Junction structure of flexible water cutoff joint and repairing method

Abstract

To provide a junction structure of a flexible water cutoff joint where a joined part can be easily joined in a short time, and a damaged part can be easily replaced and repaired, and a repairing method.SOLUTION: A junction structure 100 of a flexible water cutoff joint including an expansion part 11 and fixing protruded stripe parts 13 in both edge parts of the expansion part 11 is a junction structure of a flexible water cutoff joint 10, where the fixing protruded stripe parts 13 step over a joint part 2 of a structure 1 and are fixed in a pressed manner by fixing members 20. The flexible water cutoff joint 10 includes water cutoff stripe parts 14 that are ejected on a side of the structure 1 in the fixing protruded stripe parts 13, are positioned in outside end parts 13a, and are pressed, thereby cutting off water. A joined part A of the flexible water cutoff joint 10 where the structures butt against each other includes a water cutoff sheet member 30 that steps over the joined part A and covers a front side surface 10a of the flexible water cutoff joint 10 and through to outside surfaces 13b of the fixing protruded stripe parts 13. The outside surfaces 13b of the water cutoff stripe parts 14 that are pressed against surfaces 1a of the structures 1 are covered through to the surfaces 1a of the structures 1 with the water cutoff sheet member 30, thereby cutting off water in a gap of the joined part A.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a joint structure and a repair method for a flexible water stop joint. [Background technology]

[0002] The joints of structures such as concrete structures and shielded pipelines must not only be waterproof both inside and outside, but also allow for uneven settlement of the structures on both sides, displacement during earthquakes, and expansion and contraction of the wall parts due to temperature changes, etc., so flexible watertight joints made of rubber, synthetic resin, etc. are installed between the structures spanning the joints.

[0003] The flexible water stop joint is formed to a length corresponding to the perimeter of the joint, and after being transported to the construction site, the ends are vulcanized to form a ring. For example, a method has been disclosed for fixing the flexible water stop joint to the joint, in which fixing ridges are formed at both end edges without forming bolt holes in the flexible water stop joint, and only the pressing plate is fastened to the anchor bolt, and the fixing ridges are fitted into the recessed grooves of the pressing plate and fastened to fix the flexible water stop joint (see Patent Document 1). When part of a flexible water stop joint is damaged and it is to be repaired, it is necessary to cut it on both sides including the damaged part, prepare a new repair flexible water stop joint of a length corresponding to the cut part, and join both ends of the new joint to the existing flexible water stop joint at the cut part. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-179718 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, flexible watertight joints are joined by vulcanization, which requires joining at two points on-site using a joining mold. This takes a long time due to the need to process the ends of the cut parts and heat the joining mold, and it is not easy to repair. Therefore, there is a need to develop a technology that can quickly and easily join joints and easily replace and repair damaged parts.

[0006] The present invention has been made in consideration of such conventional technology, and aims to provide a joining structure and repair method for a flexible water-stopping joint that allows joints to be joined easily in a short amount of time and that allows damaged parts to be easily replaced and repaired. [Means for solving the problem]

[0007] In order to achieve the above object, a joining structure of a flexible water stop joint according to a first aspect of the present invention comprises: A joint structure of a flexible water stop joint comprising an expansion section and fixing ridges at both end edges of the expansion section, the fixing ridges being pressed and fixed by a fixing member across a joint of a structure, The flexible watertight joint is provided with a watertight line portion that protrudes toward the structure from the fixing protrusion portion and is located at an outer end portion thereof and is pressed to stop water from flowing. The joint of the flexible watertight joints that are butted against each other has a watertight sheet member that spans the joint and covers the front surface of the flexible watertight joint and the outer surface of the fixing convex stripe portion, and the outer surface of the watertight stripe portion pressed against the surface of the structure is covered by the watertight sheet member up to the surface of the structure to stop water flow between the joints. It is characterized by:

[0008] The joining structure of a flexible water stop joint according to a second aspect of the present invention comprises: A joint structure of a flexible water stop joint comprising an expansion section and fixing ridges at both end edges of the expansion section, the fixing ridges being pressed and fixed by a fixing member across a joint of a structure, The flexible water stop joint includes a water stop joint member divided into a plurality of parts along the joint portion, and a water stop line portion that protrudes toward the structure from the fixing convex portion of the water stop joint member and is located at an outer end portion thereof and is pressed to stop water; The joint of the waterproof joint members that are butted against each other has a waterproof sheet member that spans the joint and covers the front surface of the waterproof joint member and the outer surface of the fixing convex stripe portion, and the outer surface of the waterstop stripe portion pressed against the surface of the structure is covered by the waterproof sheet member up to the surface of the structure to stop water flow between the joint members. It is characterized by:

[0009] The waterstop sheet member preferably comprises a naturally vulcanizing sheet material that is in contact with and vulcanized bonded to the surface of the flexible waterstop joint.

[0010] The fixing member includes a fastening portion that is fastened to the structure, and a groove portion that extends from one end of the fastening portion and is attached to the fixing protrusion portion, It is preferable that the groove portion has a pressing portion that covers the outer surface of the fixing ridge portion and presses against the water-stop sheet member, and is formed integrally with or separately from the fixing member.

[0011] The fixing member includes a fastening portion that is fastened to the structure, and a groove portion that extends from one end of the fastening portion and is attached to the fixing protrusion portion, It is preferable that the fixing ridge portion is formed to have a width smaller than the groove width of the recessed groove portion.

[0012] It is preferable that the fixing ridge portion is formed so as to have a height larger than the width of the recessed groove portion by a volume corresponding to the width being smaller than the groove width of the recessed groove portion.

[0013] It is preferable that the fixing ridge portion at the joint portion is formed to have a width that is twice the thickness of the waterstop sheet member and smaller than the groove width of the recessed groove portion.

[0014] It is preferable that the fixing convex stripe portion at the joint is formed to have a width smaller than the groove width of the concave groove portion by twice the thickness of the waterstop sheet member without interfering with the waterstop line portion.

[0015] A method for repairing a flexible water stop joint according to a third aspect of the present invention comprises: A process of removing a water stop joint member having at least a damaged portion of a joint structure of a flexible water stop joint between the joint portions by removing a fixing member; A step of installing a repair waterstop joint member in the joint portion from which the waterstop joint member having the damaged portion was removed; A step of covering the joint between the existing waterstop joint member and the repair waterstop joint member with a waterstop sheet member up to the front surface of the waterstop joint member and the outer surface of the fixing protrusion portion; a step of fastening the fixing convex stripe portion covered with the waterstop sheet member with the fixing member and pressing the waterstop line portion to cover and fix the outer surface of the waterstop line portion with the waterstop sheet member up to the surface of the structure, thereby repairing the joint portion with the waterstop joint member for repair; It is characterized by: Effect of the Invention

[0016] According to the present invention, joints can be easily joined in a short time, and damaged parts can be easily replaced and repaired. [Brief description of the drawings]

[0017] [Figure 1] 1A and 1B show an embodiment of a joint structure for a flexible water stop joint according to the present invention, in which FIG. [Diagram 2] 1 is a front view of a flexible water stop joint according to an embodiment of the present invention, shown in an expanded state. [Diagram 3] 1A is a partial cross-sectional view showing a state before tightening, FIG. 1B is a state after tightening, and FIG. 1C is a partial cross-sectional view showing a conventional example before tightening, according to one embodiment of the present invention. [Figure 4]1A is a partial cross-sectional view showing a state before fastening, and FIG. 1B is a partial cross-sectional view showing a fastened state, relating to an intermediate portion of an embodiment of the present invention. [Diagram 5] 1A is a partial cross-sectional view showing a joint according to an embodiment of the present invention in a state before fastening, and FIG. 1B is a partial cross-sectional view showing a fastened state. [Figure 6] FIG. 1A is a front view and a cross-sectional view of the middle part, FIG. 1B is a front view and a cross-sectional view of the joint part where the inside is machined, and FIG. 1C is a front view and a cross-sectional view of the joint part where the outside is machined, according to one embodiment of the present invention. [Figure 7] FIG. 1A is a partial cross-sectional view illustrating a fixing member having an integrated pressure portion and a fixing ridge portion before and after tightening, FIG. 1B is a partial cross-sectional view illustrating a fixing member having a separate pressure portion and a fixing ridge portion before and after tightening, and FIG. 1C is a partial cross-sectional view illustrating another fixing member having a separate pressure portion and a fixing ridge portion before and after tightening. [Figure 8] 1A to 1D are front views showing an expanded view of each step of a repair method for a flexible water stop joint according to one embodiment of the present invention. [Figure 9] FIG. 1A is a schematic perspective view of a 90-degree corner joint member in a joined state, and FIG. 1B is a schematic perspective view of an exploded state, according to one embodiment of the present invention. [Figure 10] FIG. 1A is a schematic perspective view of a 135-degree corner joint member in a joined state, and FIG. 1B is a schematic perspective view of an exploded state, according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. As shown in Figure 1, the joint structure 100 of a flexible water-stop joint is applied to a flexible water-stop joint 10 which has an expansion section 11 and fixing ridge sections 13 protruding from both end edges 12 of the expansion section 11 to the front side (the side opposite the structure 1), and in which the fixing ridge sections 13 are pressed and fixed by a fixing member 20 across the joint section 2 of the structure 1.

[0019] The flexible watertight joint 10 has a watertight line portion 14 that protrudes from the fixing protrusion portion 13 toward the structure 1 and is located at the outer end portion 13a and is pressed to stop water (see Figs. 1(a) and 3(a)). The joint A of the flexible waterstop joint 10, which is butted against each other, has a waterstop sheet member 30 that spans the joint A and covers the front surface 10a of the flexible waterstop joint 10 and the outer surface 13b of the fixing convex stripe portion 13, and the waterstop sheet member 30 covers the outer surface 14a of the waterstop stripe portion 14 pressed against the surface 1a of the structure 1 up to the surface 1a of the structure 1, thereby sealing off water between the joint A (see Figures 1 and 2). In other words, in the joining structure 100 of this flexible waterstop joint, unlike vulcanization joining or adhesive joining which joins the end faces of joint A of the previous flexible waterstop joint 10 together without creating an interface as with other parts, the interface is left intact (the end faces are butted together) and the front surface of joint A is covered with a waterstop sheet member 30, and the back side of joint A is pressed against the waterstop stripes 14 located at the outer ends 13a of both end edges 12, thereby making the waterstop state continuous on both sides and joining so that the periphery of the interface can be watertight (see Figure 5(b)).

[0020] The flexible watertight joint 10 is formed into a single piece with a constant cross-sectional shape corresponding to the peripheral length of the joint portion 2 of the structure 1, and may be made into a ring shape by joining one of both ends as joint A, or may be made into a ring shape by joining a watertight joint member 10A divided into multiple pieces in the peripheral length direction of the joint portion 2 at joint A places equal to the number of divisions + 1, as shown in Figure 2. In the following embodiment, the flexible waterstop joint 10 is described as being composed of multiple divided waterstop joint members 10A and joined at the number of divisions + 1. If the multiple divided waterstop joint members 10A are damaged, they can be easily repaired by replacing only the damaged waterstop joint member 10A1 and joining both ends.

[0021] As shown in Figure 1(a), the multiple divided watertight joint members 10A of the flexible watertight joint 10 have an expansion section 11 that allows displacement, and a fixing ridge portion 13 provided on the front side (opposite the structure 1) of anchoring portions (both end edges) 12 extended from both ends of the expansion section 11, and the fixing ridge portion 13 provided on the anchoring portion 12 is fixed by a fixing member 20.

[0022] The waterstop joint member 10A is made of an elastic material such as rubber or synthetic resin, and for example, one or more layers of reinforcing cloth are layered on the inside depending on the required strength. In addition, the waterstop joint member 10A may be used by being installed so as to cover the outside of the waterstop joint member 10A and the waterstop sheet member 30 when constructing the flexible waterstop joint 10, without the reinforcing cloth layered on the inside.

[0023] The expansion section 11 that allows the displacement may have a cross-sectional shape that is approximately U-shaped and is configured to surround both sides of the joint section 2 at the opening side, as shown in FIG. 1(a), or may have a cross-sectional shape that is approximately Ω-shaped as a circular arc, or may have a cross-sectional shape that snakes in an approximately W-shape by connecting multiple circular arcs. The cross-sectional shape of the expansion section 11 is not limited in any way as long as it can allow for uneven settlement of the structure 1, displacement during an earthquake, and displacement due to temperature change, etc. The anchoring section 12 that is extended from the expansion section 11 may be a flat strip that can be installed on the surface of the structure 1, and the shape, etc., of the expansion section 11 is not particularly limited, as is the case with the expansion section 11.

[0024] The fixing protrusion 13 is integrally formed so as to protrude to the front side (outside the surface 1a of the structure 1) of the anchoring portion 12, as shown in, for example, Figures 1(a), 4(a), and 5(a), and is formed so as to protrude, for example, with a rectangular cross-sectional shape. The shape of the fixing convex strip portion 13 is not limited to a rectangular cross-sectional shape, and although not shown in the figure, as long as the outer surface 13b is a plane that is approximately perpendicular to the surface 1a of the structure 1, the shape of the other parts is not limited in any way, and it is sufficient that the shape can be pressed against the surface 1a of the structure 1 from the front side by the concave groove portion 21 of the fixing member 20 described later.

[0025] The waterstop joint member 10A has waterstopping lines 14 on the back surface of the anchoring portion 12 (see Figs. 1(a), 3(a), 4(a), and 5(a)). The waterstopping lines 14 are formed on the surface facing the structure 1, which is the back surface of the fixing ridge 13, protruding towards the structure 1. For example, two waterstopping lines 14 are integrally formed over the entire length of the back surface of one of the fixing ridges 13, each protruding in a semicircular shape. One of the two water-stopping line portions 14 is arranged at the outer end portion 13a in the width direction of the joint portion 2 on the back surface of the fixing ridge portion 13, and is arranged so that when pressed and crushed against the surface 1a of the structure 1, there is no gap at the corner between the back surface of the fixing ridge portion 13 and the outer surface 14a of the water-stopping line portion 14 (see Figures 3(b), 4(b), and 5(b)).

[0026] By doing so, between the waterstop joint member 10A and the surface 1a of the structure 1, the waterstop lines 14 located on the outside of the fixing ridges 13 on both sides sandwiching the joint portion 2 ensure a watertight state outside these two outer waterstop lines 14 (see part X in Figure 3(b)) because the plane of the anchoring portion 12 or a plane with low surface pressure is not formed. It has been confirmed by individual experiments that the waterstop lines 14 can increase the surface pressure to ensure a watertight state, and that the waterstop lines 14 located on the outside of the back surface of the fixing ridges 13 ensure a watertight state without water leakage outside these. In addition, the cross-sectional shape of the water-stopping line portion 14 is not limited to being hemispherical, and may be other shapes such as trapezoidal or rectangular, as long as it is possible to increase the surface pressure when tightened by the fixing member 20 and ensure a sealed state between the surface 1a of the structure 1.

[0027] The fixing member 20 is formed from a metal plate, and as shown in FIG. 1(a), has a groove portion 21 formed at one end, a fastening portion 22 at the middle portion, and a support portion 23 at the other end. The fixing member 20 fixes the middle portion of the waterstop joint member 10A and the joint portion A of the waterstop joint member 10A across the middle portion (see FIG. 2 and FIG. 6). The fixing member 20 is formed with a width that allows one waterstop joint member 10A to be fixed at multiple points at a predetermined interval. The fixing member 20 is fixed by tightening, for example, seven points between the joint portions A at both ends at a constant interval. The width of the fixing member 20 and the tightening interval are set according to the length of the waterstop joint member 10A and the required pressing force, and are set so as to maintain the waterstop state. In addition, at joint A of the watertight joint member 10A, the width, etc. of the fixing member 20 is set so that it can straddle joint A and simultaneously press and fix the watertight joint members 10A on both sides, and the specifications are the same regardless of the location of use of the intermediate portion or joint A. The fixing member 20 may have different specifications, such as width, between the intermediate portion and the joint portion A.

[0028] The fixing member 20 is fixed by fitting a groove portion 21 provided at one end onto the fixing convex portion 13 of the waterstop joint member 10A from the outside, tightening the fastening portion 22 in the middle to the structure 1 with an anchor bolt 3, and contacting the support portion 23 at the other end with the surface 1a of the structure 1 to form a tightening space between the support portion 23 and the surface 1a of the structure 1, thereby bending and tightening the tightening space to narrow the tightening space (see Figures 1(a), 4(a)(b), and 5(a)(b)).

[0029] The fixing member 20 is formed with, for example, a rectangular groove so that the groove portion 21 at one end can be fitted over the fixing ridge portion 13 of the waterstop joint member 10A. The width b of the fixing ridge portion 13 and the groove width B of the groove portion 21 are set so that the groove portion 21 can be smoothly attached and detached. For example, the width b of the fixing ridge portion 13 is made smaller than the groove width B of the groove portion 21 of the fixing member 20, while the height of the fixing ridge portion 13 is made higher by h by the amount of the reduced width b, so that the fixing ridge portion 13 is filled in the groove portion 21 and comes into close contact with it in the tightened state (see FIG. 4(a)).

[0030] In addition, as shown in Fig. 5(a)(b), in the joint A of the waterstop joint member 10A, the waterstop sheet member 30 is placed on the front surface 1a, so the width b of the fixing convex stripe 13 is set to width b1, which is twice the thickness of the waterstop sheet member 30. When the width b of the fixing convex stripe 13 is set to be small to b1 in consideration of the thickness of the waterstop sheet member 30, it is necessary to avoid cutting down the outside due to interference with the waterstop line stripe 14 protruding from the outer end portion 13a of the back surface (see Fig. 6(c)). When cutting down the fixing convex stripe 13 in consideration of the thickness of the waterstop sheet member 30, it is most preferable to cut down only the inside of the fixing convex stripe 13 (see Fig. 6(b)). When cutting down only the outside, there is a risk of interference with the waterstop line stripe 14 (see Fig. 6(c)), and when tightened, the waterstop line stripe 14 is deformed so as to escape to the outside, making it impossible to secure the surface pressure and stop water. It is also possible to cut the inside and outside separately, but this is not preferable as it requires two processing steps. When using fixing members 20 of the same specifications in the intermediate portion and in the joint portion A, the position of the fixing member 20 will shift depending on how the fixing ridge portion 13 is cut (see Figure 6). However, this can be dealt with by making the mounting hole for the anchor bolt 3 in the fastening portion 22 a long hole or the like.

[0031] The fastening portion 22 in the middle of the fixing member 20 is formed approximately parallel to the surface of the structure 1, and a groove side portion 21a of the recessed groove portion 21 is extended approximately vertically from one end portion. A support portion 23 is extended and formed obliquely from the other end portion of the fastening portion 22, and its tip portion is adapted to abut against the surface of the structure 1. The fixing member 20 has its groove portion 21 placed over the fixing ridge portion 13 of the watertight joint member 10A, and its intermediate fastening portion 22 attached to the anchor bolt 3 with its support portion 23 abutting against the surface 1a of the structure 1. When this is done, the space formed between the fastening portion 22 and the surface 1a of the structure 1 becomes a tightening space capable of deflecting the fixing member 20 (see Figure 1(a)). In addition, when the fastening of the fixing member 20 is completed, the fastening space may disappear, and the groove side portion 21a of the concave groove portion 21 may be close to the surface 1a of the structure 1.

[0032] In the fixing member 20, the length of the groove side portion 21a (outer groove depth) is set so that the groove side portion 21a of the concave groove portion 21 presses the waterstop sheet member 30 covering the fixing ridge portion 13 so as to be in close contact with the fixing ridge portion 13 at the joint portion A of the waterstop joint member 10A. That is, the groove side portion 21a of the concave groove portion 21 is formed longer than the inner side in accordance with the length of the outer surface 13b of the fixing ridge portion 13 (see FIG. 7(a)).

[0033] The fixing member 20 does not need to have the groove side portion 21a of the groove portion 21 long to fix the portion other than the joint portion A of the water stop joint member 10A, and if the same specifications are used, it will be an excessive function and many metal plates will be required. Therefore, for the joint portion A, a pressing portion 24 can be provided as a separate body on the inside of the groove portion 21. As shown in Figs. 7(b) and (c), the pressing portion 24 is a flat metal plate that is abutted against the outer surface 13b of the fixing ridge portion 13, or an L-shaped pressing portion that is abutted against the top surface 13c and the outer surface 13b. In this case, the dimensions of the pressing portion 24 are set so that it contacts the surface 1a of the structure 1 when the water stop line portion 14 of the fixing ridge portion 13 is crushed and the fixing ridge portion 13 is pressed and deformed to fill the groove portion 21. The pressing portion 24 can be fixed to the inside of the groove of the concave groove portion 21 by welding or adhesive, or a separate piece can be placed against the outer surface 13b of the fixing ridge portion 13 covered with the waterstop sheet member 30 when joining the waterstop joint member 10A.

[0034] The waterstop sheet member 30 is a sheet member that achieves watertightness by spanning the joint A between the mated waterstop joint members 10A and covering the front surface 10a and the outer surface 13b of the fixing ridge 13 of the waterstop joint member 10A (see Fig. 1(a) and Fig. 2). The waterstop sheet member 30 is attached so that, with the waterstop lines 14 at both ends of the waterstop joint member 10A pressed against the surface 1a of the structure 1, both ends of the waterstop sheet member 30 are in contact with the surface 1a of the structure 1, and cover from the outer surface 13b of one fixing ridge 13 to the front surface 10a of the waterstop joint member 10A and the surface of the fixing ridge 13 to the outer surface 13b of the other fixing ridge 13.

[0035] The waterstop sheet member 30 is constructed by laminating, for example, a vulcanized rubber sheet on the front surface and an unvulcanized naturally vulcanized rubber sheet on the back surface. The unvulcanized naturally vulcanized rubber sheet can be bonded by rolling the front surface 10a of the waterstop joint member 10A and the surface of the fixing ridge 13 so as to cover from the outer surface 13b of one fixing ridge 13 to the outer surface 13b of the other fixing ridge 13. After bonding, the surface temperature of the waterstop sheet member 30 increases, so that the vulcanization of the naturally vulcanized rubber sheet progresses, resulting in a strong bond. In addition, the naturally vulcanized rubber sheet can be reinforced by the vulcanized rubber sheet on the front surface. Although it depends on the requirements for the joint strength of joint A, experiments have confirmed that the joint strength is comparable to that of previous vulcanization joints.

[0036] By providing the waterproof sheet member 30, waterproofing is achieved without joining the butted end faces of the joint parts A of the waterproof joint members 10A that are butted against each other. When the butted end faces of the joint A of the waterstop joint members 10A are not joined, the space between the end faces becomes a water channel, and moisture that seeps in through the joint 2 leaks out from the water channel between the end faces. In this flexible waterstop joint joint structure 100, the front surface 1a of the structure 1, which is the joint 2 side, is watertight, with no water leaking outside due to the waterstop stripes 14 at the outer end 13a on the back surface of the fixing ridge 13 (see part X in FIG. 3(b)). Furthermore, inside the waterstopping stripe portion 14 of the outer end portion 13a on the back surface of the fixing ridge portion 13, the space between the end faces becomes a water channel and leaks out to the outside (see part Y in Figure 3(b)), but since the outside between the end faces, i.e., from the outer surface 13b of one fixing ridge portion 13 to the outer surface 13b of the other fixing ridge portion 13, is covered with the waterstopping sheet member 30, this front side (outside) can be made waterproof (see part Z in Figure 3(b)).

[0037] In such a joint structure 100 of a flexible waterstop joint, a waterstop state can be achieved by covering the outside of joint A of the waterstop joint member 10A with a waterstop sheet member 30 with both ends abutting against the surface 1a of the structure 1. The inside of the joint A is configured to close the corners of the outer end 13a of the fixing convex portion 13 on the end face of the joint A with the waterstop line portion 14 pressed against the surface 1a of the structure 1. The waterstop state can be achieved by combining the waterstop structures inside and outside the joint A of these waterstop joint members 10A. Therefore, the position of the waterstop line 14 provided on the outer end 13a of the fixing ridge 13 greatly affects whether or not the waterstop state is maintained. If the waterstop line 14 is formed on the joint 2 side (see Figure 1) and there is a flat portion or a portion with low surface pressure between the waterstop line 14 and the fixing ridge 13, water leakage will occur through this flat portion or portion with low surface pressure (see Figure 3(c)). However, with the flexible waterstop joint structure 100, such a state can be avoided and the waterstop state can be maintained (see Figure 3(b)).

[0038] When the position of the waterstop line portion 14 is inside the outer end portion 13a of the fixing ridge portion 13 and a flat surface with low surface pressure is formed, as shown in Fig. 3(c), in order to stop water from entering this flat portion with a waterstop sheet member 30, it is necessary to attach the waterstop sheet member 30 so that it wraps around to the back side of the fixing ridge portion 13, i.e., the back side of the anchor portion 12. This makes it impossible to join joint portion A by joining only the front side of the waterstop joint member 10A.

[0039] Next, the construction of such a flexible water-stop joint joint structure 100 differs from the conventional flexible water-stop joint 10 in that the joints at both ends of a single flexible water-stop joint 10 molded to match the peripheral length of the joint portion 2 are first joined into a ring shape using a vulcanizing joining mold, and then the joint is attached to the joint portion 2, as in the case of the previous flexible water-stop joint 10. In constructing the flexible water stop joint connection structure 100, first, one of the divided water stop joint members 10A is attached to a predetermined position by the fixing member 20 so as to straddle the joint portion 2. Thereafter, the joint A of the next waterstop joint member 10A is butted against the fixed waterstop joint member 10A, and the joints A are joined and attached using the already-described joining structure 100. That is, the joints A of the waterstop joint members 10A are covered with the waterstop sheet member 30 so as to straddle them, and then the fixing member 20 is placed thereon, and then the two are fastened and fixed. Such a waterstop joint member 10A is fixed, and the joints A are covered and joined with the waterstop sheet member 30, and this process is repeated until the last waterstop joint member 10A is attached so that the joints A at both ends are butted together and fixed with the fixing member 20, and after the two joints A at both ends are covered with the waterstop sheet member 30, the fixing member 20 is placed over it and tightened to fix it. The waterstop joint member 10A divided in this way is joined at the number of joints A (the number of divisions + 1) to form a ring, and construction as a continuous flexible waterstop joint 10 is completed.

[0040] According to the flexible waterstop joint connection structure 100 constructed in this manner, it is only necessary to fix the divided short and light waterstop joint components 10A, which makes it easy to transport to the site, and the construction can be completed by attaching only from the front side, allowing the jointing to be completed in a short time. Furthermore, since the width b of the fixing ridge portion 13 of the watertight joint member 10A is smaller than the groove width B of the concave groove portion 21 of the fixing member 20, the concave groove portion 21 of the fixing member 20 can be attached so as to cover the fixing ridge portion 13 without applying a large force, and fixing can be achieved efficiently and in a short time.

[0041] In the flexible watertight joint joining structure 100, when the watertight joint member 10A is to be attached to a right-angle corner portion or a corner portion with a changed angle of the structure 1, a corner joint member 10B (see Figure 9) pre-formed at 90 degrees or a corner joint member 10C (see Figure 10) pre-formed at 135 degrees can be prepared and combined with the straight watertight joint member 10A, so that the corner joint members 10B, 10C can be fixed and joined to the corner portion more easily to achieve a watertight state.

[0042] Next, an embodiment of the method for repairing a flexible water stop joint of the present invention will be described with reference to Figs. Such a method for repairing a flexible water stop joint can be applied to a water stop joint member 10A attached using the already-described flexible water stop joint joint structure 100, as shown in Fig. 2. In this method for repairing a flexible water stop joint, the water stop joint member 10A1 on which the damaged portion 10b has been formed and which has been divided and attached at the joints A at both ends is replaced with a repair water stop joint member 10A2 for repair.

[0043] 1) Removal of the damaged part In order to remove the watertight joint member 10A1 in which the damaged portion 10b has been formed, the fixing member 20 in the middle portion that has fixed the watertight joint member 10A1 is removed, and the fixing members 20 at two locations at the joint portion A are also removed. After this, the watertight sheet members 30 that have been covering the two joint portions A are each peeled off (see FIG. 8(a)). The surface 1a of the structure 1 from which the damaged water stop joint member 10A1 has been removed is cleaned in preparation for the installation of the repair water stop joint member 10A2.

[0044] 2) Replacement with repair water-stop joint parts A waterproof joint member 10A2 for repair, which has been prepared in advance, is installed at the joint portion 2 of the removed structure 1 at the portion of the waterproof joint member 10A1 (see FIG. 8(b)). In addition, when installing the repair water stop joint member 10A2, although not shown in the drawings, the middle part is fixed with a fixing member 20. In this way, the repair water stop joint member 10A2 can be easily held in place even when replacing the ceiling part or side wall part of the structure 1.

[0045] 3) Joining The joints A at both ends of the repair waterstop joint member 10A2 are joined by attaching the waterstop sheet member 30 so as to straddle the joints A (see FIG. 8(c)). The waterstop sheet member 30 is attached so as to cover the waterstop joint member 10A from the outer surface 13b of one fixing ridge portion 13 to the outer surface 13b of the other, with both ends in contact with the surface 1a of the structure 1. The waterstop sheet member 30 has an inner surface made of an adhesive natural vulcanized rubber sheet, so it can be attached by rolling it down.

[0046] 4) Fix it and repair is complete After the concave grooves 21 are fitted over the fixing ridges 13 from the outside of the waterstop sheet members 30 at the joints A on both ends of the repair waterstop joint member 10A2, the fixing members 20 are tightened and fixed. By fixing the middle portion and the joint portion A of the repair waterstop joint member 10A2 with the fixing member 20 in this manner, the waterstop joint member 10A1 in which the damaged portion 10b has been formed can be replaced with a new repair waterstop joint member 10A2 and repaired.

[0047] According to this method of repairing a flexible waterstop joint, after replacing the damaged waterstop joint part 10A1 with a repair waterstop joint part 10A2, the waterstop sheet part 30 can be covered and joined to the outside of the joint A, which significantly reduces the work time compared to vulcanization joining using a joining mold, and allows the repair to be completed in, for example, about one hour. In contrast, conventional repair methods require cutting and removing both sides of the damaged area, which takes more than twice as long just to remove and replace. In addition, because vulcanization bonding is required, a wide area of ​​the flexible watertight joint, including the sound part, must be removed so that it can be attached to the bonding mold, and the end processing required for bonding the flexible watertight joint, as well as the preheating time and bonding time for vulcanization bonding, take more than 10 times longer. Therefore, if there is a restriction that repairs can only be done at night, for example, more than four hours will be required, making it impossible to do the repairs only at night.

[0048] As specifically described above in conjunction with the embodiment, the joint structure 100 of the flexible water-stopping member of the present invention provides a flexible water-stopping joint 10 which comprises an expansion section 11 and fixing convex stripes 13 at both end edges of the expansion section 11, and the fixing convex stripes 13 are pressed and fixed by a fixing member 20 across the joint section 2 of the structure 1, and the flexible water-stopping joint 10 comprises a water-stopping line portion 14 which protrudes from the fixing convex stripe 13 toward the structure 1 and is located at the outer end portion 13a and is pressed to stop water, and the joint A of the flexible water-stopping joint 10 which are butted against each other has a water-stopping sheet member 30 which covers the front surface 10a of the flexible water-stopping joint 10 and the outer surface 13b of the fixing convex stripe 13 across the joint A, and the outer surface 13b of the water-stopping line portion 14 which is pressed against the surface 1a of the structure 1 is covered by the water-stopping sheet member 30 up to the surface 1a of the structure 1 to stop water between the joint A. According to this configuration, the front surface 10a of the joint A of the flexible waterstop joint 10 is covered with the waterstop sheet member 30 and bonded while the end faces of the flexible waterstop joint 10 are butted together, and the back side of the joint A is pressed against the waterstop stripes 14 located at the outer ends 13a of both end edges 12, thereby making it possible to join the joint while keeping the waterstop state continuous on the front and back and sealing the periphery of the interface. This allows the joint A to be joined easily in a short time compared to the conventional case of vulcanization joining using a joining mold. Also, joining can be easily achieved by simply covering the front side of the flexible waterstop joint 10 with the waterstop sheet member 30.

[0049] According to the joint structure 100 of the flexible water-stopping member, the flexible water-stopping joint 10 includes an expandable portion 11 and fixing ridges 13 at both end edges of the expandable portion 11, and the fixing ridges 13 are pressed and fixed by a fixing member 20 across the joint 2 of the structure 1. The flexible water-stopping joint 10 includes a water-stopping joint member 10A divided into a plurality of parts along the joint 2, and a fixing ridge 13 of the water-stopping joint member 10A located at an outer end 13a protruding toward the structure 1. The joint A of the waterstopping joint member 10A, which are butted against each other, has a waterstopping sheet member 30 that spans the joint A and covers the front surface 10a of the waterstopping joint member 10A and the outer surface 13b of the fixing protrusion portion 13, and the waterstopping sheet member 30 covers the outer surface 14a of the waterstopping line portion 14 pressed against the surface 1a of the structure 1 up to the surface 1a of the structure 1, thereby sealing off water between the joint A. According to this configuration, the front surface 10a of the joint A of the waterstop joint members 10A is covered with the waterstop sheet member 30 while the end faces are butted together, and the back side of the joint A is pressed against the waterstop stripe portion 14 located at the outer end portion 13a of both end edges 12, so that the waterstop state is continuous on the front and back, and the periphery of the interface is waterstopped and joined. This allows the joint A to be joined easily in a short time compared to the conventional case of vulcanization joining using a joining mold. Also, even divided waterstop joint members 10A can be easily joined by simply covering the front side with the waterstop sheet member 30, and the number of joints A (the number of divisions + 1) can be joined to form the annular flexible waterstop joint 10 in a short time.

[0050] According to the joint structure 100 of the flexible waterstop member, the waterstop sheet member 30 comprises a naturally vulcanizing sheet material that is in contact with the front surface 10a of the flexible waterstop joint 10 and vulcanized and bonded thereto. According to this configuration, the naturally vulcanized sheet material of the waterstop sheet member 30 can be pressed against the flexible waterstop joint 10 and roll-pressed to easily attach and bond the flexible waterstop joint 10 due to its adhesiveness. In addition, the naturally vulcanized material increases adhesive strength over time, further improving waterstop performance.

[0051] According to the joining structure 100 of the flexible water-stopping member, the fixing member 20 has a fastening portion 22 that is fastened to the structure 1, and a groove portion 21 that extends from one end of the fastening portion 22 and is attached to the fixing ridge portion 13, and the groove portion 21 has a pressing portion 24 that presses against the water-stopping sheet member 30 covering the outer surface 13b of the fixing ridge portion 13, which is formed integrally with or separately from the fixing member 20. According to this configuration, by providing the pressing portion 24 that presses the waterstop sheet member 30 against the outer surface 13b of the fixing ridge portion 13 in the concave groove portion 21 of the fixing member 20, the waterstop sheet member 30 can be reliably covered and adhered to the outer surface 13b of the fixing ridge portion 13, thereby maintaining watertightness. Furthermore, by making the pressing portion 24 a separate body and arranging the pressing portion 24 only at the joint A, it is possible to efficiently watertight the joint A with the fixing member 20 of the same specifications.

[0052] According to the joining structure 100 of a flexible water-stopping member, the fixing member 20 comprises a fastening portion 22 which is fastened to the structure 1, and a groove portion 21 which extends from one end of the fastening portion 22 and is attached to the fixing ridge portion 13, and the fixing ridge portion 13 is formed to a width b which is smaller than the groove width B of the groove portion 21. According to this configuration, by making the width b of the fixing convex strip portion 13 of the flexible water stop joint 10 smaller than the groove width B of the concave groove portion 21 of the fixing member 20, attachment and detachment becomes easier, and the joining work can be completed in a short time.

[0053] According to the joint structure 100 of the flexible water-stopping member, the fixing ridge portion 13 is formed to have a height larger (by h) by a volume corresponding to the width b smaller than the groove width B of the groove portion 21. According to this configuration, even if the width b of the fixing ridge portion 13 is reduced, the height is increased by the same amount (h) to keep the volume the same, and therefore, when the fixing ridge portion 13 is tightened in the groove portion 21, the same adhesion as before can be ensured and the fixing can be reliably fixed.

[0054] According to the joint structure 100 of the flexible water-stopping member, the fixing ridge portion 13 at the joint A is formed to a width b1 that is smaller than the groove width B of the recessed groove portion 21 by twice the thickness of the water-stopping sheet member 30. According to this configuration, even if the water-stopping sheet member 30 is placed to cover the outside of the fixing ridge portion 13 at the joint A of the flexible water-stopping joint 10, the width of the fixing ridge portion 13 is narrowed to b1 accordingly, so that the fixing member 20 can be easily attached and detached to the joint A and can be efficiently joined in a short time.

[0055] According to the joint structure 100 of the flexible water-stopping member, the fixing convex stripe portion 13 at the joint portion A is formed to have a width smaller than the groove width B of the concave groove portion 21 by twice the thickness of the water-stopping sheet member 30 without interfering with the water-stopping line portion 14. According to this configuration, when the width b of the fixing ridge portion 13 is narrowed, it is possible to prevent interference with the water-stopping line portion 14, thereby preventing water leakage due to interference and ensuring a water-stopping state.

[0056] According to the method for repairing a flexible water stop member, the following steps are performed: removing the fixing member 20 and removing the water stop joint member 10A1 having at least the damaged portion 10b of the joint structure 100 of the flexible water stop joint between the joint portions A; installing a water stop joint member 10A2 for repair in the joint portion 2 from which the water stop joint member 10A1 having the damaged portion 10b has been removed; and installing a water stop sheet portion 10A2 across the joint portion A between the existing water stop joint member 10A and the water stop joint member 10A2 for repair. The repair process includes a step of covering the front surfaces 10a of the waterstop joint members 10A, 10A2 and the outer surfaces 13b of the fixing ridges 13 with a waterstop sheet member 30, and a step of fastening the fixing ridges 13 covered with the waterstop sheet member 30 with a fixing member 20 and pressing the waterstop line portions 14 to cover and fix the outer surfaces 14a of the waterstop line portions 14 up to the surface 1a of the structure 1 with the waterstop sheet member 30. According to this configuration, the waterstop joint member 10A1 with the damaged portion 10b, which is divided and fixed, can be easily joined and repaired in a short time by simply removing it and replacing it with the repair waterstop joint member 10A2, and covering the joint portion A with the waterstop sheet member 30 and fastening it with the fixing member 20. In addition, the repair work can be performed only from the front side of the flexible waterstop joint 10, which provides excellent workability. Previously, it was necessary to cut and remove the remaining flexible watertight joint, including the damaged portion, prepare a repair flexible watertight joint, and vulcanize the joint using a joining mold; this process took a long time and made it difficult to carry out repairs, for example, by working only at night. However, with this repair method, it is now possible to easily carry out repairs by working only at night.

[0057] The flexible watertight joint 10 described in the above embodiment is merely an example, and the shapes of the expansion and contraction portion 11 and the fixing ridge portion 13 are not limited to the illustrated example, and may be other shapes. Furthermore, the configuration of the fixing member 20 is not limited to that described in the above embodiment, and is not limited in any way as long as it has the same function. Furthermore, the invention described in each claim of this application is not limited to being constituted by a single constituent element, but can also be constituted by combining the constituent elements of each claim. For example, the invention can be constituted by combining claims 1 to 3 with claim 4, claims 1 to 4 with claim 5, etc., in the same manner. [Explanation of symbols]

[0058] 100 Joint structure of flexible watertight joint 1 structure 1a surface 2 Joint 3 Anchor bolts 10 Flexible water stop joint 10a Front surface 10b Damaged area 10A Watertight Joint Materials 10A1 Damaged watertight joint components 10A2 Repair water stop joint parts 10B Corner joint member 10C Corner joint parts 11 Telescopic part 12 Anchoring part (edge) 13 Fixing protrusion 13a Outer edge 13b External surface 13c top surface 14 Water-stopping line section 14a External surface 20 Fixing member 21 Groove 21a Groove side 22 Fastening Part 23 Support part 24 Presser section 30 Waterproof sheet material A joint

Claims

1. A joint structure of a flexible water stop joint comprising an expansion section and fixing ridges at both end edges of the expansion section, the fixing ridges being pressed and fixed by a fixing member across a joint of a structure, The flexible watertight joint is provided with a watertight line portion that protrudes toward the structure from the fixing protrusion portion and is located at an outer end portion thereof and is pressed to stop water from flowing. The joint of the flexible watertight joints that are butted against each other has a watertight sheet member that spans the joint and covers the front surface of the flexible watertight joint and the outer surface of the fixing convex stripe portion, and the outer surface of the watertight stripe portion pressed against the surface of the structure is covered by the watertight sheet member up to the surface of the structure to stop water flow between the joints. A joining structure for a flexible water stop joint.

2. A joint structure of a flexible water stop joint comprising an expansion section and fixing ridges at both end edges of the expansion section, the fixing ridges being pressed and fixed by a fixing member across a joint of a structure, The flexible water stop joint includes a water stop joint member divided into a plurality of parts along the joint portion, and a water stop line portion that protrudes toward the structure from the fixing convex portion of the water stop joint member and is located at an outer end portion thereof and is pressed to stop water; The joint of the waterproof joint members that are butted against each other has a waterproof sheet member that straddles the joint and covers the front surface of the waterproof joint member and the outer surface of the fixing convex stripe portion, and the outer surface of the waterstop stripe portion pressed against the surface of the structure is covered by the waterproof sheet member up to the surface of the structure to stop water flow between the joint members. A joining structure for a flexible water stop joint.

3. The waterstop sheet member includes a naturally vulcanizing sheet material that is in contact with and vulcanized-bonded to a surface of the flexible waterstop joint.

3. The joining structure of a flexible water stop joint according to claim 1 or 2.

4. The fixing member includes a fastening portion that is fastened to the structure, and a groove portion that extends from one end of the fastening portion and is attached to the fixing protrusion portion, The groove portion has a pressing portion that is formed integrally with or separately from the fixing member and that presses against the water-stop sheet member covering the outer surface of the fixing protrusion portion.

3. The joining structure of a flexible water stop joint according to claim 1 or 2.

5. The fixing member includes a fastening portion that is fastened to the structure, and a groove portion that extends from one end of the fastening portion and is attached to the fixing protrusion portion, The fixing protrusion is formed to have a width smaller than the groove width of the recessed groove.

3. The joining structure of a flexible water stop joint according to claim 1 or 2.

6. The fixing protrusion is formed to have a height larger than the groove width of the recessed groove by a volume smaller than the width of the recessed groove.

3. The joining structure of a flexible water stop joint according to claim 1 or 2.

7. The fixing protrusion portion at the joint portion is formed to have a width smaller than the groove width of the concave groove portion by twice the thickness of the water-stop sheet member.

3. The joining structure of a flexible water stop joint according to claim 1 or 2.

8. The fixing convex stripe portion at the joint portion is formed to have a width smaller than the groove width of the concave groove portion by twice the thickness of the waterstop sheet member without interfering with the waterstop stripe portion.

3. The joining structure of a flexible water stop joint according to claim 1 or 2.

9. A process of removing a water stop joint member having at least a damaged portion of the joint structure of a flexible water stop joint according to claim 1 or 2 between the joint portions by removing a fixing member; A step of installing a repair waterstop joint member in the joint portion from which the waterstop joint member having the damaged portion was removed; A step of covering the joint between the existing waterstop joint member and the repair waterstop joint member with a waterstop sheet member up to the front surface of the waterstop joint member and the outer surface of the fixing protrusion portion; a step of fastening the fixing convex stripe portion covered with the waterstop sheet member with the fixing member and pressing the waterstop line portion to cover and fix the outer surface of the waterstop line portion with the waterstop sheet member up to the surface of the structure, thereby repairing the joint portion with the waterstop joint member for repair; A method for repairing a flexible water stop joint comprising the steps of:

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