the rehabilitation pipe (18). However, the water stop ring is a concept including a rubber ring and an O (O) ring.

The invention of claim 5, further comprising the waterproofing ring receiving portion formed at a predetermined position of the inner surface of the existing pipe, the first waterproof ring is accommodated in the waterproofing ring-accepting part, claim 4 Sewage pipeline as described.

  In the invention of claim 6, the water stop ring accommodating portion (28) is formed on the inner surface of the existing pipe (16), and the rubber ring (26) is accommodated therein.

The invention of claim 6 further includes a housing having an outer surface along the inner surface of the existing pipe, and a water stop ring housing portion formed on the inner surface, wherein the first water stop ring is housed in the water stop ring housing portion, The housing is a sewer pipe according to claim 4 , wherein the housing is fixed between the existing pipe and the rehabilitation pipe so that the first water stop ring is located at a predetermined position.

  According to the seventh aspect of the present invention, the housing (30) is used, and the outer surface of the housing is designed to be along the inner surface of the existing pipe, and the water stop ring accommodating portion (28A) is formed on the inner surface of the housing. The 1st water stop ring (26A) is accommodated in the water stop ring accommodating part (28A), and the 1st water stop ring water-stops the renovated pipe.

According to a seventh aspect of the present invention, the housing includes a short tube-shaped first portion and a second portion formed in a flange shape from one end of the first portion, and a first water stop is provided on the inner surface of the first portion. A water-stop ring storage portion for storing the ring is provided, and further, another water-stop ring storage portion formed on the outer surface of the second portion, and another water-stop ring storage portion, and the second portion and the inner wall of the manhole It comprises another waterproofing ring for water stopping between a sewer pipe of claim 6 wherein.

  In the invention of claim 8, the housing (30A) includes a first portion (30Aa) having a short tube shape and a second portion (30Ab) having a flange shape extending from one end thereof, and the inner surface and the second portion of the first portion. First and second water stop ring accommodating portions (28A, 28B) are formed on the outer surfaces of the first and second water stop rings (26A, 26B), respectively. Therefore, the first water stop ring stops water on the outer surface of the rehabilitation pipe, and the second water stop ring stops water on the inner wall of the manhole.

The invention according to claim 8 is the sewage pipe according to any one of claims 1 to 7 , wherein the predetermined position is a position calculated at 1.5% of half of the span length of the rehabilitation pipe.

  In the invention of claim 9, the predetermined position for stopping the rehabilitation pipe is calculated by L1 / 2 × 1.5%, for example. Therefore, even if there is a maximum amount of ground fluctuation that can be assumed, water stoppage can be reliably maintained.

  According to this invention, even if there is ground change such as an earthquake, the water stop member stops the outer surface of the rehabilitated pipe, so that the water stop performance can be maintained.

  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.

  Referring to FIG. 1, a sewage pipe 10 according to an embodiment of the present invention includes a manhole 12 embedded in the soil and having an upper end entrance exposed to the ground, and the manholes 12 are laid in the soil. Connected by the sewer pipe 14. The sewage pipe 14 is sometimes called an inflow pipe on the inflow side of the manhole 12 and is sometimes called an outflow pipe on the outflow side. Although not explicitly shown in FIG. 1, the sewage pipe 10 in this embodiment is a natural sewage sewage pipe, so that the sewage pipe 14 is installed with a gradient. Furthermore, although omitted in FIG. 1, a ladder or a step is provided in the manhole 12 for a person to enter and exit.

  The sewage pipe 14 includes, for example, an existing pipe 16 such as a concrete pipe or a ceramic pipe, and a rehabilitation pipe 18 installed therein separately from the existing pipe 16. The rehabilitation pipe 18 is, for example, a PVC pipe, and is provided in the existing pipe 16 by a forming method such as the EX method (name of the rehabilitation method). In the forming method, since the backfilling material such as mortar is not injected between the rehabilitated pipe 18 and the existing pipe 16, the rehabilitated pipe 18 is displaced in the existing pipe 16 independently of the existing pipe 16. . That is, the rehabilitation pipe 18 and the existing pipe 16 behave differently. The present invention is intended to be applied to a sewer line having a rehabilitation pipe which is independent (not integral) from such an existing pipe.

  FIG. 2 is an enlarged view of the connecting portion between the manhole 12 and the sewage pipe 14 in the embodiment shown in FIG. 1. After the existing pipe 16 is inserted into the hole formed in the wall of the manhole 12, as shown in FIG. The existing pipe 16 is connected to the manhole 12 by filling the gap between the outer surface of the existing pipe 16 and the inner surface of the hole with, for example, mortar 13. And the laminated body of the water stop member 20 and the protection member 22 is inserted between the existing pipe 16 and the rehabilitation pipe 18. However, since each part becomes too fine in FIG. 1, the manhole 12 and the sewer pipe 14 are mainly shown in order to clarify the whole structure.

  As shown in FIG. 2, the rehabilitation pipe 18 is inserted into the existing pipe 16 so as to protrude inward from the inner wall 12 a in the manhole 12. This is because it is considered that the rehabilitation pipe 18 expands and contracts due to a temperature change. The amount of protrusion of the rehabilitation pipe 18 inward is, for example, about 5 cm.

  The water stop member 20 is formed of a synthetic rubber such as a water expansion rubber or SBR (styrene butadiene rubber) as a whole, and a short pipe 20a interposed between the existing pipe 16 and the rehabilitation pipe 18, for example. A flange 20b that extends from one end of the short tube 20a in a direction orthogonal to the axis of the short tube 20a and has a circular outer periphery is included. The protective member 20 is formed of, for example, a metal such as SUS (stainless steel) or a resin such as polyethylene as a whole, and a short pipe 22a interposed between the existing pipe 16 and the renovated pipe 18 and the short pipe 22a. It includes a flange 22b that extends from one end in a direction perpendicular to the axis of the short tube 22a and has a circular outer periphery.

  The flange 20b of the water blocking member 20 and the flange 22b of the protection member 22 are both fixed to the inner wall 12a of the manhole 12 by an anchor 24 that functions as an attachment member slightly inside the outer peripheral edge thereof. In the embodiment, the two flanges 20b and 22b are formed to have substantially the same size and are fixed together by one anchor 24. However, the two flanges 20b and 22b may have different sizes and be fixed to the inner wall 12a by separate mounting members. Good. By fixing the flanges 20b and 22b to the inner wall 12a of the manhole 12, the short tubes 20a and 22a can be fixedly held between the existing tube 16 and the rehabilitated tube 18 as a result.

  The protection member 22 is for protecting the water stop member 20. The water stop member 20 and the rehabilitation pipe 18 are insulated by the protection member 22 so that the water stop member 20 does not expand and contract when the rehabilitation pipe 18 is displaced in the axial direction, and the water stop member 20 is damaged. To prevent. The protection member 22 also has a function of smoothing the axial displacement of the rehabilitation pipe 18, and the smooth movement of the rehabilitation pipe 18 causes damage to the water stop member 20 due to the displacement of the rehabilitation pipe 18. Can be as small as possible.

  However, since the water stop member 20 needs to be in direct contact with the rehabilitation pipe 18 at a necessary portion, in this embodiment, the length (first length) of the short pipe 20a of the water stop member 20 is the protection member 22. The short pipe 20a of the water blocking member 20 is longer at the other end (the side where the flange 20b is formed is “one end”). It protrudes (exposes) from the protective member 22 by a difference in length (= first length−second length). That is, the water stop member 20 is in direct contact with the rehabilitation pipe 18 on the other end side of the short pipe 20a. This contact position is a “predetermined position”, and at this predetermined position, the water stop member 20 stops the outer surface of the rehabilitated pipe 18 (between the existing pipe 16 and the rehabilitated pipe 18). Since the existing pipe 16 is disconnected or the existing pipe is originally damaged, water may leak from between the existing pipe 16 and the rehabilitation pipe 18, and water can be stopped even in such a case.

  The predetermined position is set to a position of L2 (= L1 / 2 × 1.5%) with respect to the span length L1 (FIG. 1) of the rehabilitation pipe 18. The reason why L1 / 2 is set is that one span length is shared by two manhole connection portions. When L1 = 50 m, L2 is 37.5 cm (about 40 cm). However, “1.5%” mentioned here is a number recognized as the maximum possible size (ratio) of ground deformation due to a large-scale earthquake in, for example, the guidelines of the Sewerage Association. In this embodiment, since the rehabilitation pipe 18 protrudes inward of the manhole 12, even if the rehabilitation pipe 18 comes out to the maximum, the water stop member 20 maintains a state in contact with the rehabilitation pipe 18. When the rehabilitation pipe 18 is installed without protruding into the manhole 12, it is necessary to set the position at L2 = (L1 / 2 × 1.5%) + α. However, “α” is not limited, but is assumed to be about 5 cm.

  In the embodiment shown in FIGS. 1 and 2, assuming that a ground change due to an earthquake occurs in the direction indicated by the arrow in FIG. 3, the pipe end 16a of the existing pipe 16 is separated from the inner wall 12a of the manhole 12 as shown in FIG. Displace to the outside. However, although FIG. 3 illustrates the case where the pipe end 16a of the existing pipe 16 remains within the wall thickness of the manhole 12, the existing pipe 16 may be completely detached from the manhole 12 depending on the extent of the earthquake. . On the other hand, the rehabilitation pipe 18 is also displaced in the same arrow direction as the existing pipe 18, and the pipe end 18 a moves away from the inner wall 12 a of the manhole 12. Since the rehabilitation pipe 18 behaves differently from the existing pipe 16, the displacement amount may be different even if it is displaced in the same direction. In FIG. 3, the displacement amount of the rehabilitation pipe 18 is larger than that of the existing pipe 16. Illustrates the large case. Even in such a case, the water stop member 20 is in direct contact with the outer surface of the rehabilitation pipe 18 at a predetermined position that correlates with the maximum amount of displacement that can be assumed, that is, the distance L2. Can stop water. Therefore, even if the existing pipe 16 is completely detached from the manhole 12, or if the mortar 13 is damaged until the existing pipe 16 is not completely detached from the manhole 12, there is water leakage. Since the water can be stopped on the outer surface of the rehabilitation pipe 18 by the water stop member 20, this sewer pipe can be used even immediately after the earthquake, and a complete restoration can be awaited later.

  2 and 3, the tips of the short pipe 20a of the water stop member 20 and the short pipe 22a of the protection member 22 of this embodiment (ends far from the manhole 12) are, for example, outer surfaces. It is formed as thin as possible, for example by forming a tapered shape. The reason is that when the rehabilitating pipe 18 is displaced toward the manhole 12, the outer surface of the rehabilitating pipe 18 further spreads outward along the taper surface in order to prevent the water stop member 20 from turning up. In this way, the outer surface of the rehabilitation pipe 18 is brought into close contact with the short pipe 20a of the water-stopping member 20 as much as possible to improve water-stopping.

  FIG. 4 is an illustrative view showing a main part of another embodiment of the present invention, and this embodiment is the same as the embodiment shown in FIGS. 1 and 2 except for the following points. Therefore, the overlapping description is omitted here. In FIG. 4, a part including a later-described easy extension portion 22 c is enlarged and shown in a circle.

  The water stop member 20 of this embodiment is different from the short tube 20a similar to the water stop member of the previous embodiment and the water stop member of the previous embodiment formed at one end of the short tube 20a. And a flange 20bA. The flange 20bA includes an easily extending portion 20c so that the flange 20bA can extend (extend) in the radial direction of the flange (the vertical direction in FIG. 4). In this embodiment, the easily extending portion 20c is formed in a folded shape, but is not limited thereto. For example, any shape may be used as long as it can be easily deformed and the flange 20bA can be extended as a result, such as a bellows shape. Shape can be adopted.

  In the embodiment of FIG. 4, the existing pipe 16 and the rehabilitated pipe 18 are displaced in the axial direction when subjected to ground fluctuation due to an earthquake, but as shown in FIG. 5, the other end of the short pipe 20 a of the water stop member 20 The water stoppage is maintained by contact with the outer surface of the rehabilitation pipe 18. At this time, since the flange 20bA extends in the easy extension portion 20c, even if a force in the extending direction of the flange 20bA is applied to the water stop member 20 due to ground fluctuation, damage to the water stop member 20 can be avoided.

  In both the embodiment of FIG. 2 and the embodiment of FIG. 4, the water blocking member 20 is covered with the protective member 22. However, the protective member 22 is not essential and may be omitted depending on circumstances. Good.

  In these embodiments, the flange 20b or 20bA of the water stop member 20 and the flange 22b of the protection member 22 are both fixed to the inner wall 12a of the manhole 12. However, it is sufficient that at least the flange 20b or 20bA of the water blocking member 20 is fixed to the inner wall 12a, and the flange 22b of the protection member 22 is not necessarily fixed to the inner wall 12a.

  FIG. 6 is an illustrative view showing a main part of another embodiment of the present invention. In this embodiment, the water stop member 20 and the protection member 22 used in the previous embodiment are not used. However, since the sewage pipe 14, that is, the existing pipe 16 and the rehabilitation pipe 18, are the same as those in the previous embodiment, the description regarding the overlapping parts will be omitted below.

  The water stop member of this embodiment is a rubber ring 26. The rubber ring 26 is also made of synthetic rubber like the water stop member, and has a rubber ring groove (rubber ring housing portion) formed on the inner surface of the existing pipe 16 at the predetermined position (position at a distance L2 from the inner wall of the manhole). ) 28.

  In the embodiment shown in FIG. 6, when an earthquake occurs, the rehabilitation pipe 18 is displaced in a direction in which the pipe end 18a moves away from the inner wall 12a of the manhole 12 as shown in FIG. However, even if the ground fluctuation is large, the distance L2 (predetermined position) is a position designed in consideration of the maximum ground fluctuation amount that can be assumed, so that the pipe end 18a of the rehabilitation pipe 18 exceeds the position of the rubber ring 26. Therefore, it does not move further away from the manhole 12. Therefore, the outer surface of the rehabilitation pipe 18 is always stopped by the rubber ring 26, and water does not leak from the sewer pipe during an earthquake.

  In the embodiment of FIG. 6, a rubber ring groove 28 for accommodating the rubber ring 26 is directly formed on the inner surface of the existing pipe 16. Therefore, it is considered that the strength of the existing pipe 16 is slightly impaired. Since the rehabilitated pipe 18 to which the present invention is applied can maintain the function of the sewer pipe even if the existing pipe 16 itself is broken or damaged, even if the existing pipe 16 is broken by the rubber ring groove 28, it is particularly a problem. However, if the rubber ring 26 is destroyed by an earthquake, the rubber ring 26 may not function as a water-stopping member. Therefore, if the rubber ring groove 28 is formed directly on the existing pipe 16, the strength is reduced, which is inconvenient. There may be.

  Therefore, in the modified embodiment shown in FIG. 8, the rubber ring groove 28 is not directly formed in the existing pipe 16, but an adapter or housing 30 for forming the rubber ring groove is used. As shown in FIG. 9, the housing 30 is a relatively thin tube such as polyvinyl chloride or stainless steel, and the outer surface thereof is selected to have a size (outer diameter) along the inner surface of the existing tube 16. A rubber ring groove 28A is formed on the inner surface. As can be seen from FIG. 8, the inner surfaces of both ends of the housing 30 are formed so as to be inclined so as to become thinner toward the end. The reason is the same as that in the previous embodiment, the tips of the short tube 22a of the protective member and the short tube 20a of the water stop member 20 are made thin. However, this is not shown in FIG. Then, the housing 30 is fixed on the inner surface of the existing pipe 16 as shown in FIG. 8 so that the rubber ring groove 28A, that is, the rubber ring 26A is positioned at the predetermined position at the distance L2 from the inner wall 12 of the manhole 12. To arrange. For example, if a filling adhesive such as epoxy is used, the housing 30 can be easily bonded onto the inner surface of the existing pipe 16.

  In the embodiment of FIG. 8, as in the embodiment of FIG. 6, the outer surface of the rehabilitated pipe 18 is always stopped by the rubber ring 26A even if there is a ground change, and the water stopping function by the rubber ring 26A. Is demonstrated.

  In the embodiment of FIG. 8, in order to hold the housing 30, that is, the rubber ring 26A in a more stable position, the housing 30 may be fitted into a concave ring formed by slightly scraping the inner surface of the existing pipe 16.

  In the embodiment of FIG. 8, the short tubular housing 30 is used to form the rubber ring groove 28 </ b> A separately from the existing pipe 16. On the other hand, the housing 30A is used in the embodiment of FIG. The housing 30A may also be formed of, for example, polyvinyl chloride or stainless steel. The housing 30A includes a short pipe 30Aa for holding the first rubber ring groove 28A and a short pipe from one end of the short pipe 30Aa. The flange 30Ab extends in a direction orthogonal to the axial direction of 30Aa and has a circular outer periphery. The flange 30Ab extends along the inner wall 12a of the manhole 12 and is fixed or fixed to the manhole inner wall 12a by the anchor 24 slightly inside the outer peripheral edge.

  A second rubber ring groove (rubber ring accommodating portion) 28B is formed on the outer surface of the flange 30Ab of the housing 30A, that is, the surface facing the manhole inner wall 12a, and the rubber ring 26B is accommodated in the rubber ring groove 28B. .

  In this embodiment, the water stop between the rehabilitation pipe 18 and the existing pipe 16 is performed by the first rubber ring 26A, and the second rubber ring 28B shares the water stop on the manhole inner wall 12a. For example, assuming that the existing pipe 16 is detached from the manhole 12 due to an earthquake or the mortar around the existing pipe 16 is damaged, in this case, if there is no second rubber ring 28B, the hole of the manhole 12 or the existing Water leakage occurs around the pipe 16. However, if the second rubber ring 28B is provided, the water is stopped between the manhole inner wall 12a and the flange 30Ab by the rubber ring 28B. Therefore, even in such a case, the water stop can be maintained. However, the water stop effect by the rubber ring 26A is the same as the rubber ring 26A of the embodiment of FIG. 8 and the rubber ring 26 of the embodiment of FIG.

  In the embodiment of FIG. 6, the embodiment of FIG. 8, and the embodiment of FIG. 10, the rubber rings 26, 26A, 26A and 26B are used as the water stop ring, and these rubber rings are used as the rubber ring grooves 28, 28A. 28A and 28B. However, these rubber rings are not necessarily housed in the rubber ring groove. The water stop ring may have a packing shape without a rubber ring groove. The present invention is intended to include both of these, and rubber rings and O-rings can be used as the water stop ring.

Further, in the embodiment of FIG. 10, only one rubber ring 26A is disposed on the outer surface of the flange 30Ab of the housing 30A on the inner side of the anchor 24. However, although not shown, it is conceivable to provide a third rubber ring (or O-ring) further outside the anchor 24. If the water stop ring (rubber ring) 26B is installed only inside the anchor 24, if the existing pipe protrudes (enters) into the manhole 12, the inside from the anchor 24 will rise from the manhole inner wall 12a. If there is only 26B, a gap will be formed between the rubber ring 26B and the inner wall of the manhole, causing water leakage. On the other hand, if a water stop ring (not shown) is installed between the flange 30Ab and the inner wall 12a on the outside of the anchor 24, the flange 30Ab supports the anchor 24 in this case. Therefore, it acts in the direction in which the water stop ring is pressed against the inner wall 12a. Accordingly, water stoppage between the flange 30Ab and the inner wall 12a can be performed more reliably.

  In each of the above-described embodiments, the water stop member 20, the protection member 22, the rubber ring 26, the rubber ring 26A, the housing 30, and the like are attached before the existing pipe 16 is rehabilitated with the rehabilitation pipe. These parts may be arranged after rehabilitation. In order to install after rehabilitation, for example, the rehabilitation pipe is heated and softened only at the necessary part, once reduced in diameter, and necessary parts such as a water-stopping member are placed in that state, and then the reduced diameter part is packed in the packer (heated) A balloon-like one for expanding the diameter while giving steam to the rehabilitation pipe) can be made to follow the existing pipe as it was.

  Furthermore, in any of the above-described embodiments, the water stop member stops the outer surface of the rehabilitation pipe 18 at least at a position (predetermined position) at a distance L2 from the pipe end of the rehabilitation pipe 18. The predetermined position is not necessarily determined in correlation with the distance L2, and may be set at a position closer to the manhole 12 than the distance L2, or may be set at a position farther from the manhole 12 than the distance L2.

  And the rehabilitation pipe | tube of each Example assumed what arranged the polyvinyl chloride pipe | tube in the existing pipe | tube by EX construction method. However, the rehabilitation pipe is not limited to a PVC pipe, but includes a reversal pipe such as FRP.

FIG. 1 is an illustrative view showing a sewage pipe of one embodiment of the present invention. FIG. 2 is an illustrative view showing an enlarged main portion of the sewage pipe shown in FIG. FIG. 3 is an illustrative view showing an example of a behavior when a ground change occurs in the sewage pipeline of the embodiment shown in FIGS. 1 and 2. FIG. 4 shows another embodiment of the present invention, and is an illustrative view showing a main part corresponding to FIG. FIG. 5 is an illustrative view showing one example of behavior when ground fluctuation occurs in the sewage pipeline of the embodiment shown in FIG. 6 shows still another embodiment of the present invention and is an illustrative view showing a main part corresponding to FIG. FIG. 7 is an illustrative view showing one example of a behavior when a ground change occurs in the sewage pipeline of the embodiment of FIG. FIG. 8 shows a modification of the embodiment of FIG. 6 and is an illustrative view showing a main part corresponding to FIG. FIG. 9 is an illustrative view showing a housing used in the embodiment shown in FIG. FIG. 10 shows still another embodiment of the present invention and is an illustrative view showing a main part corresponding to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Sewage pipe 12 ... Manhole 14 ... Sewage pipe 16 ... Existing pipe 18 ... Rehabilitation pipe 20 ... Water stop member 20a ... Short pipe 20b, 20bA ... Flange 22 ... Protection member 22a ... Short pipe 22b ... Flange 24 ... Anchor 26, 26A, 26B ... Rubber wheel 28, 28A, 28B ... Rubber ring housing (rubber ring groove)
30, 30A ... Housing 30Aa ... Short pipe 30Ab ... Flange

Claims (8)

Manhole and has a existing pipe that is connected to the manhole, said internal to said existing pipe in the existing pipe by installing a rehabilitating pipe displaced independently a sewer line was retreaded with the rehabilitating pipe ,
It is provided between the existing pipe and the rehabilitated pipe, and the rehabilitated pipe is located at a predetermined position farther from the manhole than the displacement amount of the rehabilitated pipe coming out of the manhole at the time of an earthquake with a predetermined maximum ground deformation amount. A sewer pipe provided with a water stop member in contact with the outer surface . A sewer pipe that has a manhole and an existing pipe connected to the manhole, has a rehabilitation pipe that is displaced independently of the existing pipe, and is rehabilitated by the rehabilitation pipe. ,
From at least the pipe end of the existing pipe, and having a first length from the manhole during earthquake assumed predetermined maximum ground deformation amount to a predetermined position away from the manhole than the displacement amount of the rehabilitating pipe comes out A water stop member having a short pipe portion fixedly disposed between the existing pipe and the rehabilitation pipe , wherein the short pipe portion contacts an outer surface of the rehabilitation pipe at the predetermined position; and at least the first A short pipe portion having a second length shorter than that of the water stop member and interposed between the short pipe portion and the rehabilitation pipe of the water stop member, and at least the predetermined position of the water stop member a protective member to expose the short pipe section, the lower water conduit. The water stop member includes a short pipe having a first length from a pipe end of the existing pipe to the predetermined position, and a flange formed to extend from one end of the short pipe, and the flange is It is secured to the inner wall of the manhole, sewer pipe of claim 1, wherein. A sewer pipe having a manhole and an existing pipe connected to the manhole, and a rehabilitation pipe that is displaced independently of the existing pipe is installed inside the existing pipe, and the existing pipe is rehabilitated by the rehabilitation pipe Road,
Provided between the existing pipe and the rehabilitated pipe, the rehabilitated pipe at a predetermined position farther from the manhole than the amount of displacement of the rehabilitated pipe coming out of the manhole in the event of an assumed maximum ground deformation amount A water stop member that contacts the outer surface of the
The water stop member is disposed in the predetermined position of the inner surface of the existing pipe, comprising a first water-stopping ring to stop the water between the inner surface and the outer surface of the rehabilitating pipe of the existing pipe, the lower water pipe . The sewage pipe line according to claim 4 , further comprising a water stop ring housing portion formed at the predetermined position on the inner surface of the existing pipe, wherein the first water stop ring is housed in the water stop ring housing portion. It further includes a housing having an outer surface along the inner surface of the existing pipe, and a water stop ring accommodating portion formed on the inner surface,
The first water stop ring is housed in the water stop ring housing portion, and the housing is fixed between the existing pipe and the renovated pipe so that the first water stop ring is located at the predetermined position. The sewage pipeline according to claim 4 . The housing includes a first portion having a short tube shape and a second portion formed to extend from one end of the first portion into a flange shape,
A water stop ring housing portion for housing the first water stop ring is provided on the inner surface of the first portion, and another water stop ring housing portion formed on the outer surface of the second portion; and The sewage pipeline according to claim 6 , further comprising another water stop ring that is received in a water ring storage portion and stops water between the second portion and the inner wall of the manhole. The sewage pipe according to any one of claims 1 to 7 , wherein the predetermined position is a position calculated by 1.5% of a half of a span length of the rehabilitation pipe.

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