Flexible water-stopping member mounting structure

Abstract

To provide a mounting structure for a flexible water stop member that can secure a space and adjust tightening torque even after the flexible water stop member is installed.SOLUTION: A mounting structure 100 for a flexible water stop member has a structure in which anchoring portions 2b at both ends of a flexible water stop member 2 which is flexible and has a bulging portion 2a in a middle portion are abutted on between connecting portions 1a that intersect with a central axis direction X of a pair of connected bodies 1 to be connected, and the flexible water stop member is tightened with a fastening member 4 by being sandwiched between a pressing member 3 and the connecting portion 1a. The mounting structure is structured of a receiving member 5 attached to the pressing member 3 on a tip side of an operation by a tightening tool T of the fastening member 4 on the bulging portion 2a side, and consisting of a spacer portion 5a having a thickness equal to or greater than a height of a space S and a receiving plate portion 5b attached to the spacer portion 5a to receive the bulge of the bulging portion 2a.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a mounting structure for a flexible water-stopping member. [Background technology]

[0002] The joints of pipes and conduits such as those constructed underground, such as water supply and sewerage systems, agricultural water supply systems, industrial water supply systems, utility conduits, underground passages, tunnels, and submerged tunnels, must be watertight both inside and outside, and must also be able to tolerate uneven settlement of the pipes on both sides of the joint, displacement during earthquakes, and expansion and contraction due to temperature changes. For this reason, flexible watertight materials such as rubber or synthetic resin are installed between the joints. The mounting structure for a flexible water-stopping member to a pipeline such as a culvert is provided as a flexible joint in a flexible segment that constitutes the primary lining of a tunnel constructed using the shield construction method, for example. The anchoring portion of the flexible water-stopping member, which is a flexible, short tube made of rubber or synthetic resin and has a V-shaped bulge in the middle, is placed between annular frame members (inner main girders) attached to the ends of a pair of pipelines to be connected, and the member is sandwiched between the frame members via a pressure member placed on the joint side of the anchoring portion, and is attached by tightening with bolts and nuts in the central axis direction of the pipeline that passes through (see Patent Document 1).

[0003] Furthermore, in the mounting structure for a flexible water-stopping member, if a pair of connected objects move closer to each other, the bulging portion of the flexible water-stopping member may come into contact with the heads of the bolts used for fastening, potentially causing damage. To address this issue, a water-stopping member support having elasticity, such as rubber or foam rubber, is attached to the presser member so as to surround the bolt heads. The water-stopping member support is a plate-like member with dimensions and shape that can fit around the heads of multiple fastening bolts, and bolt insertion holes are formed in positions corresponding to the bolt holes in the presser member. The support is fitted to the presser member and adhered with an adhesive. In this way, the water-stopping member receiving member prevents the flexible water-stopping member from coming into contact with the fixing bolts and being damaged (see Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-184491 [Patent Document 2] Japanese Patent Application Publication No. 10-292468 Summary of the Invention [Problem to be solved by the invention]

[0005] However, after installing the flexible watertight member, when trying to control and adjust the tightening torque of the bolts and nuts that secure them, the heads of the bolts and nuts are covered with the watertight member support material, making it impossible to tighten them with a wrench, which is a tightening tool.In particular, when the bulging part is deformed by water pressure or other factors and becomes swollen, there is even less space for tightening, making it impossible to adjust the tightening torque by tightening.

[0006] The present invention has been made in consideration of the problems of the conventional technology, and aims to provide a mounting structure for a flexible water-stopping member that ensures space and allows adjustment of the tightening torque even after the flexible water-stopping member has been installed. [Means for solving the problem]

[0007] In order to solve the above problems, the mounting structure for a flexible water-stopping member according to the present invention comprises: An attachment structure for a flexible water-stopping member, in which anchoring portions at both ends of the flexible water-stopping member, which is flexible and has a bulge in the middle, are placed between connecting portions that intersect with the central axis direction of a pair of connected bodies to be connected, and the flexible water-stopping member is clamped between a pressing member and the connecting portions and fastened with a fastening member, a spacer portion attached to the pressing member on the bulging portion side at the tip end side of the operation tip of the fastening member by a fastening tool, the spacer portion having a thickness equal to or greater than the height of the fastening space; a receiving plate portion attached to the spacer portion to receive the bulge of the bulging portion, picture, The receiving plate portion extends from the spacer portion to a position overlapping the fastening member as viewed from the central axis direction, and forms the fastening space between the receiving plate portion and the pressing member, the fastening space being open to an operation side of the fastening tool. It is characterized by:

[0008] The connected body is hollow, The flexible water-stopping member is preferably configured in a short cylindrical shape.

[0009] It is preferable that the receiving member is configured such that the spacer portion and the receiving plate portion are divided into a plurality of portions along the connecting portion.

[0010] It is preferable that the receiving member is configured so that the spacer portion and the receiving plate portion have sufficient rigidity to withstand the load caused by the bulging portion.

[0011] It is preferable that the receiving member is configured such that the spacer portion and the pressing member are integrally formed.

[0012] The receiving member is preferably configured such that the spacer portion is attached to the pressing member by adhesive, screws, or welding.

[0013] The receiving member is preferably configured such that the receiving plate portion is attached to the spacer portion by adhesive, screws, welding, or a fitting structure. [Effects of the Invention]

[0014] According to the mounting structure for a flexible water-stopping member of the present invention, even after the flexible water-stopping member is installed, a space can be secured and the tightening torque can be adjusted. [Brief explanation of the drawings]

[0015] [Figure 1] 1A and 1B show an embodiment of a mounting structure for a flexible water-stopping member according to the present invention, in which FIG. 1A is a partial cross-sectional view taken along the central axis, and FIG. 1B is a cross-sectional view taken along line AA in FIG. 1A. [Figure 2] 1A and 1B are a side view and a front view, respectively, of a pressing member and a receiving member according to an embodiment of the present invention. [Figure 3] 10A and 10B are a side view and a front view, respectively, of a pressing member and a receiving member according to another embodiment of the present invention. [Figure 4]1A and 1B are a side view and a front view, respectively, of a pressing member and a receiving member according to an embodiment of the present invention. [Figure 5] 1A and 1B are a side view and a front view, respectively, of a pressing member and a receiving member according to an embodiment of the present invention. [Figure 6] 10A and 10B are a side view and a front view, respectively, of a receiving member according to another embodiment of the present invention. [Figure 7] 1A and 1B are explanatory views showing different insertion directions of a fastening member according to one embodiment of the present invention. [Figure 8] 1A is a partial cross-sectional view taken along the central axis direction, and FIG. 1B is a front view of a receiving member according to one embodiment of the present invention. [Figure 9] 10A and 10B show another embodiment of the present invention, in which (a) is a partial cross-sectional view taken along the central axis, and (b) is a front view of a receiving member. [Figure 10] 1A is a partial cross-sectional view taken along the central axis direction, FIG. 1B is a front view of a spacer portion of a receiving member, and FIG. 1C is a front view of a pressing member and a receiving member according to an embodiment of the present invention. [Figure 11] 1 is a partial cross-sectional view taken along the central axis direction according to an embodiment of the present invention; [Figure 12] FIG. 10 is a partial cross-sectional view taken along the central axis direction of a conventional mounting structure for a flexible water-stopping member. [Figure 13] 1 is a schematic perspective view of an example of an application of the present invention; [Figure 14] FIG. 14 is a cross-sectional view taken along line BB in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mounting structure for a flexible water-stopping member according to the present invention will be described in detail below with reference to the drawings. The mounting structure 100 for a flexible water-stopping member (hereinafter simply referred to as the mounting structure) is a structure in which anchoring portions 2b at both ends of a flexible water-stopping member 2, which is flexible and has a bulge portion 2a in the middle, are placed between connecting portions 1a that intersect with the central axis direction X of a pair of connected bodies 1 to be connected, and the flexible water-stopping member 2 is clamped between a pressing member 3 and the connecting portions 1a and tightened with a fastening member 4, and is configured with a receiving member 5 attached to the pressing member 3 on the tip side of the operation by a tightening tool T of the fastening member 4 on the bulge portion 2a side, and consisting of a spacer portion 5a with a thickness equal to or greater than the height of the space S, and a receiving plate portion 5b attached to the spacer portion 5a to receive the bulge of the bulge portion 2a. The pair of connectable bodies 1 may be joints in a hollow pipeline or in a planar wall surface. The flexible water-stopping member 2 is short and tubular in shape to correspond to the shape of the connectable body 1, and the flexible water-stopping member (not shown) is flat in shape to correspond to the planar wall surface. The hollow connectable body 1 is not limited to a tunnel, but may also be a culvert constructed underground, such as a water supply / sewage system, agricultural water supply, industrial water supply, utility conduit, underground passage, or immersed tunnel. There are no limitations on the cross-sectional shape or use of the pipeline, as long as it is hollow.

[0017] In the following description, a flexible segment 1b of a tunnel, which is a hollow conduit, is used as the connected body 1, and an attachment structure 100 in which a flexible water-stopping member 2 is attached will be described as an example. The flexible segments 1b constitute the primary lining of a tunnel constructed using the shield method, and the flexible segments 1b are connected in a ring shape (see, for example, Figures 13 and 14). Normal shield segments 1c are connected to both ends of the ring-shaped flexible segments 1b in the central axis direction X to form a tunnel (pipe).

[0018] The flexible segment 1b is provided with a ring-shaped frame member 1d that intersects with the central axis direction X to form an inner main girder, and the opposing surfaces of the frame member 1d serve as connecting portions 1a. The frame member 1d is provided, for example, perpendicular to the central axis direction X, and a pair of connecting portions 1a face each other in parallel to form flanges for connection (see FIG. 1). Note that the pair of connecting portions 1a is not limited to being perpendicular to the central axis direction X and facing each other in parallel, but may also have connecting surfaces that are inclined or obliquely arranged to intersect with the central axis direction X.

[0019] The flexible water-stopping member 2 is made of flexible rubber, synthetic resin, or other material and has a short, short cylindrical shape along the central axis X. It has a V-shaped bulge 2a in the middle, and both ends of the flat cylindrical portion along the central axis X serve as anchoring portions 2b. Each of the anchoring portions 2b is L-shaped on the inside (toward the center), and the bulge 2a in the middle is also formed to protrude inward, similar to the anchoring portions 2b. The anchoring portions 2b at both ends of the flexible water-stopping member 2 in the central axis X are respectively abutted against the opposing connection portions 1a of the frame members 1d of the flexible segment 1b, and the bulge 2a is disposed between the pair of frame members 1d. The anchoring portions 2b have bolt holes 2c formed at equal intervals along the circumferential direction. The bulge 2a is not limited to a single V-shaped cross section, and may be Ω-shaped, multiple V-shaped, bellows-shaped, S-shaped, or any other shape that can accommodate expansion and contraction.

[0020] The anchoring portion 2b of the flexible water-stopping member 2 is clamped by a bolt 4a and a nut 4b of a fastening member 4 inserted through the bolt hole 2c while sandwiched between the frame member 1d and the presser member 3 via the presser member 3. The presser member 3 is made of a metal such as steel or synthetic resin and has a head portion 3a with an arc-shaped top surface that protrudes axially toward the surface of the frame member 1d, a plate-like vertical portion 3b extending vertically from the opposite end of the head portion 3a along the central axis direction X, and a plate-like horizontal portion 3c that protrudes from the opposite end of the vertical portion 3b to the surface of the frame member 1d along the central axis direction X. The horizontal portion 3c is set according to the thickness of the anchoring portion 2b of the flexible water-stopping member 2 and has a protruding amount that includes a tightening margin. The presser member 3 is divided into multiple pieces circumferentially. The pressing member 3 has bolt holes formed in the vertical portion 3b through which a plurality of fastening bolts 4a are inserted.

[0021] At the anchoring portion 2b of the flexible water-stopping member 2, if the bulging portion 2a bulges due to water pressure or the like while the flexible water-stopping member 2 is attached, clamped between the frame member 1d and the pressing member 3 and fastened by the fastening member 4, it will interfere with the head of the bolt 4a inserted from the bulging portion 2a side, causing problems such as damage (see Figures 7(a) and 12). To prevent this, a receiving member 5 is provided to cover the head of the bolt 4a. Depending on the insertion direction of the bolt 4a, the bulging portion 2a and the nut 4b may interfere with the bulging portion 21 (see FIG. 7(b)).

[0022] The receiving member 5 is made up of a spacer portion 5a and a receiving plate portion 5b. The spacer portion 5a is formed to a thickness equal to or greater than the height of the tightening space S created by the tightening tool T of the fastening member 4, and is attached to the pressing member 3 on the tip side (upper side in the figure) of the operation by the tightening tool T. When the tightening tool T is inserted from the central axis side toward the outside in the radial direction Y to engage the bolts 4a, the receiving member 5 is arranged along the circumferential direction outside the bolts 4a of the multiple fastening members 4.

[0023] As shown in FIG. 2, the receiving member 5 is attached with an adhesive by disposing a spacer portion 5a at the corner between the head portion 3a and the vertical portion 3b of the pressing member 3, for example. 3, the spacer portion 5a is attached to the vertical portion 3b of the pressing member 3 with the head of the fixing bolt 6a embedded therein. As shown in FIG. 4, the spacer portion 5a is attached to the head portion 3a of the pressing member 3 with the head portion embedded in the fixing bolt 6b. Also, the spacer portion 5a may be formed integrally with the head portion 3a of the pressing member 3 as shown in FIG. Furthermore, as shown in Figure 6, the spacer portion 5a can be attached by forming an integral mounting portion 5c that contacts the vertical portion 3b of the pressing member 3, contacting the surface of the pressing member 3, and fastening them together with the bolt 4a of the fastening member 4.

[0024] The receiving plate portion 5b of the receiving member 5 is a plate material that is arranged on the outside of the spacer portion 5a and ensures the tightening space S. The receiving plate portion 5b is made of a metal or synthetic resin that has enough rigidity to prevent deformation even when the bulging portion 2a expands due to water pressure or the like, and is provided on the spacer portion 5a with a length (width) set to the center side that ensures the tightening space S. This ensures the tightening space S that opens to the center side of the flexible segment (connected body) 1b as the tightening space S when the tightening tool T of the fastening member 4 is used.

[0025] As shown in FIG. 8, for example, the upper end of the receiving plate portion 5b of the receiving member 5 is disposed outside the spacer portion 5a and attached by adhesive or welding. As shown in FIG. 9, the upper end of the receiving plate portion 5b is placed outside the spacer portion 5a and fastened with the head embedded by the mounting bolt 7a placed between the bolts 4a. As shown in Figure 10, an engaging protrusion 5e is formed protruding outward from the spacer portion 5a of the receiving member 5, and an engaging groove 5d is formed on the spacer portion 5a side of the receiving plate portion 5b, and the engaging groove 5d and the engaging protrusion 5e are engaged and connected to each other, thereby forming a so-called tenon structure.

[0026] Due to the tightening space S secured by providing the receiving member 5 on the pressing member 3, even after the flexible water-stopping member 2 has been tightened to the connection portion 1a of the flexible segment 1b, the bulging portion 2a that expands due to water pressure or the like is received by the receiving plate portion 5b and does not interfere with the fastening member 4 (see Fig. 11), and the tightening space S can be secured using the tightening tool T, making it easy to manage the torque of the fastening member 4 (bolt 4a, nut 4b) and adjust and retighten it. In addition, as shown in Fig. 11, interference between the flexible water-stopping member 2 and the fastening member 4 (see Fig. 12), which occurs with previous water-stopping member receiving materials and rubber receiving members, can be prevented, and damage can also be prevented. Furthermore, in the mounting structure 100, the anchor portion 2b of the flexible water-stopping member 2 is fastened with the bolts 4a and nuts 4b, which causes stress relaxation, in which the stress generated in the anchor portion 2b decreases over time. However, this stress relaxation can be easily addressed by torque management, adjustment, and retightening of the fastening members 4 (bolts 4a and nuts 4b). Furthermore, in the mounting structure 100, the attachment of the receiving member 5 suppresses the expansion of the flexible water-stopping member 2, thereby reducing the tension generated in the flexible water-stopping member 2. This reduces the force with which the anchoring portion 2b of the flexible water-stopping member 2 is pulled out, making it possible to reduce the surface pressure required in terms of design and reduce the sizes of the pressing member 3 and fastening member 4, improving workability and contributing to cost reduction.

[0027] In addition, the receiving member 5 may be constructed by combining the fixing structure of the spacer portion 5a and the receiving plate portion 5b, and the shape of the tenon structure between the fitting protrusion and the fitting groove may be determined appropriately as long as it can maintain the fixed state. Furthermore, the installation process for the spacer portion 5a and the receiving plate portion 5b that constitute the receiving member 5 can be determined appropriately taking into consideration ease of construction, and ultimately, it is sufficient that the tightening of the fastening member 4 is completed and the receiving member 5 is in an installed state.

[0028] As specifically explained above in conjunction with the embodiment, the mounting structure 100 for a flexible water-stopping member is a structure in which anchoring portions 2b at both ends of a flexible water-stopping member 2, which is flexible and has a bulge portion 2a in the middle portion, are placed between connecting portions 1a that intersect with the central axis direction X of a pair of connected bodies 1 to be connected, and the flexible water-stopping member 2 is clamped between a pressing member 3 and the connecting portions 1a and tightened with a fastening member 4, and is configured with a receiving member 5 attached to the pressing member 3 on the tip side of operation by a tightening tool T of the fastening member 4 on the bulge portion 2a side, and consisting of a spacer portion 5a having a thickness greater than the height of the space S and a receiving plate portion 5b attached to the spacer portion 5a and receiving the bulge of the bulge portion 2a. With this configuration, even when the bulging portion 2a expands when the flexible water-stopping member 2 is fastened and fixed with the fastening member 4, the receiving plate portion 5b of the receiving member 5 provided on the pressing member 3 prevents contact or interference with the fastening member 4, and the spacer portion 5a forms a space S inside the receiving plate portion 5b that is open to the side operated by the fastening tool T. As a result, even after the anchoring portion 2b of the flexible water-stopping member 2 has been fastened and attached with a predetermined torque, the fastening torque can be managed and adjusted with the fastening tool T. Furthermore, the receiving plate portion 5b of the receiving member 5 can prevent damage to the flexible water-stopping member 2 due to contact with the fastening member 4 or the like.

[0029] The connectable body 1 is hollow, and the flexible water-stopping member 2 is short and tubular. With this configuration, the flexible water-stopping member 2 can be attached midway through the connected body 1, such as a hollow pipeline, and even after the anchoring portion 2b of the flexible water-stopping member 2 is tightened and attached with a predetermined torque, space S can be secured and the tightening torque can be managed and adjusted with the tightening tool T. Furthermore, the receiving plate portion 5b of the receiving member 5 can prevent damage to the flexible water-stopping member 2 due to contact with the fastening member 4 or the like.

[0030] The receiving member is configured by dividing a spacer portion 5a and a receiving plate portion 5b into a plurality of portions along the connecting portion 1a. According to this configuration, the receiving member 5 can be attached in multiple steps, improving the workability of the attachment.

[0031] The receiving member 5 is configured so that the spacer portion 5a and the receiving plate portion 5b have enough rigidity to withstand the load caused by the bulging portion 2a. With this configuration, the receiving member 5 can reliably receive the load from the bulging portion 2a, and even after the space S is secured and the anchoring portion 2b of the flexible water-stopping member 2 is tightened and attached with a predetermined torque, the tightening torque can be managed and adjusted with the tightening tool T. Furthermore, the receiving plate portion 5b of the receiving member 5 can prevent damage to the flexible water-stopping member 2 due to contact with the fastening member 4 or the like.

[0032] The receiving member 5 is configured such that the spacer portion 5a and the pressing member 3 are integrally formed. According to this configuration, the structure of the receiving member 5 can be simplified.

[0033] The receiving member 5 is configured by attaching the spacer portion 5a to the pressing member 3 by adhesive, screws, or welding. According to this configuration, the spacer portion 5a can be attached to the pressing member 3 reliably.

[0034] The receiving member 5 is configured by attaching the receiving plate portion 5b to the spacer portion 5a by adhesive, screws, welding, or a fitting structure. According to this configuration, the receiving plate portion 5b can be reliably attached to the spacer portion 5a.

[0035] In the above embodiment, an example has been described in which the flexible water-stopping member 2 is constructed independently like the flexible segment 1b and connected to the middle of the shield segment 1c (pipeline), but this is not limited to this, and the flexible water-stopping member 2 may also be installed directly in the pipeline. Furthermore, the object to be connected 1 may be a flat body such as an adjacent wall surface, as already mentioned. The present invention is not limited to the above-described embodiment, and modifications can be made without departing from the spirit of the invention. [Explanation of symbols]

[0036] 100 Flexible water-stopping member mounting structure (mounting structure) 1 Connected object 1a Connection 1b Flexible segment 1c Shield segment 1d Frame member 2 Flexible water-stopping member 2a Bulge 2b Anchoring section 2c Bolt holes 3 Presser member 3a head 3b Vertical section 3c horizontal part 4 Fastening members 4a Bolt 4b Nut 5 Receiving member 5a Spacer part 5b Receiving plate 5c Mounting part 5d Mating groove 5e Mating protrusion 6a Fixing bolt 6b Fixing bolt 7a Fixing bolt S space (tightening space) T tightening tool X center axis direction Y radial direction

Claims

1. An attachment structure for a flexible water-stopping member, in which anchoring portions at both ends of the flexible water-stopping member, which is flexible and has a bulge in the middle, are placed between connecting portions that intersect with the central axis direction of a pair of connected bodies to be connected, and the flexible water-stopping member is clamped between a pressing member and the connecting portions and fastened with a fastening member, a spacer portion attached to the pressing member on the bulging portion side at the tip end side of the operation tip of the fastening member by a fastening tool, the spacer portion having a thickness equal to or greater than the height of the fastening space; a receiving plate portion attached to the spacer portion to receive the bulge of the bulging portion, The receiving plate portion extends from the spacer portion to a position overlapping the fastening member as viewed from the central axis direction, and forms the fastening space between the receiving plate portion and the pressing member, the fastening space being open to an operation side of the fastening tool. A mounting structure for a flexible water-stopping member, comprising:

2. The connected body is hollow, The flexible water-stopping member is configured to have a short cylindrical shape.

2. The mounting structure for a flexible water-stopping member according to claim 1.

3. The receiving member is configured such that the spacer portion and the receiving plate portion are divided into a plurality of portions along the connecting portion.

3. The mounting structure for a flexible water-stopping member according to claim 1 or 2.

4. The receiving member is configured such that the spacer portion and the receiving plate portion have rigidity sufficient to withstand the load caused by the bulging portion.

4. The mounting structure for a flexible water-stopping member according to claim 1.

5. The receiving member is configured such that the spacer portion and the pressing member are integrally formed.

5. The mounting structure for a flexible water-stopping member according to claim 1.

6. The receiving member is configured such that the spacer portion is attached to the pressing member by adhesive, screws, or welding.

5. The mounting structure for a flexible water-stopping member according to claim 1.

7. The receiving member is configured such that the receiving plate portion is attached to the spacer portion by any one of adhesive, screws, welding, and a fitting structure.

5. The mounting structure for a flexible water-stopping member according to claim 1.

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