Inner surface component connecting material and lining structure of pipeline equipped with same

Abstract

To provide an inner face member connecting material which can improve workability while securing water tightness, and a conduit lining structure having the same.SOLUTION: An inner face member connecting material has a wall face part opposing sidewall parts of inner face members when the inner face members are connected to each other, insertion parts arranged at both end parts of the wall face part of a conduit in a peripheral direction, protruding to an inner face side of the conduit, respectively, and inserted into recessed inserted parts of the inner face members, and a connection part 34 sandwiched between the two inner face members when the inner face members are connected to each other. The connection part 34 has a base part 34a, and abutment parts 34b arranged at both sides of the base part 34a in a longitudinal direction, having a first end face 34e opposing end faces of the sidewall parts in the longitudinal direction, and second end faces 34f opposing end faces of the recessed inserted parts in the longitudinal direction, and composed of an elastic body.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to an inner surface member connecting material used in a lining structure of a pipeline for reinforcing an existing pipeline, and to a lining structure of a pipeline equipped with the same. [Background technology]

[0002] Various techniques for completely covering the inner surface of a pipeline with reinforcing materials have been proposed as techniques for reinforcing existing pipelines such as aging water pipes, sewer pipes, or agricultural irrigation pipes. For example, an existing pipe repair structure suitable for covering the inner surface of a large-diameter pipeline that allows people to enter and work inside the pipeline is known (see, for example, Patent Document 1). The existing pipe repair structure described in Patent Document 1 involves connecting pipe-shaped rehabilitation pipe components, each consisting of a plurality of strip-shaped sections, sequentially in the longitudinal direction of the pipeline. The rehabilitation pipe components are connected to each other via joining members. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-196802 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the existing pipe repair structure of Patent Document 1 is configured to fit a joining member into a band-shaped portion, which can leave a small gap between the band-shaped portion and the joining member, allowing water to seep in. To address this issue, it is possible to seal the gap with a resin sealant such as silicone sealant. However, applying and drying the sealant is time-consuming.

[0005] An object of the present invention is to provide an inner surface member connecting material that can improve workability while ensuring watertightness, and a pipeline lining structure that includes the same. [Means for solving the problem]

[0006] The present invention relates to an inner surface member connecting member that connects, in the longitudinal direction of a pipeline, inner surface members that are attached to the inner periphery of a pipeline reinforcement member that is disposed along the inner surface of the pipeline, each of the inner surface members having a side wall portion that covers the inner surface of the pipeline along the longitudinal direction, and recessed inserted portions that are provided at both ends of the side wall portion in the circumferential direction of the pipeline, each protruding toward the inner surface of the pipeline, and continuously formed along the longitudinal direction, and a wall surface portion that faces the side wall portion when the inner surface members are connected, and a front the connecting portion has a base portion and abutting portions made of an elastic body, the abutting portions being provided on both sides of the base portion in the longitudinal direction, each having a first end surface facing the end surface of the side wall portion in the longitudinal direction, and a second end surface facing the end surface of the inserted recessed portion in the longitudinal direction, the connecting portion having a base portion and a first end surface facing the end surface of the inserted recessed portion in the longitudinal direction, the connecting portion having a first end surface facing the end surface of the side wall portion in the longitudinal direction, and a second end surface facing the end surface of the inserted recessed portion in the longitudinal direction, the connecting portion having a base portion and a first end surface facing the end surface of the inserted recessed portion in the longitudinal direction, the connecting portion having a first end surface facing the end surface of the side wall portion in the longitudinal direction, the connecting portion having a second end surface facing the end surface of the inserted recessed portion in the longitudinal direction, the connecting portion having a base portion and ... first end surface facing the end surface of the side wall portion in the longitudinal direction, the connecting portion having a first end surface facing the end surface of the inserted recessed portion in the longitudinal direction, the connecting portion having a first end surface facing the end surface of the inserted recessed portion in the longitudinal direction, the connecting portion having a second end surface facing the end surface of the inserted recessed portion in the longitudinal direction, the connecting portion having a second end surface facing the end surface of the inserted recessed portion in the longitudinal direction, the connecting portion having a second end surface facing the end surface of the inserted recessed The base portion is separate from the contact portion and is made of a material harder than the contact portion. It is characterized by: [Effects of the Invention]

[0007] According to the present invention, a first end surface of the abutting portion made of an elastic body abuts against an end surface of the side wall portion in the longitudinal direction, and a second end surface of the abutting portion abuts against an end surface of the concave insertion portion in the longitudinal direction. When the inner members are connected to each other, the abutting portion elastically deforms, thereby filling minute gaps between the connecting portion and the inner members. This ensures watertightness at the connection portion between the inner members. Furthermore, because there is no need to seal the gaps with a resin sealant or the like, workability when connecting longitudinally adjacent inner members can be improved and the time required for the work can be reduced. [Brief explanation of the drawings]

[0008] [Figure 1] This is an explanatory diagram of the structure of the lining structure, and shows the existing pipeline and the lining structure cut in a vertical cross section along their longitudinal direction. [Figure 2] 2 is a cross-sectional view taken along the line AA in FIG. 1. [Figure 3] FIG. 3 is an enlarged view of part B in FIG. 2. [Figure 4] 1 is a cross-sectional view taken along the longitudinal direction of an existing pipeline, showing a state in which only a pipeline reinforcement material is disposed along the inner surface of the existing pipeline. FIG. [Figure 5] FIG. 2 is a front view of the inner surface member shown in FIG. [Figure 6] FIG. 2 is a perspective view of the inner surface member connecting member shown in FIG. [Figure 7] FIG. 10 is a perspective view of the inner surface member connecting member, excluding the connecting portion. [Figure 8] 8 is an enlarged view of a central portion C in the longitudinal direction of the insertion portion in FIG. 7. FIG. [Figure 9] FIG. 7 is a perspective view of the connection portion shown in FIG. 6. [Figure 10] FIG. 10 is a perspective view showing a state in which an inner member connecting member is being inserted into the inner member. [Figure 11] 10 is a front view of the inner surface member, showing the state in which the inner surface member connecting member is fitted into the inner surface member. FIG. [Figure 12] 1 is a cross-sectional view of an existing pipeline showing a state before an inner surface member is disposed along the inner surface of the existing pipeline. FIG. [Figure 13] FIG. 10 is a cross-sectional view of the existing pipeline showing the state after lining of the existing pipeline has been completed. [Figure 14] FIG. 10 is a perspective view of an inner surface member connecting member according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] A pipeline lining structure employing an inner surface member connecting material according to one embodiment of the present invention will be described below with reference to the drawings. The pipeline lining structure according to the present invention is a lining structure suitable for covering and reinforcing the inner surfaces of existing pipelines such as aged water pipes, sewer pipes, or agricultural water pipes, but is also a technology that can be applied when covering the inner surfaces (secondary lining) of these newly constructed pipelines.

[0010] (Interior structure configuration) FIG. 1 is a structural explanatory diagram of a lining structure 100 according to the present invention, showing an existing pipeline P and the lining structure 100 cut in a vertical cross section along their longitudinal direction. FIG. 2 shows a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 shows an enlarged view of part B in FIG. 2. FIG. 4 is a cross-sectional view along the longitudinal direction of the existing pipeline P, illustrating the pipeline reinforcement material 1 alone, disposed along the inner surface of the existing pipeline P, for explaining the pipeline reinforcement material 1. As will be described later, after the lining structure 100 is constructed in the existing pipeline P, a self-hardening filler 99 is filled into the backfill filling space S (see FIG. 13). However, FIGS. 1 to 3 show the state before the self-hardening filler 99 is filled.

[0011] As shown in Figures 1 to 3, the lining structure 100 has a pipe reinforcement material 1, a fitting member 4, an inner surface member 2, and an inner surface member connecting member 3, and is configured in a tubular shape that fits along the inner surface of an existing pipe P. The pipe reinforcement material 1 is in the form of a hollow frame, and is disposed along the inner surface of the existing pipe P. A plurality of fitting members 4 are disposed on the inner circumferential side of the pipe reinforcement material 1. The inner surface member 2 is attached to the pipe reinforcement material 1 via the plurality of fitting members 4.

[0012] (Pipe reinforcement material) 2 and 4, the pipeline reinforcement material 1 has a ring-shaped reinforcing member 11 and a connecting member 12. The ring-shaped reinforcing members 11 are ring-shaped, and a plurality of them are arranged at predetermined intervals along the longitudinal direction of the existing pipeline P. As shown in FIG. 3, a plurality of fitting portions 11a into which fitting members 4 are fitted are formed on the inner circumferential side of the ring-shaped reinforcing member 11 at equal intervals in the circumferential direction of the existing pipeline P.

[0013] The material of the ring-shaped reinforcing member 11 is preferably steel from the viewpoints of cost and strength, but is not particularly limited, and it can also be carbon steel, stainless steel, synthetic resin, etc. Furthermore, the ring-shaped reinforcing member 11 may be formed, for example, by interconnecting a plurality of arc-shaped members divided in the circumferential direction.

[0014] 4, a plurality of connecting members 12 connect the ring-shaped reinforcing members 11 to one another. By connecting the ring-shaped reinforcing members 11 to one another with a plurality of connecting members 12, the pipeline reinforcing member 1 is configured to have a hollow cylindrical shape.

[0015] As shown in Fig. 4, the connecting member 12 includes a pipe member 12c, a connecting bolt 12a, and a nut 12b. The pipe member 12c is disposed between two adjacent ring-shaped reinforcing members 11 in the longitudinal direction of the existing pipeline P, and serves as a spacer. Male threads are formed on both ends of the connecting bolt 12a. The nuts 12b are screwed onto the male threads of the connecting bolt 12a.

[0016] The connecting bolt 12a is inserted into the pipe 12c located between two adjacent ring-shaped reinforcing members 11, and nuts 12b are threaded onto the male threads at both ends of the bolt. The connecting member 12 connects and integrates the two adjacent ring-shaped reinforcing members 11. Even if the existing pipeline P has bends or unevenness, these can be accommodated by adjusting the length of the pipe 12c and the connecting bolt 12a circumferentially. Alternatively, instead of the pipe 12c, connecting bolts 12a with nuts 12b pre-threaded slightly to the center at both ends may be used as spacers, and the ring-shaped reinforcing member 11 may be sandwiched between the nuts 12b to connect and integrate the ring-shaped reinforcing member 11. In the gap (backfilling space S) between the ring-shaped reinforcing member 11 and the existing pipeline P, an unhardened self-hardening filler 99 is injected during the final construction stage, as described below.

[0017] (Fitting member) 2 and 3, a plurality of fitting members 4 are attached parallel to one another along the longitudinal direction of the existing pipeline P on the inner periphery side of the pipeline reinforcement member 1. As shown in Fig. 3, the fitting members 4 are molded bodies with a uniform cross-sectional shape that is an angular C-shape that is almost the same as the fitting portion 11a of the above-mentioned ring-shaped reinforcing member 11. The length of the fitting members 4 in the longitudinal direction is a fixed length, for example, about 5 m.

[0018] The fitting members 4 are attached to the pipeline reinforcement member 1 by fitting the fitting members 4 into each fitting portion 11a of the ring-shaped reinforcement members 11, which are provided in multiple locations along the longitudinal direction of the existing pipeline P, so that the openings of the fitting members 4 face the center of the existing pipeline P (i.e., the radially inward direction of the existing pipeline P). The fitting members 4, each having a certain length, are connected together in multiple locations along the longitudinal direction of the existing pipeline P to cover the repair length. Specifically, the multiple fitting members 4 are connected by connecting members (not shown) with adjacent end faces in the longitudinal direction abutting against each other, resulting in a total length corresponding to the repair length of the existing pipeline P, and the entirety of the fitting members 4 is attached to the pipeline reinforcement member 1.

[0019] The material of the fitting member 4 is preferably an olefin-based thermoplastic resin such as polyethylene resin, which has excellent corrosion resistance, is lightweight, easy to install, and is inexpensive, but it can also be a thermosetting resin such as unsaturated polyester resin, a stronger fiber-reinforced plastic, a flame-retardant thermoplastic resin, or a metal such as stainless steel.

[0020] (Inner surface material) As shown in Figures 2 and 3, the inner surface member 2 is attached to the pipeline reinforcement material 1 on the inner side of the pipeline reinforcement material 1 via a plurality of fitting members 4 attached in the longitudinal and circumferential directions of the existing pipeline P.

[0021] The inner surface member 2 has a fixed length, for example, a length of about 5 m, along the longitudinal direction of the existing pipeline P. Furthermore, a plurality of the inner surface members 2 having a fixed length are connected in the longitudinal direction of the existing pipeline P to cover the repair length. That is, a plurality of the inner surface members 2 are connected by the inner surface member connecting member 3 with adjacent end faces in the longitudinal direction abutting each other, so that the total length corresponds to the repair length of the existing pipeline P, and the entirety is attached to the pipeline reinforcement member 1 via the fitting member 4.

[0022] Fig. 5 is a front view of the inner surface member 2 shown in Fig. 1. As shown in Figs. 3 and 5, the inner surface member 2 has a symmetrical uniform cross-sectional shape. As shown in Fig. 5, the inner surface member 2 has a side wall portion 22 and a concave insertion portion 21. The side wall portion 22 covers the inner surface of the existing pipeline P along the longitudinal direction of the existing pipeline P. The side wall portion 22 is formed so as to incline in an arch shape toward the inner surface of the existing pipeline P (upper side in the figure) from both ends in the circumferential direction of the existing pipeline P toward the center, and has an end face 22a in the longitudinal direction of the existing pipeline P.

[0023] The concave insertion portions 21 are provided at both ends of the side wall portion 22 in the circumferential direction of the existing pipeline P. The two concave insertion portions 21 each protrude toward the inner surface (radially outward) (upper side in the figure) of the existing pipeline P. The concave insertion portions 21 are formed continuously along the longitudinal direction of the inner surface member 2.

[0024] 5, the concave insertion portion 21 has a protruding portion 21a, an inclined portion 21b, and an end face 21c in the longitudinal direction of the existing pipeline P. The protruding portion 21a protrudes from the circumferential end of the side wall portion 22 to one side (toward the inner surface of the existing pipeline P) in the thickness direction of the side wall portion 22 (in the radial direction of the existing pipeline P). The inclined portion 21b extends at an incline from the tip of the protruding portion 21a so as to approach the side wall portion 22. The portion surrounded by the protruding portion 21a, the inclined portion 21b, and the side wall portion 22 constitutes a concave portion 23.

[0025] The recessed inner dimension H2 of the recessed inserted portion 21 is formed to be uniform in size along the longitudinal direction of the inner surface member 2. As will be described in detail later, the insertion portion 33 of the inner surface member connecting member 3 is inserted into the recessed inserted portion 21.

[0026] 3, when the inner surface members 2 are inserted into the opening of the fitting member 4 with the concave inserted portions 21 of the two inner surface members 2 (edge ​​portions along the longitudinal direction of the inner surface members 2, i.e., one end portion of one inner surface member 2 in the circumferential direction of the existing pipeline P and the other end portion of the other inner surface member 2 adjacent to the one inner surface member 2 in the circumferential direction of the existing pipeline P) paired together, the tips of the inclined portions 21b of the concave inserted portions 21 are locked into the opening of the fitting member 4. In this way, the inner surface members 2 are securely held in the pipeline reinforcement 1 via the fitting member 4.

[0027] The material of this inner surface member 2 is preferably an olefin-based thermoplastic resin such as polyethylene resin, which is highly corrosion-resistant, lightweight, easy to install, and inexpensive, as is the case with the above-mentioned fitting member 4, but it can also be a thermosetting resin such as unsaturated polyester resin, a stronger fiber-reinforced plastic, a flame-retardant thermoplastic resin, or a metal such as stainless steel.

[0028] In addition, when selecting the material of the inner surface member 2 and determining the thickness of the inner surface member 2, it is preferable to make the concave inserted portion 21 elastically deformable so that when the insertion portion 33 of the inner surface member connecting material 3 is inserted into the concave inserted portion 21, the concave inserted portion 21 is pushed out, i.e., the inner recess dimension H2 is increased, and when the insertion portion 33 is pulled out of the concave inserted portion 21, the inner recess dimension H2 of the concave inserted portion 21 returns to its original size.

[0029] (sealing material) As shown in Fig. 3, a sealing material 5 made of, for example, a thermoplastic elastomer, synthetic rubber, water-swelling rubber, or the like is disposed between each fitting member 4 and the mutually abutting recessed inserted portions 21 of the two inner surface members 2 attached to each fitting member 4. This makes it possible to obtain watertightness between the inner surface members 2 adjacent in the circumferential direction of the existing pipeline P.

[0030] (Internal member connecting material) Fig. 6 is a perspective view of the inner surface member connecting material 3 shown in Fig. 1. As shown in Fig. 6, the inner surface member connecting material 3 is a plate-like member with a certain length and a symmetrical shape, and its cross section in the direction perpendicular to the longitudinal direction is U-shaped. The inner surface member connecting material 3 connects the inner surface members 2 together in the longitudinal direction of the existing pipeline P.

[0031] The inner surface member connecting member 3 has a main body portion 31 having a wall portion 32 and an insertion portion 33, and a connecting portion 34. The wall portion 32 faces the side wall portion 22 of the inner surface member 2 when the inner surface members 2 are connected to each other.

[0032] The insertion portions 33 are provided at both ends of the wall surface portion 32 in the circumferential direction of the existing pipeline P. The two insertion portions 33 each protrude to the outside of the inner surface of the existing pipeline P (upper side in the figure). The insertion portions 33 are formed continuously along the longitudinal direction of the inner surface member connecting material 3. The insertion portions 33 are inserted into the concave insertion portions 21 of the inner surface member 2.

[0033] Fig. 7 is a perspective view of the inner surface member connecting material 3, excluding the connection portion 34. As indicated by arrows X in Fig. 7, the insertion portion 33 is formed so that the height of the convex portion increases from both longitudinal ends toward the longitudinal center C. The insertion portion 33 has a maximum convex height H1 at the longitudinal center C (excluding recesses 33a, which will be described later).

[0034] Fig. 8 is an enlarged view of a longitudinal center C of the insertion portion 33 in Fig. 7. As shown in Fig. 8, the insertion portion 33 is formed so that the protrusion height H1 at the longitudinal center C continues for a predetermined length L at a constant height H1 along the longitudinal direction. A recess 33a is formed in the longitudinal center C of the insertion portion 33. A claw portion 34c of a base portion 34a of the connection portion 34, which will be described later, fits into this recess 33a.

[0035] Here, for the main body 31, a processed product made of a metal material such as stainless steel, a molded product made of a thermoplastic resin, a molded product made of a thermosetting resin (including FRP), or the like is used.

[0036] The connecting portion 34 is sandwiched between the two inner surface members 2 when the inner surface members 2 are connected to each other. FIG. 9 is a perspective view of the connecting portion 34 shown in FIG. 6. As shown in FIG. 9, the connecting portion 34 has a base portion 34a and an abutting portion 34b. The base portion 34a has a U-shaped cross section in a direction perpendicular to the longitudinal direction, and has claw portions 34c on both ends. The claw portions 34c engage with the recesses 33a of the insertion portion 33, thereby fitting the connecting portion 34 into the main body portion 31.

[0037] The contact portions 34b are made of an elastic body and are provided on both sides of the base portion 34a in the longitudinal direction of the inner member connecting material 3. The contact portions 34b have a first end face 34e facing the end face 22a of the side wall portion 22 in the longitudinal direction of the inner member 2, and a second end face 34f facing the end face 21c of the concave inserted portion 21 in the longitudinal direction of the inner member 2.

[0038] The base 34a has stopper portions 34d at both ends thereof. The stopper portions 34d are provided on both sides of the claw portions 34c in the longitudinal direction of the inner surface member connecting material 3. In the longitudinal direction of the inner surface member connecting material 3, the surface of the stopper portions 34d is located more inward of the connecting portion 34 than the surface of the abutting portion 34b. A part of the end surface 21c of the concave inserted portion 21 in the longitudinal direction of the inner surface member 2, near the tip of the inclined portion 21b, abuts against the stopper portions 34d.

[0039] Here, a molded product of thermoplastic resin or a molded product of thermosetting resin (including FRP) is used for the base 34a of the connecting portion 34. A thermoplastic elastomer or rubber that is more flexible than the base 34a is used for the abutting portion 34b of the connecting portion 34. The stopper portion 34d is preferably made of a harder material than the abutting portion 34b, and is desirably made of the same material as the base 34a, for example.

[0040] 10 is a perspective view showing a state in which the inner member connecting member 3 is being inserted into the inner member 2. To connect two inner member members 2 in the longitudinal direction using the inner member connecting member 3, first, as shown in Fig. 10, the inserting portion 33 of the inner member connecting member 3 is inserted approximately halfway into the recessed inserted portion 21 at the end of one of the inner members 2, so that the end face 22a of the side wall portion 22 in the longitudinal direction of the inner member 2 abuts against the first end face 34e of the abutting portion 34b of the connecting portion 34, and the end face 21c of the recessed inserted portion 21 in the longitudinal direction of the inner member 2 abuts against the second end face 34f of the abutting portion 34b of the connecting portion 34. As a result, the one of the inner members 2 and the inner member connecting member 3 are fitted together (tightly fitted), and approximately the remaining half of the inserting portion 33 of the inner member connecting member 3 protrudes.

[0041] Next, the concave inserted portion 21 at the end of the other inner surface member 2 is inserted into the remaining portion of the insertion portion 33, and the end face 22a of the side wall portion 22 in the longitudinal direction of the inner surface member 2 is brought into contact with the first end face 34e of the abutting portion 34b of the connecting portion 34, and the end face 21c of the concave inserted portion 21 in the longitudinal direction of the inner surface member 2 is brought into contact with the second end face 34f of the abutting portion 34b of the connecting portion 34. This causes the other inner surface member 2 and the inner surface member connecting member 3 to fit together (fit tightly).

[0042] When the connecting portion 34 is sandwiched between the two inner surface members 2, the abutting portion 34b elastically deforms and is compressed. This fills the minute gap between the connecting portion 34 and the inner surface member 2. When the tip of the inclined portion 21b of the end surface 21c of the concave insertion portion 21 abuts against the stopper portion 34d of the connecting portion 34, the inner surface member 2 is held in position relative to the connecting portion 34, and the amount of compression of the abutting portion 34b becomes constant at a predetermined amount. In this embodiment, the thickness of the abutting portion 34b is 1.4 mm, the thickness of the stopper portion 34d is 0.6 mm, and the predetermined amount of compression of the abutting portion 34b is 0.1 to 0.8 mm.

[0043] The results of the watertightness test of the abutment portion 34b are shown in Table 1. This test was conducted to determine the thickness of the stopper portion 34d of the connection portion 34 and was performed without the stopper portion 34d. The inner members 2 were connected to each other with the inner member connecting member 3, and the end faces 22a of the side walls 22 of the inner members 2 in the longitudinal direction were abutted against the first end faces 34e of the abutment portions 34b, and the end faces 21c of the recessed insertion portions 21 in the longitudinal direction of the inner members 2 were abutted against the second end faces 34f of the abutment portions 34b. The amount of compression of the abutment portions 34b was varied to evaluate whether water leakage occurred from the gap between the inner members 2 and the connection portion 34 under a water pressure of 0.1 MPa within three minutes. The evaluation results showed that when the amount of compression of the abutment portions 34b was greater than a predetermined amount, the abutment portions 34b protruded from between the end faces 21c and 22a of the inner members 2 and the base portion 34a.

[0044] [Table 1]

[0045] When the inner members 2 are connected to each other, the abutting portion 34b elastically deforms, filling the minute gap between the connecting portion 34 and the inner member 2. This ensures watertightness at the connection portion between the inner members 2. Furthermore, because there is no need to seal the gap with a resin sealant or the like, it is possible to improve the workability when connecting the inner members 2 adjacent in the longitudinal direction, and also reduce the time required for the work.

[0046] Furthermore, when a portion of the end surface 21c of the concave insertion portion 21 abuts against the stopper portion 34d, the amount of compression of the abutting portion 34b reaches a predetermined amount. If the amount of compression of the abutting portion 34b is smaller than the predetermined amount when the inner members 2 are connected to each other, water may seep into the gap between the connecting portion 34 and the inner member 2. If the amount of compression of the abutting portion 34b is larger than the predetermined amount when the inner members 2 are connected to each other, the abutting portion 34b may protrude from between the end surface 21c and the end surface 22a of the inner member 2 and the base 34a. Therefore, by providing the stopper portion 34d on the base 34a of the connecting portion 34 and setting the amount of compression of the abutting portion 34b to a predetermined amount when the inner members 2 are connected to each other, watertightness can be suitably ensured.

[0047] Here, the recessed inner dimension H2 (see Figure 5) of the recessed insertion portion 21 is slightly larger than the height of the convex portion at both longitudinal ends of the inner surface member connecting material 3, and slightly smaller than the height H1 of the convex portion at the longitudinal center C (see Figure 7).

[0048] FIG. 11 is a front view of the inner member 2, showing the state in which the inner member connecting member 3 is fitted to the inner member 2. As shown in FIG. 11, when two inner members 2 are connected in the longitudinal direction, the insertion portion 33 of the inner member connecting member 3 pushes open the recessed inserted portion 21 of the inner member 2. This increases the frictional force at the contact portion Y between the longitudinal center portion C, where the protruding portion height of the insertion portion 33 is greatest, and the inside of the recessed inserted portion 21. Furthermore, as the inner member connecting member 3 is inserted into the inner member 2, the arched center portion of the side wall portion 22 of the inner member 2 is pressed against the wall surface portion 32 of the inner member connecting member 3. This increases the frictional force at the contact portion Z between the wall surface portion 32 of the inner member connecting member 3 and the side wall portion 22 of the inner member 2. As a result, the inner members 2 and the inner member connecting member 3 are strongly connected to each other.

[0049] The recessed inner dimension H2 of the recessed inserted portion 21 and the convex portion height H1 of the inserting portion 33 are determined so that the recessed inserted portion 21 of the inner surface member 2 and the inserting portion 33 of the inner surface member connecting member 3 fit closely together when each of the longitudinal end faces of the two inner surface members 2 abuts against the abutting portion 34b of the connecting portion 34. In other words, the recessed inner dimension H2 of the recessed inserted portion 21 and the convex portion height H1 of the inserting portion 33 are determined in consideration of the materials and thicknesses of the inner surface members 2 and the inner surface member connecting member 3, the degree of elastic deformation of the recessed inserted portion 21 of the inner surface member 2, and the like.

[0050] (Laying method of lining structure) Next, a method for laying the lining structure 100 inside an existing pipeline P will be described. Fig. 12 is a cross-sectional view of the existing pipeline P showing the state before the inner surface member 2 is disposed along the inner surface of the existing pipeline P. Fig. 13 is a cross-sectional view of the existing pipeline P showing the state after lining of the existing pipeline P is completed.

[0051] First, during construction, a weir, for example, is installed upstream of the existing pipeline P. Alternatively, a bypass is placed and water is changed, or other methods are used to create an environment in the existing pipeline P where people can work. Then, the pipeline reinforcement material 1 is arranged along the inner surface of the existing pipeline P. The ring-shaped reinforcing member 11 that constitutes the pipeline reinforcement material 1 is usually formed by assembling multiple divided arc-shaped members inside the existing pipeline P. Then, multiple ring-shaped reinforcing members 11, with some or all of the members assembled, are joined in the longitudinal direction of the existing pipeline P with connecting members 12 to obtain the cylindrical pipeline reinforcement material 1.

[0052] After the assembly of the pipeline reinforcement member 1 is completed, the fitting members 4 are fitted into the fitting portions 11a of the ring-shaped reinforcing members 11 that constitute the pipeline reinforcement member 1. The state in which the fitting members 4 are fitted into the ring-shaped reinforcing members 11 is shown in a cross-sectional view in FIG. 12. Next, the inner surface member 2 is fitted into the fitting members 4 in pairs. The inner surface members 2 are connected using the inner surface member connecting members 3 by the method described above to form a continuous body in their longitudinal direction. The state in which the inner surface member 2 is fitted into the fitting members 4 is shown in cross-sectional views in FIGS. 1 and 2. Note that in this embodiment, it is not necessarily necessary to use the fitting members 4, and the inner surface member 2 may be attached directly to the ring-shaped reinforcing members 11 that constitute the pipeline reinforcement member 1 by fitting.

[0053] Then, with the inner surface member 2 shown in FIGS. 1 and 2 attached to the pipeline reinforcement member 1, a self-hardening filler 99 is injected between the inner surface member 2 and the existing pipeline P and allowed to harden between them. The final structure after the self-hardening filler 99 has been injected is shown in a cross-sectional view in FIG. 13. The self-hardening filler 99 can be, for example, a cement-based material such as cement milk, mortar, or concrete, or a thermosetting resin such as unsaturated polyester resin or epoxy resin, and is selected appropriately depending on the required performance and cost. When injecting the self-hardening filler 99, a gable form or the like can be installed at the end of the existing pipeline P, or an injection port can be provided in the inner surface member 2.

[0054] (Variation) It should be noted that the inner member connecting material 3 is not limited to that shown in Fig. 6. Fig. 14 is a perspective view of an inner member connecting material 103 in a modified example. This inner member connecting material 103 has a main body portion 131 and a connecting portion 34. The connecting portion 34 of the inner member connecting material 103 is the same as the connecting portion 34 of the inner member connecting material 3 described above. The main body portion 131 of the inner member connecting material 103 is formed from the same material as the main body portion 31 of the inner member connecting material 3 described above.

[0055] The main body 131 has a wall surface 132, a side surface 133, and an inclined portion 134. The wall surface 132 faces the side wall 22 of the inner surface member 2 when the inner surface members 2 are connected to each other. Both ends 132a of the wall surface 132 in the longitudinal direction of the inner surface member connecting material 3 are curved concavely toward the center of the wall surface 132 in the longitudinal direction.

[0056] An adhesive 140 is applied to the wall surface portion 132 to bond the side wall portion 22 of the inner surface member 2 to the wall surface portion 132. The adhesive 140 is applied to each of approximately both ends (predetermined positions) of the wall surface portion 132 in the longitudinal direction.

[0057] The side surface portions 133 are provided at both ends of the wall surface portion 132 in the circumferential direction of the existing pipeline P. The two side surface portions 133 each protrude toward the inner surface side (lower side in the figure) of the existing pipeline P. The side surface portions 133 are formed continuously along the longitudinal direction of the inner surface member connecting material 3. A recess is formed in the center of the side surface portion 133, into which the claw portion 34c of the base portion 34a of the connecting portion 34 fits.

[0058] The inclined portions 134 are provided so as to protrude longitudinally from both sides of the side surface portion 133 in the longitudinal direction of the inner surface member connecting material 103. The inclined portions 134 are inclined toward the inner surface side (lower side in the figure) of the existing pipeline P toward the longitudinal end. The inclination angle is, for example, 15°, but is not limited to this.

[0059] When the inner surface members 2 are connected to each other, the inclined portion 134 and the side surface portion 133 are inserted into the recessed inserted portion 21 in this order, and become the insertion portion of the inner surface member connecting member 103 of the modified example.

[0060] Here, the inner surface member 2 is long in the longitudinal direction (about 5 m). As shown in Figure 10, in order to insert one inner surface member 2 into the inner surface member connecting member 3 that has been inserted into the other inner surface member 2 and is oriented obliquely with respect to the inner surface of the existing pipeline P, the end of the other inner surface member 2 must be lifted up and made parallel to the inner surface member connecting member 3. Because the inner surface member 2 is long, in order to make the end of the inner surface member 2 parallel to the inner surface member connecting member 3, it is necessary to lift up a long range of the end of the inner surface member 2, which is a burden for the worker.

[0061] In contrast, to connect two inner surface members 2 in the longitudinal direction using the modified inner surface member connecting member 103, first, an end portion of one of the inner surface members 2 is lifted, one of the inclined portions 134 of the inner surface member connecting member 103 is inserted into the recessed insertion portion 21 of this end portion, and then the side surface portion 133 of the inner surface member connecting member 103 is inserted up to approximately half its length so that the side surface portion 133 and the recessed insertion portion 21 are tightly fitted together. At this time, the inclined portion 134 is inserted parallel to the longitudinal direction of the recessed insertion portion 21, and then the side surface portion 133 is inserted parallel to the longitudinal direction of the recessed insertion portion 21. Because the inclined portion 134 is inclined with respect to the side surface portion 133, the insertion angle of the inner surface member connecting member 103 with respect to the inner surface member 2 differs when inserting the inclined portion 134 into the recessed insertion portion 21 and when inserting the side surface portion 133 into the recessed insertion portion 21.

[0062] When the inner surface member connecting material 103 is inserted into one of the inner surface members 2, the end face 22a of the side wall portion 22 in the longitudinal direction of the inner surface member 2 abuts against the first end face 34e of the abutting portion 34b of the connecting portion 34, and the end face 21c of the concave inserted portion 21 in the longitudinal direction of the inner surface member 2 abuts against the second end face 34f of the abutting portion 34b of the connecting portion 34.

[0063] Next, the end of the other inner surface member 2 is lifted, and the concave insertion portion 21 of this end is inserted into the exposed other inclined portion 134, and then inserted into approximately the remaining half of the side surface portion 133, so that the side surface portion 133 and the concave insertion portion 21 fit tightly together. At this time, the concave insertion portion 21 is inserted along the inclination of the inclined portion 134, and then the concave insertion portion 21 is inserted parallel to the longitudinal direction of the side surface portion 133. Because the inclined portion 134 is inclined with respect to the side surface portion 133, the insertion angle of the inner surface member 2 with respect to the inner surface member connecting material 103 differs when the concave insertion portion 21 is inserted into the inclined portion 134 and when the concave insertion portion 21 is inserted into the side surface portion 133.

[0064] When the other inner surface member 2 is inserted into the inner surface member connecting material 103, the end face 22a of the side wall portion 22 in the longitudinal direction of the inner surface member 2 abuts against the first end face 34e of the abutting portion 34b of the connecting portion 34, and the end face 21c of the concave inserted portion 21 in the longitudinal direction of the inner surface member 2 abuts against the second end face 34f of the abutting portion 34b of the connecting portion 34.

[0065] In this way, when inserting the concave insertion portion 21 into the inclined portion 134, the concave insertion portion 21 can be inserted along the inclination of the inclined portion 134. As a result, when inserting one of the inner surface members 2 into the inner surface member connecting member 103 that has been inserted into one of the inner surface members 2 and is angled relative to the inner surface of the existing pipeline P, the other inner surface member 2 can be easily inserted into the inclined portion 134 by simply lifting the end of the inner surface member 2 slightly, without having to significantly lift the end of the inner surface member 2 to make it parallel to the wall surface portion 132 and the side surface portion 133. As a result, the range over which the end of the inner surface member 2 needs to be lifted is shorter than when the end of the inner surface member 2 is made parallel to the wall surface portion 132 and the side surface portion 133, thereby reducing the burden on the worker. This facilitates the task of connecting longitudinally adjacent inner surface members 2 and also reduces the time required for the task.

[0066] Furthermore, both ends 132a of the wall surface portion 132 in the longitudinal direction of the inner surface member connecting member 103 are curved concavely toward the center of the wall surface portion 132 in the longitudinal direction. This prevents the ends of the wall surface portion 132 from interfering with the end surfaces 22a of the side wall portions 22 of the inner surface member 2 when inserting the concave insertion portion 21 into the inclined portion 134. This allows the concave insertion portion 21 to be smoothly inserted into the inclined portion 134.

[0067] Furthermore, the insertion angle of the inner surface member 2 relative to the inner surface member connecting material 103 differs when the concave insertion portion 21 is inserted into the inclined portion 134 and when the concave insertion portion 21 is inserted into the side surface portion 133. Therefore, a series of movements of inserting the inner surface member 2 while changing the insertion angle causes the side wall portion 22 to come into contact with the wall surface portion 132 while covering it. Therefore, the predetermined amount of adhesive 140 applied to the wall surface portion 132 remains between the inner surface member 2 and the inner surface member connecting material 103 at a recessed position in the side wall portion 22 without being excessively spread by the surface of the side wall portion 22 of the inner surface member 2 facing the wall surface portion 132 or scraped off by contacting the end of the side wall portion 22. In this way, simply inserting the other inner surface member 2 into the inner surface member connecting material 103 allows the adhesive 140 to remain in the predetermined position without being pushed out from the position where it was initially applied, thereby reliably bonding the inner surface member 2 and the inner surface member connecting material 103. The same applies when inserting the inner surface member connecting member 103 into one of the inner surface members 2. In this manner, the inner surface members 2 are reliably connected to each other in the longitudinal direction of the existing pipeline P by the inner surface member connecting member 103.

[0068] (effect) As described above, with the inner surface member connecting member 3 and lining structure 100 according to this embodiment, the first end face 34e of the abutting portion 34b made of an elastic body abuts against the end face 22a of the side wall portion 22 in the longitudinal direction, and the second end face 34f of the abutting portion 34b abuts against the end face 21c of the concave insertion portion 21 in the longitudinal direction. When the inner surface members 2 are connected to each other, the abutting portion 34b elastically deforms, thereby filling minute gaps between the connecting portion 34 and the inner surface member 2. This ensures watertightness at the connection portion between the inner surface members 2. Furthermore, because there is no need to seal gaps with a resin sealant or the like, the workability when connecting longitudinally adjacent inner surface members 2 can be improved and the time required for the work can be reduced.

[0069] Furthermore, when a portion of the end surface 21c of the concave insertion portion 21 abuts against the stopper portion 34d, the amount of compression of the abutting portion 34b reaches a predetermined amount. If the amount of compression of the abutting portion 34b is smaller than the predetermined amount when the inner members 2 are connected to each other, water may seep into the gap between the connecting portion 34 and the inner member 2. If the amount of compression of the abutting portion 34b is larger than the predetermined amount when the inner members 2 are connected to each other, the abutting portion 34b may protrude from between the end surface 21c and the end surface 22a of the inner member 2 and the base 34a. Therefore, by providing the stopper portion 34d on the base 34a of the connecting portion 34 and setting the amount of compression of the abutting portion 34b to a predetermined amount when the inner members 2 are connected to each other, watertightness can be suitably ensured.

[0070] Although the embodiments of the present invention have been described above, they are merely illustrative examples and do not limit the present invention, and the specific configurations and other aspects can be appropriately modified in design. Furthermore, the actions and effects described in the embodiments of the invention are merely a list of the most preferred actions and effects resulting from the present invention, and the actions and effects of the present invention are not limited to those described in the embodiments of the present invention. [Explanation of symbols]

[0071] 1 Pipe reinforcement material 2. Inner surface components 3 Internal member connecting material 4 Fitting member 5 Sealing material 11 Ring-shaped reinforcing member 11a Mating part 12 Connecting member 12a Connecting bolt 12b Nut 12c pipe material 21 Concave insertion portion 21a Projection 21b Slope 21c End face of concave insertion portion 22 Side wall 22a End face of side wall 23 Recess 31 Main body 32 Wall section 33 Insertion section 33a Recess 34 Connection 34a base 34b Contact part 34c Claw part 34d Stopper part 34e 1st end face 34f 2nd end face 99 Self-curing filler 100 Lining structure 103 Internal member connecting material 131 Main body 132 Wall 133 Side part 134 Slope 140 Adhesive

Claims

1. An inner surface member connecting member that connects inner surface members attached to the inner periphery of a pipeline reinforcement member disposed along the inner surface of the pipeline in the longitudinal direction of the pipeline, The inner surface member is a sidewall portion covering the inner surface of the pipe along the longitudinal direction; a recessed insertion portion provided at each end of the side wall portion in the circumferential direction of the pipeline, protruding toward the inner surface of the pipeline, and continuously formed along the longitudinal direction; and a wall surface portion that faces the side wall portion when the inner surface members are connected to each other; an insertion portion provided at each end of the wall portion in the circumferential direction, protruding toward the inner surface, and inserted into the recessed insertion portion; a connecting portion that is sandwiched between the two inner surface members when the inner surface members are connected to each other; and The connection portion is A base and abutment portions each made of an elastic body, the abutment portions being provided on both sides of the base portion in the longitudinal direction, the abutment portions having a first end surface facing an end surface of the side wall portion in the longitudinal direction and a second end surface facing an end surface of the recessed insertion portion in the longitudinal direction; and The inner surface member connecting material is characterized in that the base portion is separate from the abutment portion and is made of a material that is harder than the abutment portion.

2. the base portion has a stopper portion against which an end surface of the recessed insertion portion in the longitudinal direction abuts, 2. The inner surface member connecting material according to claim 1, wherein when the end face of the recessed inserted portion abuts against the stopper portion, the abutting portion is compressed by a predetermined amount.

3. The inner surface member connecting material according to claim 1 or 2; The inner surface member; and When the insertion portion is inserted into the concave receiving portion and the inner surface member and the inner surface member connecting material are tightly fitted together, the end face of the side wall portion in the longitudinal direction abuts against the first end face, and the end face of the concave receiving portion abuts against the second end face.

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