JP2023082398A - Inner face member connecting material and conduit lining structure having the same - Google Patents

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 The present invention relates to an inner surface member connecting member employed in a pipeline lining structure for reinforcing an existing pipeline, and a pipeline lining structure including the same.

As a technique for reinforcing existing pipelines such as aging water pipes, sewage pipes, or agricultural water pipes, various techniques have been proposed in which the inner surfaces of pipelines are entirely covered with a reinforcing material. For example, there is known an existing pipe repair structure suitable for covering the inner surface of a large-diameter pipe that allows a person to enter and work inside the pipe (see, for example, Patent Document 1). The existing pipe repair structure described in Patent Document 1 is to sequentially connect pipe-shaped rehabilitating pipe constituent members each composed of a plurality of belt-shaped portions in the longitudinal direction of the pipeline. The rehabilitating pipe components are connected to each other via a joint member.

JP 2014-196802 A

However, the structure for repairing an existing pipe disclosed in Patent Document 1 is configured such that a joining member is fitted to the belt-like portion, and a small gap may remain between the belt-like portion and the joining member, allowing water to permeate. Therefore, it is conceivable to seal the gap with a resin sealing material such as silicone sealant. However, it takes time and effort to apply and dry the sealant.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inner surface member connecting member capable of improving workability while ensuring watertightness, and a pipeline lining structure including the same.

The present invention provides an inner surface member connecting member that connects inner surface members attached to the inner peripheral side of a pipeline reinforcing member arranged along the inner surface of a pipeline in the longitudinal direction of the pipeline, wherein the inner surface member is , a side wall covering the inner surface of the pipe along the longitudinal direction, and provided at both ends of the side wall in the circumferential direction of the pipe, projecting toward the inner surface of the pipe, a recessed inserted portion continuously formed along the longitudinal direction, the wall portion facing the side wall portion when the inner surface members are connected to each other, and the wall portion in the circumferential direction. Insertion portions provided at both ends, protruding toward the inner surface and inserted into the recessed inserted portion, and a connection sandwiched between the two inner surface members when the inner surface members are connected to each other. and a portion, wherein the connection portion includes a base portion, a first end surface provided on both sides of the base portion in the longitudinal direction and facing the end surface of the side wall portion in the longitudinal direction, and It has a second end surface facing the end surface of the concave inserted portion, and has a contact portion made of an elastic body.

According to the present invention, the end face of the side wall portion in the longitudinal direction is in contact with the first end face of the contact portion made of an elastic body, and the end face of the recessed inserted portion in the longitudinal direction is in contact with the second end face of the contact portion. is abutted. When the inner surface members are connected to each other, the abutting portion is elastically deformed to fill a minute gap between the connecting portion and the inner surface member. As a result, watertightness can be ensured at the connecting portion between the inner surface members. Further, since it is not necessary to seal the gap with a resin sealing material or the like, it is possible to improve the workability when connecting the inner surface members adjacent to each other in the longitudinal direction, and shorten the time required for the work. can.

It is a structure explanatory drawing of a lining structure, and is a figure which cut|disconnects and shows the existing pipeline and lining structure in the vertical cross section along the longitudinal direction. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; FIG. 3 is an enlarged view of a B portion in FIG. 2; FIG. 4 is a cross-sectional view along the longitudinal direction of an existing pipeline, showing a state in which only the pipeline reinforcing material is arranged along the inner surface of the existing pipeline; FIG. 2 is a front view of the inner surface member shown in FIG. 1; FIG. 2 is a perspective view of an inner surface member connecting member shown in FIG. 1; It is a perspective view of an inner surface member connecting member, and is a view excluding a connecting portion. FIG. 8 is an enlarged view of a central portion C in the longitudinal direction of the insertion portion in FIG. 7; FIG. 7 is a perspective view of the connecting portion shown in FIG. 6; FIG. 10 is a perspective view showing a state in which the inner surface member connecting member is being inserted into the inner surface member; It is a front view of an inner surface member, and is a figure which shows the state which the inner surface member connection member fitted in the inner surface member. FIG. 4 is a cross-sectional view of an existing pipeline showing a state before an inner surface member is arranged along the inner surface of the existing pipeline; FIG. 4 is a cross-sectional view of an existing pipeline showing a state in which lining of the existing pipeline is completed; It is a perspective view of the inner surface member connection material in a modification.

Hereinafter, a pipeline lining structure employing an inner surface member connecting member according to an embodiment of the present invention will be described below with reference to the drawings. The pipeline lining structure (lining structure) according to the present invention is a lining structure suitable for covering and reinforcing the inner surface of existing pipelines such as aged water pipes, sewage pipes, or agricultural water pipes. However, it is a technique that can also be applied when coating the inner surface (secondary lining) of these newly installed pipelines.

(Configuration of lining structure)
FIG. 1 is a structural explanatory diagram of a lining structure 100 according to the present invention, and shows an existing pipeline P and the lining structure 100 cut in a vertical cross section along the longitudinal direction. 2 shows a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 shows an enlarged view of a portion B in FIG. Furthermore, FIG. 4 shows a state in which only the pipeline reinforcing member 1 is arranged along the inner surface of the existing pipeline P, for explaining the pipeline reinforcing member 1, along the longitudinal direction of the existing pipeline P. It is a sectional view. As will be described later, after the lining structure 100 is constructed in the existing pipeline P, the backfill filling space S is filled with the self-hardening filler 99 (see FIG. 13). FIG. 3 shows the state before the self-hardening filler 99 is filled.

As shown in FIGS. 1 to 3, the lining structure 100 includes a pipeline reinforcing member 1, a fitting member 4, an inner surface member 2, and an inner surface member connecting member 3. It is configured in a cylindrical shape along the The pipeline reinforcing member 1 is in the shape of a hollow framework and is arranged along the inner surface of the existing pipeline P. As shown in FIG. A plurality of fitting members 4 are arranged on the inner peripheral side of the pipeline reinforcing member 1 . The inner surface member 2 is attached to the conduit reinforcing member 1 via a plurality of fitting members 4 .

(Conduit reinforcing material)
As shown in FIGS. 2 and 4 , the pipeline reinforcing member 1 has a ring-shaped reinforcing member 11 and a connecting member 12 . The ring-shaped reinforcing member 11 is ring-shaped, and a plurality of the ring-shaped reinforcing members 11 are arranged along the longitudinal direction of the existing pipeline P at predetermined intervals. As shown in FIG. 3, on the inner peripheral side of the ring-shaped reinforcing member 11, a plurality of fitting portions 11a for fitting the fitting members 4 are formed at equal intervals in the circumferential direction of the existing pipeline P. .

The material of the ring-shaped reinforcing member 11 is preferably steel from the viewpoint of cost and strength, but is not particularly limited, and may be carbon steel, stainless steel, synthetic resin, or the like. Further, the ring-shaped reinforcing member 11 may be formed, for example, by connecting a plurality of arcuate members divided in the circumferential direction to each other.

As shown in FIG. 4, the plurality of connecting members 12 connect the ring-shaped reinforcing members 11 to each other. By connecting the ring-shaped reinforcing members 11 to each other with a plurality of connecting members 12, the pipeline reinforcing member 1 is configured in a hollow cylindrical shape.

As shown in FIG. 4, the connecting member 12 has a pipe member 12c, a connecting bolt 12a, and a nut 12b. The pipe material 12c is arranged 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 at both ends of the connecting bolt 12a. A nut 12b is screwed onto each male thread of the connecting bolt 12a.

By inserting the connecting bolt 12a into the pipe material 12c interposed between the two adjacent ring-shaped reinforcing members 11 and screwing the nuts 12b into the male threaded portions at both ends, the connecting member 12 can be connected to the two adjacent ring-shaped reinforcing members 11. The ring-shaped reinforcing members 11 are connected and integrated with each other. Here, even if there is a bend or a step in the existing pipeline P, it is possible to deal with them by appropriately changing the lengths of the pipe member 12c and the connecting bolt 12a in the circumferential direction. Further, instead of the pipe member 12c, a connecting bolt 12a with a nut 12b pre-screwed to the middle of both ends is used as a spacer, and the ring-shaped reinforcing member 11 is sandwiched between another nut 12b and connected and integrated. may be changed. In the final stage of construction, an uncured self-curing filler 99 is injected into the gap (backfill filling space S) between the ring-shaped reinforcing member 11 and the existing pipeline P, as will be described later.

(Fitting member)
As shown in FIGS. 2 and 3, a plurality of fitting members 4 are attached to the inner peripheral side of the pipeline reinforcing member 1 along the longitudinal direction of the existing pipeline P in parallel with each other. As shown in FIG. 3, the fitting member 4 is a molded body with a uniform cross-section having an angular C-shape whose cross-sectional shape is substantially the same as that of the fitting portion 11a of the ring-shaped reinforcing member 11 described above. Moreover, the longitudinal length of the fitting member 4 has a fixed length of, for example, about 5 m.

The fitting member 4 is attached to the pipeline reinforcing member 1 so that the opening of the fitting member 4 faces the center of the existing pipeline P (that is, the inside of the existing pipeline P in the radial direction). The fitting member 4 is fitted into each fitting portion 11a of the ring-shaped reinforcing member 11 provided in the longitudinal direction of the . A plurality of fitting members 4 having a certain length are connected in the longitudinal direction of the existing pipeline P to cover the repair length. That is, a plurality of fitting members 4 are connected by a connecting member (not shown) in a state in which the end surfaces adjacent to each other in the longitudinal direction are in contact with each other. and is attached to the pipeline reinforcing member 1 in its entirety.

The material of the fitting member 4 is preferably a thermoplastic resin such as an olefin-based resin such as polyethylene resin, which has excellent corrosion resistance, is lightweight, has excellent workability, and is inexpensive. Thermosetting resins such as resins, fiber-reinforced plastics with higher strength, thermoplastic resins having flame retardancy, and metals such as stainless steel can also be used.

(inner surface member)
As shown in FIGS. 2 and 3, the inner surface member 2 is mounted on the inner peripheral side of the pipeline reinforcing member 1 via a plurality of fitting members 4 mounted in the longitudinal direction and the circumferential direction of the existing pipeline P. It is attached to the pipeline reinforcement 1 .

The inner surface member 2 has a certain length along the longitudinal direction of the existing pipeline P, for example, a length of about 5 m. A plurality of inner surface members 2 having a certain length are connected in the longitudinal direction of the existing pipeline P to cover the repair length. That is, a plurality of inner surface members 2 are connected by the inner surface member connecting member 3 in a state in which the end surfaces adjacent to each other in the longitudinal direction are in contact with each other, so that the length corresponding to the repair length of the existing pipeline P as a whole is obtained. The whole is attached to the pipeline reinforcing member 1 via the fitting member 4 .

5 is a front view of the inner surface member 2 shown in FIG. 1. FIG. As shown in FIGS. 3 and 5, the inner member 2 has a symmetrical uniform cross section. As shown in FIG. 5 , the inner surface member 2 has a side wall portion 22 and a recessed inserted 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. As shown in FIG. The side wall portion 22 is formed so as to be curved toward the inner surface side (upper side in the figure) of the existing pipeline P from both ends in the circumferential direction of the existing pipeline P toward the central portion. It has an end face 22a in the direction.

The recessed inserted portions 21 are provided at both end portions of the side wall portion 22 in the circumferential direction of the existing pipeline P, respectively. The two recessed inserted portions 21 each protrude toward the inner surface side (outer side in the radial direction) (upper side in the figure) of the existing pipeline P. As shown in FIG. The concave inserted portion 21 is formed continuously along the longitudinal direction of the inner surface member 2 .

As shown in FIG. 5, the concave inserted 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. As shown in FIG. The protruding portion 21a protrudes from the circumferential end of the side wall portion 22 to one side (the inner surface side of the existing pipe P) in the thickness direction of the side wall portion 22 (the radial direction of the existing pipe P). The inclined portion 21b extends from the tip of the projecting portion 21a so as to be inclined toward the side wall portion 22 . A portion surrounded by the projecting portion 21a, the inclined portion 21b, and the side wall portion 22 constitutes a concave portion 23. As shown in FIG.

The recessed inner dimension H2 of the recessed inserted portion 21 is formed to be uniform along the longitudinal direction of the inner surface member 2 . Although details will be described later, the insertion portion 33 of the inner surface member connecting member 3 is inserted into the recessed inserted portion 21 .

As shown in FIG. 3, the recessed inserted portions 21 of the two inner members 2 (edges along the longitudinal direction of the inner members 2 and one end portion of the existing pipeline P of one inner member 2 in the circumferential direction) and the other end in the circumferential direction of the existing pipeline P of another inner member 2 adjacent to the one inner member 2 are paired, and the inner member 2 is inserted into the opening portion of the fitting member 4 As a result, the tip of the inclined portion 21b of the concave inserted portion 21 is locked to the opening portion of the fitting member 4. As shown in FIG. In this way, the inner surface member 2 is securely held by the conduit reinforcing member 1 via the fitting member 4 .

The inner surface member 2 is made of a thermoplastic resin such as an olefin-based resin such as polyethylene resin, which has excellent corrosion resistance, is lightweight, has excellent workability, and is inexpensive, similarly to the fitting member 4 described above. However, it is also possible to use thermosetting resins such as unsaturated polyester resins, fiber-reinforced plastics with higher strength, thermoplastic resins having flame retardancy, and metals such as stainless steel.

When selecting the material of the inner surface member 2 and determining the thickness of the inner surface member 2, when the inserting portion 33 of the inner surface member connecting member 3 is inserted into the concave inserted portion 21, the concave inserted portion 21 spreads. When the insertion portion 33 is pulled out from the concave inserted portion 21, the concave portion inner dimension H2 of the concave inserted portion 21 returns to its original size. It is preferable that the concave inserted portion 21 is elastically deformed as shown in FIG.

(Seal material)
As shown in FIG. 3, between each fitting member 4 and the recessed inserted portions 21 of the two inner surface members 2 attached to each fitting member 4 that are in contact with each other, for example, thermoplastic elastomer or , synthetic rubber, water-swellable rubber, or the like. Thereby, the watertightness between the inner members 2 adjacent to each other in the circumferential direction of the existing pipeline P can be obtained.

(Inner surface member connecting material)
FIG. 6 is a perspective view of the inner surface member connecting member 3 shown in FIG. As shown in FIG. 6, the inner surface member connecting member 3 is a symmetrical plate-shaped member having a certain length, and has a U-shaped cross section in a direction orthogonal to the longitudinal direction. The inner surface member connecting member 3 connects the inner surface members 2 together in the longitudinal direction of the existing pipeline P. As shown in FIG.

The inner surface member connecting member 3 has a body portion 31 having a wall surface portion 32 and an insertion portion 33 and a connection portion 34 . The wall surface 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.

The insertion portions 33 are provided at both ends of the wall surface portion 32 in the circumferential direction of the existing pipeline P, respectively. The two insertion portions 33 protrude outward from the inner surface of the existing pipeline P (upper side in the drawing). The insertion portion 33 is formed continuously along the longitudinal direction of the inner surface member connecting member 3 . The insertion portion 33 is inserted into the concave inserted portion 21 of the inner surface member 2 .

FIG. 7 is a perspective view of the inner surface member connecting member 3, excluding the connecting portion 34. FIG. As indicated by an arrow X in FIG. 7, the insertion portion 33 is formed such that the height of the protrusion increases from both ends in the longitudinal direction toward the central portion C in the longitudinal direction. The insertion portion 33 has a maximum projection height H1 at a central portion C (excluding a recess portion 33a, which will be described later) in the longitudinal direction.

FIG. 8 is an enlarged view of the central portion C in the longitudinal direction of the insertion portion 33 in FIG. As shown in FIG. 8, the insertion portion 33 is formed so that the protrusion height H1 at the central portion C in the longitudinal direction continues for a predetermined length L at a constant height H1 along the longitudinal direction. . A concave portion 33 a is formed in the central portion C of the insertion portion 33 in the longitudinal direction. A claw portion 34c of a base portion 34a of the connection portion 34, which will be described later, is fitted into the concave portion 33a.

Here, for the body portion 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 adopted.

The connecting portion 34 is sandwiched between the two inner members 2 when the inner members 2 are connected to each other. FIG. 9 is a perspective view of the connecting portion 34 shown in FIG. As shown in FIG. 9, the connection portion 34 has a base portion 34a and a contact portion 34b. The base portion 34a has a U-shaped cross section in the direction orthogonal to the longitudinal direction, and has claw portions 34c at both ends. The connecting portion 34 is fitted to the main body portion 31 by engaging the claw portion 34 c with the recessed portion 33 a of the insertion portion 33 .

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 surface member connecting member 3, respectively. The contact portion 34b has 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 facing the end face 21c of the concave inserted portion 21 in the longitudinal direction of the inner member 2. 34f.

The base portion 34a has stopper portions 34d at both ends thereof. The stopper portions 34d are provided on both sides of the claw portion 34c in the longitudinal direction of the inner surface member connecting member 3, respectively. In the longitudinal direction of the inner surface member connecting member 3, the surface of the stopper portion 34d is positioned inside the connecting portion 34 relative to the surface of the contact portion 34b. A portion of the end face 21c of the concave inserted portion 21 in the longitudinal direction of the inner surface member 2 in the vicinity of the tip of the inclined portion 21b abuts against the stopper portion 34d.

Here, for the base portion 34a of the connection portion 34, a thermoplastic resin molded product, a thermosetting resin (including FRP) molded product, or the like is adopted. The contact portion 34b of the connection portion 34 is made of thermoplastic elastomer, rubber, or the like, which is more flexible than the base portion 34a. The material of the stopper portion 34d is preferably harder than that of the contact portion 34b, and is preferably the same as that of the base portion 34a.

FIG. 10 is a perspective view showing a state in which the inner surface member connecting member 3 is being inserted into the inner surface member 2. FIG. In order to connect the two inner members 2 in the longitudinal direction using the inner member connecting member 3, first, as shown in FIG. The insertion portion 33 of the material 3 is inserted to approximately half of its length, and the end surface 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 surface 34e of the contact portion 34b of the connection portion 34. At the same time, 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 contact portion 34b of the connecting portion 34 . As a result, the one inner surface member 2 and the inner surface member connecting member 3 are fitted (closely fitted), and the remaining approximately half of the insertion portion 33 of the inner surface member connecting member 3 protrudes.

Next, the recessed 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 surface 22 a of the side wall portion 22 in the longitudinal direction of the inner surface member 2 is brought into contact with the connection portion 34 . The first end surface 34e of the portion 34b is brought into contact with the second end surface 34f of the contact portion 34b of the connecting portion 34 so that the end surface 21c of the concave inserted portion 21 in the longitudinal direction of the inner surface member 2 is brought into contact. As a result, the other inner surface member 2 and the inner surface member connecting member 3 are fitted (tightly fitted).

When the connection portion 34 is sandwiched between the two inner members 2, the contact portion 34b is elastically deformed and compressed. As a result, a minute gap between the connecting portion 34 and the inner surface member 2 is filled. When the tip portion of the inclined portion 21b of the end surface 21c of the recessed inserted portion 21 abuts against the stopper portion 34d of the connecting portion 34, the inner surface member 2 is stopped with respect to the connecting portion 34 and the abutting portion 34b. is constant at a predetermined amount. In this embodiment, the thickness of the contact 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 contact portion 34b is 0.1 to 0.8 mm. .

Here, Table 1 shows the test results of the water tightness test of the contact portion 34b. This test is for determining the thickness of the stopper portion 34d of the connection portion 34, and is performed without providing the stopper portion 34d. The inner surface members 2 are connected to each other by the inner surface member connecting member 3, the end surface 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 surface 34e of the contact portion 34b, and the longitudinal direction of the inner surface member 2 is When the end face 21c of the recessed inserted portion 21 is brought into contact with the second end face 34f of the contact portion 34b and compressed, the amount of compression of the contact portion 34b is changed to change the amount of compression of the contact portion 34b for 3 minutes under a water pressure of 0.1 MPa. It is evaluated whether or not water leaks from the gap between the inner surface member 2 and the connecting portion 34 within a certain period of time. From the evaluation results, if the amount of compression of the contact portion 34b is larger than a predetermined amount, the contact portion 34b protrudes from between the end surfaces 21c and 22a of the inner surface member 2 and the base portion 34a.

When the inner surface members 2 are connected to each other, the abutment portion 34b is elastically deformed, so that a minute gap between the connection portion 34 and the inner surface member 2 is filled. As a result, watertightness can be ensured at the connecting portion between the inner surface members 2 . Since there is no need to seal the gap with a resin sealing material or the like, it is possible to improve the workability when connecting the inner surface members 2 adjacent to each other in the longitudinal direction, and to shorten the time required for the work. can be done.

Further, when a portion of the end face 21c of the recessed inserted portion 21 contacts the stopper portion 34d, the amount of compression of the contact portion 34b reaches a predetermined amount. If the amount of compression of the contact portion 34b is smaller than a predetermined amount when the inner members 2 are connected to each other, water may enter the gap between the connecting portion 34 and the inner member 2 . Further, when the inner surface members 2 are connected to each other, if the compression amount of the contact portion 34b is larger than a predetermined amount, the contact portion 34b protrudes from between the end surfaces 21c and 22a of the inner surface member 2 and the base portion 34a. There is fear. Therefore, a stopper portion 34d is provided at the base portion 34a of the connection portion 34 so that the amount of compression of the contact portion 34b becomes a predetermined amount when the inner surface members 2 are connected to each other. can be secured.

Here, the recessed portion dimension H2 (see FIG. 5) of the recessed insertion portion 21 is slightly larger than the height of the protrusions at both ends in the longitudinal direction of the inner surface member connecting member 3, and the height of the protrusions at the central portion C in the longitudinal direction. It is slightly smaller than the height H1 (see FIG. 7).

FIG. 11 is a front view of the inner surface member 2, showing a state in which the inner surface member connecting member 3 is fitted to the inner surface member 2. FIG. As shown in FIG. 11, when the two inner members 2 are connected in the longitudinal direction, the inserting portion 33 of the inner member connecting member 3 pushes the concave inserted portion 21 of the inner member 2 apart. As a result, the frictional force increases at the contact portion Y between the longitudinal central portion C where the height of the convex portion of the insertion portion 33 is maximum and the inner side of the concave inserted portion 21 , and the inner surface member connecting member 3 is As the inner surface member 2 is inserted into the member 2 , the arched central portion of the side wall portion 22 of the inner surface member 2 is pressed against the wall surface portion 32 of the inner surface member connecting member 3 . As a result, the frictional force at the contact portion Z between the wall surface portion 32 of the inner surface member connecting member 3 and the side wall portion 22 of the inner surface member 2 increases. By these, the inner surface member 2 and the inner surface member connecting member 3 are strongly connected to each other.

When each of the longitudinal end faces of the two inner members 2 abuts against the abutting portion 34b of the connecting portion 34, the recessed inserted portion 21 of the inner member 2 and the insertion portion 33 of the inner member connecting member 3 are aligned. The inner dimension H2 of the recessed insertion portion 21 and the height H1 of the projection of the insertion portion 33 are determined so that they are tightly fitted. That is, the inner dimension H2 of the concave inserted portion 21 and the height H1 of the convex portion of the inserted portion 33 depend on the material and thickness of the inner surface member 2 and the inner surface member connecting member 3, It is determined in consideration of the degree of elastic deformation.

(Laying method of lining structure)
Next, a method for laying the lining structure 100 in the existing pipeline P will be described. 12 is a cross-sectional view of the existing pipeline P showing a state before the inner surface member 2 is arranged along the inner surface of the existing pipeline P. FIG. FIG. 13 is a cross-sectional view of the existing pipeline P showing a state in which the lining of the existing pipeline P is completed.

First, at the time of construction, a weir, for example, is installed on the upstream side of the existing pipeline P. Alternatively, an environment in which people can work in the existing pipeline P is created by a method such as arranging a bypass and performing a water change. Then, the pipeline reinforcing material 1 is arranged along the inner surface of the existing pipeline P. As shown in FIG. The ring-shaped reinforcing member 11 that constitutes the pipeline reinforcing member 1 is usually formed by assembling a plurality of split arc-shaped members inside the existing pipeline P. As shown in FIG. Then, a plurality of ring-shaped reinforcing members 11 in which a part or all of the members are assembled are connected in the longitudinal direction of the existing pipeline P by connecting members 12 to obtain a tubular pipeline reinforcing member 1 .

After the pipeline reinforcing member 1 is completely assembled, the fitting members 4 are fitted into the respective fitting portions 11 a of the ring-shaped reinforcing member 11 constituting the pipeline reinforcing member 1 . FIG. 12 shows a cross-sectional view of a state in which the fitting member 4 is fitted into the ring-shaped reinforcing member 11. As shown in FIG. Next, the inner member 2 is paired and fitted to the fitting member 4 . The inner surface member 2 is connected using the inner surface member connecting member 3 by the method described above to form a continuous body in the longitudinal direction. 1 and 2 are sectional views showing a state in which the inner surface member 2 is fitted to the fitting member 4. FIG. In this embodiment, it is not always necessary to use the fitting member 4, and the inner surface member 2 may be directly fitted to the ring-shaped reinforcing member 11 constituting the pipeline reinforcing member 1 by fitting.

1 and 2 is attached to the pipeline reinforcing member 1, the self-hardening filler 99 is injected between the inner member 2 and the existing pipeline P to fill the space between them. Harden. The final structure, infused with self-curing filler 99, is shown in cross-section in FIG. As the self-hardening filler 99, cement-based materials such as cement milk, mortar, and concrete, or thermosetting resins such as unsaturated polyester resins and epoxy resins can be used. selected. When injecting the self-hardening filler 99, it may be injected after a fitting form or the like is installed at the end of the existing pipeline P, or an injection port may be provided in the inner surface member 2 for injection.

(Modification)
In addition, the inner surface member connecting member 3 is not limited to that shown in FIG. FIG. 14 is a perspective view of an inner surface member connecting member 103 in a modified example. The inner surface member connecting member 103 has a body portion 131 and a connecting portion 34 . The connecting portion 34 of the inner surface member connecting member 103 is the same as the connecting portion 34 of the inner surface member connecting member 3 described above. The body portion 131 of the inner member connecting member 103 is made of the same material as the body portion 31 of the inner member connecting member 3 described above.

The body portion 131 has a wall portion 132 , a side portion 133 and an inclined portion 134 . The wall surface portion 132 faces the side wall portion 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 portion 132 in the longitudinal direction of the inner surface member connecting member 3 are concavely curved toward the center of the wall surface portion 132 in the longitudinal direction.

The wall surface portion 132 is coated with an adhesive 140 for bonding the side wall portion 22 of the inner surface member 2 and the wall surface portion 132 . The adhesive 140 is applied to substantially both ends (predetermined positions) of the wall surface portion 132 in the longitudinal direction.

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

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

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

Here, the inner surface member 2 is long in the longitudinal direction (about 5 m). As shown in FIG. 10, in order to insert the other inner surface member 2 into the inner surface member connecting member 3 which is inserted into one of the inner surface members 2 and is oriented obliquely with respect to the inner surface of the existing pipeline P, the other inner surface member 2 must be The end of member 2 must be lifted parallel to inner member connector 3 . Since the inner surface member 2 is long, in order to make the end portion of the inner surface member 2 parallel to the inner surface member connecting member 3, a long range of the end portion of the inner surface member 2 must be lifted, which is a burden on the operator.

On the other hand, in order to connect two inner members 2 in the longitudinal direction using the inner member connecting member 103 of the modified example, first, the end of one of the inner members 2 is lifted, and the recessed cover of this end is One inclined portion 134 of the inner surface member connecting member 103 is inserted into the insertion portion 21, and further, the side surface portion 133 of the inner surface member connecting member 103 is inserted up to approximately half of its length, so that the side surface portion 133 and the concave inserted portion are inserted. 21 are tightly fitted. At this time, the inclined portion 134 is inserted parallel to the longitudinal direction of the concave inserted portion 21 , and then the side portion 133 is inserted parallel to the longitudinal direction of the concave inserted portion 21 . Since the inclined portion 134 is inclined with respect to the side surface portion 133 , the inner surface member 2 is inclined when the inclined portion 134 is inserted into the concave inserted portion 21 and when the side surface portion 133 is inserted into the concave inserted portion 21 . The insertion angle of the inner surface member connecting member 103 with respect to is different.

When the inner surface member connecting member 103 is inserted into one of the inner surface members 2, the end surface 22a of the side wall portion 22 in the longitudinal direction of the inner surface member 2 contacts the first end surface 34e of the contact portion 34b of the connection portion 34, and the inner surface member 2 The end face 21c of the recessed inserted portion 21 in the longitudinal direction of .

Next, the end of the other inner surface member 2 is lifted, and the recessed inserted portion 21 of this end is inserted into the other exposed inclined portion 134 and further into the remaining approximately half of the side surface portion 133 . Then, the side surface portion 133 and the concave inserted portion 21 are tightly fitted. At this time, the concave inserted portion 21 is inserted along the inclination of the inclined portion 134 , and then the concave inserted portion 21 is inserted parallel to the longitudinal direction of the side portion 133 . Since the inclined portion 134 is inclined with respect to the side surface portion 133 , the inner surface member is connected when the concave inserted portion 21 is inserted into the inclined portion 134 and when the concave inserted portion 21 is inserted into the side surface portion 133 . The insertion angle of the inner surface member 2 with respect to the material 103 is different.

When the other inner surface member 2 is inserted into the inner surface member connecting member 103, the end surface 22a of the side wall portion 22 in the longitudinal direction of the inner surface member 2 contacts the first end surface 34e of the contact portion 34b of the connecting portion 34, and the inner surface member 2 The end face 21c of the recessed inserted portion 21 in the longitudinal direction of .

In this manner, when inserting the concave inserted portion 21 into the inclined portion 134 , the concave inserted portion 21 can be inserted along the inclination of the inclined portion 134 . As a result, when inserting the other inner surface member 2 into the inner surface member connecting member 103 which is inserted into one of the inner surface members 2 and is slanted with respect to the inner surface of the existing pipeline P, the end portion of the inner surface member 2 To easily insert the inner surface member 2 into the inclined portion 134 by slightly lifting the end portion of the inner surface member 2 to make it parallel to the inclined portion 134 without greatly lifting the inner surface member 2 to make it parallel to the wall surface portion 132 and the side surface portion 133. can be done. As a result, compared to the case where the end of the inner surface member 2 is parallel to the wall surface portion 132 and the side surface portion 133, the lifting range of the end portion of the inner surface member 2 becomes shorter, thereby reducing the burden on the operator. As a result, it is possible to facilitate the work of connecting the inner members 2 adjacent to each other in the longitudinal direction, and to shorten the time required for the work.

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 end of the wall surface portion 132 from interfering with the end surface 22 a of the side wall portion 22 of the inner surface member 2 when the recessed inserted portion 21 is inserted into the inclined portion 134 . Therefore, the recessed inserted portion 21 can be smoothly inserted into the inclined portion 134 .

In addition, since the insertion angle of the inner surface member 2 with respect to the inner surface member connecting member 103 differs between when the concave inserted portion 21 is inserted into the inclined portion 134 and when the concave inserted portion 21 is inserted into the side surface portion 133, By a series of movements of inserting the inner surface member 2 while changing the angle, the side wall portion 22 comes into contact with the wall surface portion 132 while covering the wall surface portion 132 . Therefore, the predetermined amount of adhesive 140 applied to the wall surface portion 132 is excessively spread by the surface facing the wall surface portion 132 of the side wall portion 22 of the inner surface member 2 or contacts the end portion of the side wall portion 22 . It remains between the inner surface member 2 and the inner surface member connecting member 103 at a recessed position of the side wall portion 22 without being scraped off. In this way, just by inserting the other inner surface member 2 into the inner surface member connecting member 103, the adhesive 140 can be held in place without being pushed out from the position where the adhesive 140 was first applied. The member connecting member 103 can be reliably adhered. The same applies when inserting the inner surface member connecting member 103 into one of the inner surface members 2 . As described above, the inner members 2 are reliably connected to each other in the longitudinal direction of the existing pipeline P by the inner member connecting member 103 .

(effect)
As described above, according to the inner surface member connecting member 3 and the lining structure 100 according to the present embodiment, the first end surface 34e of the contact portion 34b made of an elastic body has the end surface 22a of the side wall portion 22 in the longitudinal direction. , and the end face 21c of the recessed inserted portion 21 in the longitudinal direction is brought into contact with the second end face 34f of the contact portion 34b. When the inner surface members 2 are connected to each other, the abutment portion 34b is elastically deformed, so that a minute gap between the connection portion 34 and the inner surface member 2 is filled. As a result, watertightness can be ensured at the connecting portion between the inner surface members 2 . Since there is no need to seal the gap with a resin sealing material or the like, it is possible to improve the workability when connecting the inner surface members 2 adjacent to each other in the longitudinal direction, and to shorten the time required for the work. can be done.

Further, when part of the end surface 21c of the recessed inserted 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 contact portion 34b is less than a 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 . Further, when the inner surface members 2 are connected to each other, if the amount of compression of the contact portion 34b is larger than a predetermined amount, the contact portion 34b protrudes from between the end surfaces 21c and 22a of the inner surface member 2 and the base portion 34a. There is fear. Therefore, a stopper portion 34d is provided at the base portion 34a of the connection portion 34 so that the amount of compression of the contact portion 34b becomes a predetermined amount when the inner surface members 2 are connected to each other. can be secured.

Although the embodiments of the present invention have been described above, the specific examples are merely illustrated, and the present invention is not particularly limited. In addition, the actions and effects described in the embodiments of the invention are merely enumerations of the most suitable actions and effects resulting from the present invention, and the actions and effects of the present invention are described in the embodiments of the invention. are not limited to those listed.

REFERENCE SIGNS LIST 1 pipeline reinforcing member 2 inner member 3 inner member connecting member 4 fitting member 5 sealing member 11 ring-shaped reinforcing member 11a fitting portion 12 connecting member 12a connecting bolt 12b nut 12c pipe member 21 recessed inserted portion 21a projecting portion 21b Inclined portion 21c End face of recessed inserted portion 22 Side wall portion 22a End face of side wall portion 23 Recess 31 Body portion 32 Wall surface portion 33 Insertion portion 33a Recess 34 Connection portion 34a Base 34b Contact portion 34c Claw portion 34d Stopper portion 34e First end surface 34f Second end surface 99 self-curing filler 100 lining structure 103 inner surface member connecting member 131 body portion 132 wall surface portion 133 side surface portion 134 inclined portion 140 adhesive

Claims (3)

An inner surface member connecting member that connects inner surface members attached to the inner peripheral side of a pipe reinforcing member arranged along the inner surface of a pipe in the longitudinal direction of the pipe,
The inner surface member is
a side wall covering the inner surface of the conduit along the longitudinal direction;
recessed inserted portions provided at both ends of the side wall portion in the circumferential direction of the pipeline, protruding toward the inner surface of the pipeline, and formed continuously along the longitudinal direction;
has
a wall surface portion facing the side wall portion when the inner surface members are connected to each other;
insertion portions provided at both end portions of the wall surface portion in the circumferential direction, projecting toward the inner surface side, respectively, and inserted into the recessed inserted portions;
a connecting portion sandwiched between the two inner surface members when the inner surface members are connected to each other;
has
The connecting part is
a base;
It is provided on both sides of the base portion in the longitudinal direction, and has 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 concave inserted portion in the longitudinal direction. and a contact portion made of an elastic body;
An inner surface member connecting member characterized by having: the base portion has a stopper portion with which an end surface of the recessed inserted portion in the longitudinal direction abuts;
2. The inner surface member connecting member according to claim 1, wherein when the end surface of said recessed inserted portion contacts said stopper portion, said contact portion is compressed by a predetermined amount. The inner surface member connecting member according to claim 1 or 2,
the inner surface member;
has
When the insertion portion is inserted into the recessed inserted portion and the inner surface member and the inner surface member connecting member are closely fitted, the end surface of the side wall portion and the first end surface in the longitudinal direction abut, A pipeline lining structure, wherein an end surface of the concave inserted portion and the second end surface are in contact with each other.

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