Inner surface member connecting material, pipeline lining structure equipped with same, and pipeline lining method

Abstract

To provide an inner surface member coupling material which can facilitate work for coupling inner surface members located adjacent to each other in a longitudinal direction, and to provide a lining structure of a duct line including the inner surface member coupling material and a lining method of the duct line.SOLUTION: An inner surface member coupling material includes: a wall surface part 31 facing side wall parts of inner surface members when the inner surface members are coupled; side surface parts 32 which are respectively provided at both end parts of the wall surface part 31 as seen in a circumferential direction of a duct line and protrude to the inner surface side of the duct line and each of which is continuously formed along a longitudinal direction of the duct line and inserted into a recessed inserted part of the inner surface member; and inclined parts 33 which are provided protruding in the longitudinal direction from both sides of the side surface part 32 as seen in the longitudinal direction. The inclined part 33 inclines to the inner surface side of the duct line toward a longitudinal end.SELECTED DRAWING: Figure 6

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, a lining structure of a pipeline including the same, and a lining method of a pipeline. [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, a pipeline lining structure suitable for covering the inner surface of a large-diameter pipeline that allows personnel to enter and work inside is known (see, for example, Patent Document 1). The pipeline lining structure described in Patent Document 1 is configured by attaching a plurality of longitudinally extending inner surface members to the inner periphery of a hollow framework-like pipeline reinforcement member that is arranged along the inner surface of the existing pipeline. Longitudinally adjacent inner surface members are connected by an inner surface member connector that is arranged across both inner surface members. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-014092 Summary of the Invention [Problem to be solved by the invention]

[0004] The work of connecting longitudinally adjacent inner surface members is carried out inside the pipeline. The procedure is as follows: First, lift up the end of one of the inner surface members and insert about half of the inner surface member connecting member into this end. At this time, the inner surface member connecting member is at an angle to the inner surface of the pipeline. Next, insert the other inner surface member into the remaining half of the inner surface member connecting member.

[0005] However, the inner member connecting member in Patent Document 1 is inserted into the inner member parallel to the longitudinal direction of the inner member. The inner member is long in the longitudinal direction (approximately 5 m). In order to insert one inner member into the inner member connecting member that has been inserted into the other inner member and is oriented obliquely relative to the inner surface of the pipeline, the end of the other inner member must be lifted to make it parallel to the inner member connecting member. Because the inner member is long, making the end of the inner member parallel to the inner member connecting member requires lifting a long range of the end of the inner member, which is a burden for the worker.

[0006] The object of the present invention is to provide an inner surface member connecting material that can facilitate the work of connecting adjacent inner surface members in the longitudinal direction, a pipeline lining structure equipped with the same, and a pipeline lining method. [Means for solving the problem]

[0007] The present invention provides an inner surface member connecting material that connects, in the longitudinal direction of a pipeline, inner surface members that are attached to the inner periphery of a pipeline reinforcement material that is arranged along the inner surface of the pipeline, the inner surface members having side wall portions that cover the inner surface of the pipeline along the longitudinal direction, and concave 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 formed continuously along the longitudinal direction, and has wall surface portions that face the side wall portions when the inner surface members are connected to each other, side surface portions that are provided at both ends of the wall surface portion in the circumferential direction, each protruding toward the inner surface of the pipeline and formed continuously along the longitudinal direction, and are inserted into the concave inserted portion, and inclined portions that protrude in the longitudinal direction from both sides of the side surface portion, and the inclined portions are inclined toward the inner surface of the pipeline toward the ends in the longitudinal direction. [Effects of the Invention]

[0008] According to the present invention, the inclined portion of the inner member connecting member is inclined toward the inner surface of the pipeline toward the longitudinal end of the pipeline. Therefore, when inserting the concave receptacle portion of the inner member into the inclined portion, the concave receptacle portion can be inserted along the inclination of the inclined portion. As a result, when inserting an inner member into an inner member connecting member that is inserted into one inner member and angled relative to the inner surface of the pipeline, the end of the inner member can be made parallel to the inclined portion by simply lifting it slightly, without having to significantly lift the end of the inner member to make it parallel to the wall surface and side surface. As a result, the range of lifting the end of the inner member is shorter than when the end of the inner member is parallel to the wall surface and side surface, reducing the burden on the worker. This facilitates the process of connecting adjacent inner members in the longitudinal direction and reduces the time required for the process.

[0009] Furthermore, because the insertion angle of the inner member relative to the inner member connecting member differs when inserting the concave insertable portion into the inclined portion and when inserting the concave insertable portion into the side portion, the series of movements of inserting the inner member while changing the insertion angle causes the side wall portion to contact the wall surface portion while overlapping the wall surface portion. Therefore, the predetermined amount of adhesive applied to the wall surface portion remains between the inner member and the inner member connecting member at a recessed position in the side wall portion without being excessively spread by the surface of the inner member's side wall portion facing the wall surface portion or scraped off by contacting the edge of the side wall portion. In this way, simply inserting the inner member into the inner member connecting member allows the adhesive to remain in the predetermined position without being pushed out from the initial application position, thereby ensuring reliable bonding between the inner member and the inner member connecting member. This allows for more reliable connection of the inner members along the length of the pipeline. [Brief explanation of the drawings]

[0010] [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 showing a state in which an inner surface member is being inserted into an inner surface member connecting member. [Figure 8] 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 9] 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 10] FIG. 10 is a cross-sectional view of the existing pipeline showing the state after lining of the existing pipeline has been completed. DETAILED DESCRIPTION OF THE INVENTION

[0011] 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.

[0012] (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 state in which only the pipeline reinforcement material 1 is 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. 10). However, FIGS. 1 to 3 show the state before the self-hardening filler 99 is filled.

[0013] 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.

[0014] (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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] (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.

[0020] 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.

[0021] 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.

[0022] (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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 5, the recessed insertion portion 21 has a protruding portion 21a and an inclined portion 21b. The protruding portion 21a protrudes from a 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 recessed portion 23.

[0027] 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 inclined portion 33 and the side surface portion 32 of the inner surface member connecting material 3 are inserted into the recessed inserted portion 21.

[0028] 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.

[0029] The material of this inner surface member 2 is preferably an olefin-based thermoplastic resin such as polyethylene resin, which has excellent corrosion resistance, light weight, excellent workability, and low cost, similar to 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. Note that the material of the inner surface member 2 is preferably the same as the material of the fitting member 4.

[0030] 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 insertion portion 21 elastically deformable so that when the side portion 32 of the inner surface member connecting material 3 is inserted into the concave insertion portion 21, the concave insertion portion 21 is pushed outward, i.e., the inner recess dimension H2 increases, and when the side portion 32 is pulled out of the concave insertion portion 21, the inner recess dimension H2 of the concave insertion portion 21 returns to its original size.

[0031] (sealing material) 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.

[0032] (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 to each other in the longitudinal direction of the existing pipeline P.

[0033] The inner surface member connecting material 3 has a wall surface portion 31, a side surface portion 32, and an inclined portion 33. When the inner surface members 2 are connected to each other, the wall surface portion 31 faces the side wall portion 22 of the inner surface member 2. Both ends 31a of the wall surface portion 31 in the longitudinal direction of the inner surface member connecting material 3 are curved concavely toward the center of the wall surface portion 31 in the longitudinal direction.

[0034] An adhesive 40 is applied to the wall surface portion 31 to bond the side wall portion 22 of the inner surface member 2 to the wall surface portion 31. The adhesive 40 is applied to each of approximately both ends (predetermined positions) of the wall surface portion 31 in the longitudinal direction.

[0035] The side surface portions 32 are provided at both ends of the wall surface portion 31 in the circumferential direction of the existing pipeline P. The two side surface portions 32 each protrude toward the inner surface side (the lower side in the figure) of the existing pipeline P. The side surface portions 32 are formed continuously along the longitudinal direction of the inner surface member connecting material 3.

[0036] The side surface portion 32 has a maximum convex height H1 at its longitudinal center C. The side surface portion 32 is formed so that the convex height H1 at the longitudinal center C continues for a predetermined length L at a constant height H1 along the longitudinal direction.

[0037] The inclined portions 33 are provided so as to protrude longitudinally from both sides of the side surface portion 32 in the longitudinal direction of the inner surface member connecting material 3. The inclined portions 33 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.

[0038] In the radial direction of the existing pipeline P, the height from the end of the inclined portion 33 on the inner side (lower side in the figure) of the existing pipeline P to the surface of the wall portion 31 on the center side (upper side in the figure) of the existing pipeline P is H1, which is the same as the convex portion height H1 at the center C of the side portion 32.

[0039] When the inner surface members 2 are connected to each other, the inclined portion 33 and the side surface portion 32 are inserted into the recessed inserted portion 21 in this order.

[0040] Here, for the inner surface member connecting material 3, a processed product of a metal material such as stainless steel, a molded product of a thermoplastic resin, a molded product of a thermosetting resin (including FRP), or the like is used.

[0041] FIG. 7 is a perspective view showing the state in which an inner member 2 is being inserted into an inner member connecting member 3. To connect two inner members 2 longitudinally using an inner member connecting member 3, first, an end of one of the inner members 2 is lifted, and one of the inclined portions 33 of the inner member connecting member 3 is inserted into the recessed insertion portion 21 of this end. Furthermore, the side surface portion 32 of the inner member connecting member 3 is inserted up to approximately half its length, so that the side surface portion 32 and the recessed insertion portion 21 fit tightly together. At this time, the inclined portion 33 is inserted parallel to the longitudinal direction of the recessed insertion portion 21, and then the side surface portion 32 is inserted parallel to the longitudinal direction of the recessed insertion portion 21. Because the inclined portion 33 is inclined with respect to the side surface portion 32, the insertion angle of the inner member connecting member 3 relative to the inner member 2 differs when inserting the inclined portion 33 into the recessed insertion portion 21 and when inserting the side surface portion 32 into the recessed insertion portion 21.

[0042] When the inner surface member connecting member 3 is inserted into one of the inner surface members 2, as shown in Fig. 7, the end face of the end of the inner surface member 2 is positioned at the center C of the side surface portion 32, and the one of the inner surface members 2 and the inner surface member connecting member 3 are fitted together. At this time, the inner surface member connecting member 3 is held by the worker and is tilted relative to the inner surface of the existing pipeline P, so that approximately the remaining half of the side surface portion 32 and the other inclined portion 33 are exposed.

[0043] Next, as shown in Figure 7, 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 33, and then inserted into approximately the remaining half of the side surface portion 32, so that the side surface portion 32 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 33, and then the concave insertion portion 21 is inserted parallel to the longitudinal direction of the side surface portion 32. Because the inclined portion 33 is inclined with respect to the side surface portion 32, the insertion angle of the inner surface member 2 with respect to the inner surface member connecting material 3 differs when the concave insertion portion 21 is inserted into the inclined portion 33 and when the concave insertion portion 21 is inserted into the side surface portion 32.

[0044] When the other inner surface member 2 is inserted into the inner surface member connecting member 3, the other inner surface member 2 and the inner surface member connecting member 3 are fitted together. Then, the end faces of both inner surface members 2 are brought into contact with each other.

[0045] Here, when inserting the concave insertion portion 21 into the inclined portion 33, the concave insertion portion 21 can be inserted along the inclination of the inclined portion 33. As a result, when inserting one of the inner surface members 2 into the inner surface member connecting member 3 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 33 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 31 and the side surface portion 32. 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 31 and the side surface portion 32, 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.

[0046] In addition, both ends 31a of the wall surface portion 31 in the longitudinal direction of the inner surface member connecting member 3 are curved concavely toward the center of the wall surface portion 31 in the longitudinal direction. This prevents the ends of the wall surface portion 31 from interfering with the end surfaces of the side wall portions 22 of the inner surface member 2 when inserting the concave insertion portion 21 into the inclined portion 33. This allows the concave insertion portion 21 to be inserted smoothly into the inclined portion 33.

[0047] Furthermore, the insertion angle of the inner surface member 2 relative to the inner surface member connecting member 3 differs when inserting the concave insertion portion 21 into the inclined portion 33 and when inserting the concave insertion portion 21 into the side surface portion 32. Therefore, the 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 31 while covering it. Therefore, the predetermined amount of adhesive 40 applied to the wall surface portion 31 remains between the inner surface member 2 and the inner surface member connecting member 3 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 31 or scraped off by contacting the edge of the side wall portion 22. Thus, simply inserting the other inner surface member 2 into the inner surface member connecting member 3 allows the adhesive 40 to remain in place without being squeezed out from the initially applied position, thereby ensuring reliable bonding between the inner surface member 2 and the inner surface member connecting member 3. The same applies when inserting the inner surface member connecting member 3 into one inner surface member 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 3.

[0048] Here, the recessed inner dimension H2 of the recessed insertion portion 21 (see FIG. 5) is slightly smaller than the protruding portion height H1 (see FIG. 6) at the center C of the inner surface member connecting material 3 in the longitudinal direction.

[0049] FIG. 8 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. 8, when two inner members 2 are connected in the longitudinal direction, the side surface portions 32 of the inner member connecting member 3 push and spread the concave inserted portions 21 of the inner members 2. As a result, the frictional force increases at the contact portion Y between the longitudinal center portion C, where the convex portion height of the side surface portions 32 is greatest, and the inside of the concave 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 31 of the inner member connecting member 3. As a result, the frictional force increases at the contact portion Z between the wall surface portion 31 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.

[0050] The recessed inner dimension H2 of the recessed insertion portion 21 and the convex portion height H1 of the side surface portion 32 are determined so that the recessed insertion portion 21 of the inner surface member 2 and the convex portion height H1 of the side surface portion 32 fit tightly together when the longitudinal end faces of the two inner surface members 2 abut against each other. That is, the recessed inner dimension H2 of the recessed insertion portion 21 and the convex portion height H1 of the side surface portion 32 are determined taking into consideration 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 insertion portion 21 of the inner surface member 2, and the like.

[0051] (Laying method of lining structure) Next, a method for laying the lining structure 100 inside an existing pipeline P will be described. Fig. 9 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. 10 is a cross-sectional view of the existing pipeline P showing the state after lining of the existing pipeline P is completed.

[0052] First, during construction, a weir (not shown), for example, is installed upstream of the existing pipeline P. Alternatively, a bypass is placed to change the water, or another method is 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 connected in the longitudinal direction of the existing pipeline P with connecting members 12 to obtain the cylindrical pipeline reinforcement material 1.

[0053] 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. 9. 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.

[0054] Then, with the inner surface member 2 shown in Figures 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 Figure 10. 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 and the filler can be injected.

[0055] (effect) As described above, according to the inner surface member connecting member 3 and the lining structure 100 of this embodiment, the inclined portion 33 of the inner surface member connecting member 3 is inclined toward the inner surface of the existing pipeline P toward the longitudinal end of the existing pipeline P. Therefore, when inserting the concave insertion portion 21 of the inner surface member 2 into the inclined portion 33, the concave insertion portion 21 can be inserted along the inclination of the inclined portion 33. As a result, when inserting one inner surface member 2 into an inner surface member connecting member 3 that has been inserted into another inner surface member 2 and is angled relative to the inner surface of the existing pipeline P, the end of the inner surface member 2 can be made parallel to the inclined portion 33 simply by slightly lifting it, without having to significantly lift it to make it parallel to the wall surface portion 31 and the side surface portion 32. 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 31 and the side surface portion 32 of the inner surface member connecting member 3, thereby reducing the burden on the worker. This makes it possible to easily connect the inner surface members 2 adjacent to each other in the longitudinal direction, and also reduces the time required for this operation.

[0056] In addition, both ends 31a of the wall surface portion 31 in the longitudinal direction of the inner surface member connecting member 3 are curved concavely toward the center of the wall surface portion 31 in the longitudinal direction. This prevents the ends of the wall surface portion 31 from interfering with the end surfaces of the side wall portions 22 of the inner surface member 2 when inserting the concave insertion portion 21 into the inclined portion 33. This allows the concave insertion portion 21 to be inserted smoothly into the inclined portion 33.

[0057] Furthermore, the insertion angle of the inner surface member 2 relative to the inner surface member connecting member 3 differs when inserting the concave insertion portion 21 into the inclined portion 33 and when inserting the concave insertion portion 21 into the side surface portion 32. Therefore, the 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 31 while covering the wall surface portion 31. Therefore, the predetermined amount of adhesive 40 applied to the wall surface portion 31 remains between the inner surface member 2 and the inner surface connecting member 3 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 31 or scraped off by contacting the end of the side wall portion 22. Thus, simply inserting the inner surface member 2 into the inner surface member connecting member 3 allows the adhesive 40 to remain in the predetermined position without being pushed out from the initially applied position, thereby reliably bonding the inner surface member 2 and the inner surface member connecting member 3. This allows the inner surface members 2 to be more reliably connected to each other in the longitudinal direction of the existing pipeline P.

[0058] 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]

[0059] 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 22 Side wall 23 Recess 31 Wall section 32 Side part 33 Slope 40 Adhesive 99 Self-curing filler 100 Lining structure

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; side surfaces provided at both ends of the wall surface portion in the circumferential direction, protruding toward the inner surface, and continuously formed along the longitudinal direction, the side surfaces being inserted into the recessed insertion portion; inclined portions provided so as to protrude in the longitudinal direction from both sides of the side surface portion in the longitudinal direction; and An inner surface member connecting material characterized in that the end portion of the inclined portion on the inner surface side and the end portion opposite the inner surface side of the inclined portion each have a portion that inclines toward the inner surface side of the pipeline toward the longitudinal end, and the inclined portion is configured so that the concave inserted portion can be inserted into the concave inserted portion by moving the concave inserted portion along the inclined portion.

2. An inner surface member connecting member that connects inner surface members attached to the inner periphery of a pipeline reinforcement member arranged 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; side surfaces provided at both ends of the wall surface portion in the circumferential direction, protruding toward the inner surface, and continuously formed along the longitudinal direction, the side surfaces being inserted into the recessed insertion portion; inclined portions provided so as to protrude in the longitudinal direction from both sides of the side surface portion in the longitudinal direction; and the inclined portion is inclined toward the inner surface of the pipe toward the end in the longitudinal direction, An inner surface member connecting material, characterized in that both ends of the wall surface portion in the longitudinal direction are curved concavely toward the center of the wall surface portion in the longitudinal direction.

3. The inner surface member connecting material according to claim 1 or 2; The inner surface member; and A lining structure for a pipeline, characterized in that the side portion and the inclined portion of the inner surface member connecting material are inserted into the concave inserted portion of the inner surface member, and the side portion and the concave inserted portion are tightly fitted together.

4. A method for lining a pipeline, comprising a connecting step of connecting inner surface members attached to inner circumferential sides of pipeline reinforcement members disposed along the inner surface of the pipeline in a longitudinal direction of the pipeline with an inner surface member connecting member, 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 The inner surface member connecting member is a wall surface portion that faces the side wall portion when the inner surface members are connected to each other; side surfaces provided at both ends of the wall surface portion in the circumferential direction, protruding toward the inner surface, and continuously formed along the longitudinal direction, the side surfaces being inserted into the recessed insertion portion; inclined portions provided so as to protrude in the longitudinal direction from both sides of the side surface portion in the longitudinal direction; and the inclined portion is inclined toward the inner surface of the pipe toward the end in the longitudinal direction, an application step of applying an adhesive to a predetermined position of the wall surface portion of the inner surface member connecting material; a connecting step for connecting the inner surface member and the inner surface member connecting material to each of the pair of inner surface members after the application step, by inserting the inclined portion and the side portion of the inner surface member connecting material into the concave insertion portion of the inner surface member while changing the insertion angle,

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