Method of constructing floor slab for preventing water leakage in expansion gap of bridge and expansion gap filling member

Abstract

To provide a bridge expansion gap water leakage countermeasure floor block work execution method and an expansion gap filling member, capable of not only executing a water leakage countermeasure of an expansion gap joint of a bridge from under a floor block but also avoiding that the expansion gap joint is always in a water stagnation state.SOLUTION: The method includes an expansion gap filling member inserting step of inserting an expansion gap filling member into the expansion gap joint from under the floor slab in a state in which the expansion gap filling member is compressed by sucking air from the expansion gap filling member, and an expansion gap filling member expanding and filling step of expanding the expansion gap filling member by naturally supplying air to restore the expansion gap filling member to fill and bring the expansion gap filling member into close contact with the inside of the expansion gap joint.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a bridge gap water leakage prevention under-slab construction method that enables water leakage prevention measures for bridge gap joints to be carried out from under the deck, and a gap filling member used therefor. More specifically, the present invention relates to a bridge gap water leakage prevention under-slab construction method that uses a gap filling member made of a sponge material that can be compressed by suction to carry out water leakage prevention measures from under the deck while preventing water stagnation, by carrying out water leakage prevention measures for bridge gap joints from under the deck. [Background technology]

[0002] Conventionally, the most common method for preventing water leakage from the gaps in railway bridges is to attach a sheet from the bridge surface to the gaps outside of train operating hours to prevent water leakage into the gaps. However, when applied to railway bridges, this method of preventing water leakage from bridge gaps requires work to be done at night when trains are not running, and the work must be done in a short time, which increases labor costs and makes quality control difficult.

[0003] For example, Patent Document 1 discloses a gap repair method in which a gap repair member 1 is inserted into a joint (gap 104) of an expansion joint 105 of a road bridge from the side of a bridge 100 along the width W direction, a rubber bag 50 is inserted into the joint (gap 104) from the end in the width W direction, air is injected into the rubber bag 50 to inflate it, the gap repair member 1 is fixed to the joint (gap 104), and then it is bonded with an adhesive (see claim 1 in the claims of Patent Document 1, paragraphs

[0071] to

[0099] of the specification, Figures 5 to 9 of the drawings, etc.).

[0004] However, although the gap repair method described in Patent Document 1 is described as not requiring traffic restrictions, even though it is performed from the side, the work is performed from above the joint, so if it is applied to a railway bridge that does not have an expansion joint 105, the work must be done outside of train operating hours, and there is also the problem that the area above the gap repair member 1 will always be waterlogged.

[0005] Meanwhile, methods that can be applied from the underside of a bridge (deck slab) have also been proposed. For example, Patent Document 2 discloses a method for manufacturing a waterstop material for a joint gap, which comprises an arrangement step of arranging a hose having a mesh region in the joint gap, and a waterstop material formation step of filling the inside of the hose with a foaming material, causing the foaming material to overflow above the hose through the mesh region by foaming pressure and / or injection pressure of the foaming material, and then expanding and hardening to form a waterstop material (see claim 1 in the scope of claims of Patent Document 2, paragraphs

[0016] to

[0041] of the specification, Figures 4 to 6 of the drawings, etc.).

[0006] Patent Document 3 also discloses a hose for manufacturing a watertight gap material, which is stretchable and has a mesh region through which a foam material for manufacturing the watertight gap material passes, and which is characterized in that the foam material is injected into the inside of the hose, causing the hose to stretch and increasing the gaps in the mesh region, causing the foam material to overflow to the outside of the hose through the gaps. Similarly to Patent Document 1, Patent Document 3 discloses a method for manufacturing a watertight gap material, which comprises an arrangement step of arranging the hose in the gap, and a watertight material formation step of injecting foam material into the inside of the hose and causing the foam material to overflow to the top of the hose through the gaps in the mesh region using the foaming pressure of the foam material and / or the injection pressure of the foam material, thereby forming the watertight gap material (see claims 1 and 7 of Patent Document 3, paragraphs

[0016] to

[0052] of the specification, and Figures 5 to 7 of the drawings, etc.).

[0007] However, when the manufacturing methods for waterproofing materials for joint gaps in Patent Documents 2 and 3 are applied to joint gaps in railway bridges, not only does it have to be applied from above the bridge surface outside of train operating hours, but there are also problems in that it is difficult to prepare the base inside the joint gap, and waterproofing cannot be maintained due to poor adhesion.

[0008] Furthermore, Patent Document 4 discloses a drainage device comprising a drainage member 21 having a drainage main body 22 with a recess 22a, flange portions 23 arranged on both sides of the upper part of the drainage main body 22, and a vertical plate portion 24 formed upward from the lower part of the drainage main body 22 so as to divide the recess 22a into two, and in which multiple drainage members 21 are attached and arranged from below horizontal joints or vertical joints formed between the deck slabs of a bridge (see claims 1 and 7 of Patent Document 4, paragraphs

[0011] to

[0018] of the specification, Figures 1 to 5 of the drawings, etc.).

[0009] However, the drainage device described in Patent Document 4 does not take into account the gaps in railway bridges, and when applied to the gap joints of railway bridges, water will always remain stagnant on top of the drainage member 21, causing water to seep in through cracks in the concrete structure, which could potentially cause the internal reinforcing bars to rust and reduce the durability of the concrete structure. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] JP 2019-15045 A [Patent Document 2] Patent No. 4378427 [Patent Document 3] Patent No. 5284857 [Patent Document 4] Japanese Patent Application Publication No. 11-200317 Summary of the Invention [Problem to be solved by the invention]

[0011] The present invention was devised in consideration of the above-mentioned problems, and its purpose is to provide a bridge gap water leakage prevention under-deck construction method and gap filling member that not only enables water leakage prevention measures for bridge gap joints to be carried out from under the deck, but also prevents the gap joints from being constantly waterlogged. [Means for solving the problem]

[0012] The under-deck construction method for preventing water leakage from bridge gaps according to the first invention is a under-deck construction method for preventing water leakage from bridge gap joints that enables construction of measures to prevent water leakage from bridge gap joints from under the deck, and is characterized by comprising a gap filling member insertion process in which air is sucked into a gap filling member made of a spongy sponge material loaded into a resin film, and the gap filling member is inserted into the gap joint from under the deck in a compressed state, and a gap filling member expansion and filling process in which air is naturally supplied to the gap filling member to restore its original shape, causing the gap filling member to expand and fill and seal the gap joint with the gap filling member.

[0013] The second invention is a bridge gap leakage prevention under-deck construction method according to the first invention, characterized in that after the gap filling material expansion filling process, it includes a rubber material bonding process in which rubber material is inserted from under the deck slab into the bottom of the gap and fixed with adhesive to seal the water.

[0014] The gap filling member of the third invention is a gap filling member used in the bridge gap leakage prevention under-deck construction method described in claim 1 or 2, and is characterized in that it comprises a spongy sponge material and a resin film covering the sponge material, and is configured so that the sponge material can be compressed by sucking air from within the resin film.

[0015] The gap filling member according to a fourth aspect of the present invention is the third aspect of the present invention, characterized in that a plate material serving as a core material is inserted between the sponge materials.

[0016] The gap filling member of the fifth invention is characterized in that, in the fourth invention, one end of the communication hole of the resin film is sandwiched between the sponge material and the plate material, and the time it takes for the sponge material to expand and restore is delayed. [Effects of the Invention]

[0017] According to the first to fifth inventions, not only can measures to prevent water leakage from bridge gaps be carried out from under the deck slab, but it is also possible to prevent water from accumulating in the gap joints, thereby improving the durability of the bridge structure. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a horizontal cross-sectional view showing the configuration of a gap filling member for a general section according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram showing a schematic configuration of the gap filling member of the same, where (a) is a front view and (b) is a cross-sectional view taken along line AA in FIG. 2(a). [Figure 3] Fig. 3(a) is a layout diagram showing an example of placing the gap filler in a gap joint of a bridge. Fig. 3(b) is a front view showing an example of the size of a type A gap filler 1, and Fig. 3(c) is a front view showing an example of the size of a type B gap filler 1. Fig. 3(d) is a front view showing an example of the size of a type C gap filler 1, and Fig. 3(e) is a front view showing an example of the size of a type D gap filler 1. [Figure 4] FIG. 4 is a vertical cross-sectional view showing the configuration of a molded rubber according to an embodiment of the present invention. [Figure 5] FIG. 5 is a process explanatory diagram showing the step of inserting a gap filling member in the bridge gap leakage prevention under-deck construction method according to the embodiment of the present invention. [Figure 6] FIG. 6 is a process explanatory diagram showing the expansion filling process of the gap filling material in the bridge gap leakage prevention under-slab construction method. [Figure 7] FIG. 7 is a process explanatory diagram showing the rubber material bonding process of the above-mentioned bridge gap water leakage prevention under-slab construction method. [Figure 8] FIG. 8 is a diagram showing the completed state of the bridge gap water leakage prevention work using the bridge gap water leakage prevention under-decks construction method. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment of a gap filling member and a bridge gap leakage prevention under-deck construction method according to the present invention will be described in detail with reference to the drawings.

[0020] [Gap filling material] First, a gap filling member 1 used in a bridge gap leakage prevention under-deck construction method according to an embodiment of the present invention will be described with reference to Figures 1 to 3. Figure 1 is a horizontal cross-sectional view showing a schematic configuration of the gap filling member 1 according to an embodiment of the present invention, and Figure 2 is a diagram showing a schematic configuration of a general gap filling member 1 according to this embodiment, where (a) is a front view and (b) is a vertical cross-sectional view taken along line AA in Figure 2(a).

[0021] As shown in Figure 1, the gap filling member 1 of this embodiment is composed of a 5 mm thick hollow thick plate 2 made of resin cardboard or other material that serves as the core material, 20 mm thick sponge materials 3, 3 arranged on both sides of the hollow thick plate 2, and a resin film 4 that covers the hollow thick plate 2 and the sponge materials 3, 3, and has the function of preventing water from accumulating by filling the gap joints.

[0022] (hollow plate) The hollow thick board 2 according to this embodiment is a plastic cardboard made of resin such as polypropylene (PP). It is a hollow resin board with a cardboard structure, in which flat resin liners are attached to both sides of the corrugated flutes that form the core. Of course, the hollow thick board according to this invention is not limited to a cardboard structure, but can be any extruded hollow thick board. In short, a lightweight hollow board is preferable as the core material of the gap filler 1, as it has sufficient rigidity to prevent bending when inserted into the gap joint of a bridge. However, the core material of the gap filler 1 according to this invention may be a lightweight board, such as a polypropylene resin board or a foamed resin board such as polystyrene foam, that has sufficient strength and rigidity to easily insert into a bridge joint without sagging when held at one end.

[0023] (sponge material) The sponge material 3 is a spongy material made of foamed resin such as polyurethane (PUR), polystyrene (PS), polyolefin (polyethylene (PE), polypropylene (PP), etc.), or rubber such as silicone rubber or urethane rubber, and its volume changes significantly when compressed and restored.

[0024] (resin film) The resin film 4 is a highly airtight film (for example, a film with an oxygen permeability of 1 ml / m ) such as polyethylene vinyl alcohol (EVOH), polyvinylidene chloride (PVDC), nylon, or an inorganic vapor-deposited plastic film on which an inorganic material such as aluminum is vapor-deposited. 2 Of course, the resin film according to the present invention is not limited to a highly airtight film, and any resin film that can absorb air and keep the entire gap filler 1 compressed within the construction time required to insert the gap filler 1 into a narrow bridge gap joint may be used, such as a general packaging plastic film made of PE, PP, PS, PC, PET, PVC, EVA, or the like.

[0025] As shown in Figure 2, one end of the resin film 4's communication opening 4a of this gap filler 1 is sandwiched between the sponge material 3 and the hollow thick plate 2, which serves as the core material. By folding the end of the resin sheet 4 between the hollow thick plate 2 and the sponge material 3 in this way, the suction hose and the film come into close contact during suction, preventing air leakage and allowing the gap filler 1 to slowly return to its original shape when the suction hose (not shown) is removed. In other words, the communication opening 4a serves as an inflow path for outside air during natural recovery, but the expansion pressure of the expanding sponge material blocks the inflow of outside air, delaying the time it takes for the sponge material 3 to expand and return to its original shape. This allows for more time for the gap filler insertion and installation process (described later), eliminating the need to start over with air suction, improving work efficiency.

[0026] The communication port 4a is formed by welding a cylindrical resin film made of the same material as the resin film 4 to the body of the resin film 4, and has the function of connecting the inside and outside of the resin film 4, and serves as an outlet when air is sucked and compressed by a compressor or the like, or as an inlet when air naturally flows in from the outside. Also, the reference numeral 4b denotes a hot seal portion 4b that is heat-welded to seal the end of the resin film 4 after the hollow thick plate 2 and sponge material 3 are housed therein.

[0027] Next, the arrangement of the gap filler 1 according to this embodiment will be described with reference to FIG. 3. FIG. 3(a) is an arrangement diagram showing an example of how to arrange a gap filler in a gap joint of a bridge. FIG. 3(b) is a front view showing an example of the size of a Type A gap filler 1, and FIG. 3(c) is a front view showing an example of the size of a Type B gap filler 1. FIG. 3(d) is a front view showing an example of the size of a Type C gap filler 1, and FIG. 3(e) is a front view showing an example of the size of a Type D gap filler 1. In the drawings, the symbol X indicates the bridge axis direction X, the symbol Y indicates the direction perpendicular to the bridge axis Y, and the symbol Z indicates the up-down direction.

[0028] As shown in Figure 3(a), as a countermeasure against water leakage from the gap joints of bridge B1, which is a deck girder bridge, an example is explained in which multiple types of gap filling members 1 with different length and width dimensions to fit the shape of the gap joint are arranged side by side along the direction Y perpendicular to the bridge axis so that their short sides abut each other.

[0029] The gap filling members 1 of types A to D have the same structure and thickness (45 mm) as mentioned above, but differ in their widthwise dimensions along the direction perpendicular to the bridge axis Y and their vertical dimensions along the vertical direction Z. Type A gap filling member 1 is a filling member for the general part of the gap joint, and as shown in Figure 3(b), has a width W1 = 1000 mm and a height H1 = 450 mm. As shown in Figure 3(a), seven Type A gap filling members 1 are lined up in seven places in the deepest part of the gap joint, spanning a distance of 7 m.

[0030] The width W1 of this Type A gap filling member 1 is set to a convenient 1m, which is an appropriate width for a single worker to carry manually, and the height H1 is set to 450mm, which is the 600mm depth of the gap joint J1 minus the 50mm construction allowance for the lower molded rubber 5 and the 100mm gap provided so as not to interfere with the use of the bridge above (train traffic).For this reason, even in the deepest part of the gap joint J1, construction of Type A gap filling member 1 can be completed in the vertical direction Z by simply inserting one piece of gap filling member 1 and letting it naturally return to its original shape to fill and adhere tightly.

[0031] As shown in Figure 3(a), Type B gap filling members 1 are installed in two locations on the haunch portion of the bridge, adjacent to the outer side of Type A gap filling members 1. The width W1 of Type B gap filling members 1 is 1000 mm, the same as Type A. However, because Type B gap filling members 1 are installed on the haunch portion, their lower ends are inclined, with a height H2 of 271 mm on one side and a height H3 of 205 mm on the other side.

[0032] As shown in Figure 3(a), Type C gap filling members 1 are installed in two locations on the haunch of the bridge, one adjacent to the outside of Type B gap filling member 1. Since Type C gap filling members 1 are installed on the outer haunch of Type B, the height of one end (left and right) is set to H3 = 205 mm, and the height of the other end (H4 = 139 mm), and the bottom end is aligned in a straight line with the bottom end of Type B and is inclined.

[0033] As shown in Figure 3(a), Type D gap filling members 1 are installed in two locations on the outermost part of the bridge, adjacent to the outer side of Type C gap filling members 1. The width W2 of Type D gap filling members 1 is set to W2 = 550 mm, which corresponds to the remaining width of the bridge. Furthermore, because Type D gap filling members 1 are installed on the outside of Type C, the height H4 at one end on the left and right is H4 = 139 mm, the same as Type C, and the other end is set to W3 = 491 mm (W4 = 59 mm), H4 = 97 mm (H5 = 43 mm) to match the shape of the end of the bridge.

[0034] [Molded rubber] Next, a molded rubber 5 according to an embodiment of the present invention, which is used in a bridge gap leakage prevention under-deck construction method according to an embodiment of the present invention, will be described with reference to Fig. 4. Fig. 4 is a vertical cross-sectional view showing the configuration of the molded rubber 5 according to an embodiment of the present invention.

[0035] As shown in Figure 4, the molded rubber 5 according to this embodiment is an inverted U-shaped rubber material, with the outer portion 5a that comes into contact with the concrete being a non-foamed solid rubber made of chloroprene rubber (CR), which has excellent weather resistance. The inner portion 5b of the molded rubber 5 is made of natural rubber (NR), which has excellent elasticity. The outer surface of the outer portion 5a of the molded rubber 5 that comes into contact with the concrete is formed with a plurality of protrusions 5c that increase friction resistance with the gap joints to prevent the rubber from falling.

[0036] The tip (bottom end) of the inverted U-shape of the molded rubber 5 is folded back to form a protruding portion 5d that protrudes outward. This is to prevent a gap from forming where the molded rubber 5 and the joint J1 come into contact, following the shape of the chamfered portion of the concrete part of the joint.

[0037] This molded rubber 5 has a width W5 of 52 mm, which corresponds to the width of the joint of the bridge B1 as a whole, and a depth D1 for insertion into the joint J1 of 38 mm. This molded rubber 5 is adhered to the joint J1 of the bridge with an adhesive suitable for bonding concrete and rubber materials. The molded rubber 5 according to this embodiment is adhered with a two-component curing epoxy resin that uses a modified aliphatic polyamine as a curing agent.

[0038] Next, a bridge gap water leakage prevention under-deck construction method according to an embodiment of the present invention will be described with reference to Figures 5 to 8. The bridge gap water leakage prevention under-deck construction method according to this embodiment is a construction method for carrying out leakage prevention work on the gap joint J1 (joint portion) of a railway bridge B1, and is a construction method for working from under the deck slab, which enables daytime work to prevent leakage at the gap joint J1 regardless of whether trains are running.

[0039] (Gap filling material insertion process) 5 is a process explanatory diagram showing the gap filling member insertion process of the bridge gap leakage prevention under-slab construction method according to the embodiment of the present invention. As shown in FIG. 5, the bridge gap leakage prevention under-slab construction method according to the embodiment of the present invention first performs the gap filling member insertion process of inserting the gap filling member 1 into the gap joint J1 from under the deck slab.

[0040] In this process, the gap filling member 1 is inserted into the gap joint J1 in a compressed state by sucking out the air from the gap filling member 1 and with an adhesive applied to the outer surface of the resin film 4. However, as will be described later, the sponge material 3 expands due to its restoring force, and the expansion pressure fills and adheres to the gap joint J1, thereby waterproofing it, so adhesive does not have to be used. At this time, as mentioned above, because the gap filling member 1 is covered with the resin film 4, it is easy to compress the entire gap filling member 1, including the sponge material 3, simply by sucking out the air from within the resin film 4, and because the resin film 4 also has a certain degree of airtightness, it can maintain its compressed state for a certain period of time.

[0041] Furthermore, as mentioned above, the gap filler 1 has the hollow thick plate 2 made of resin plate sandwiched between the sponge materials 3, 3, so that the core hollow thick plate 2 maintains its plate shape while only the sponge materials 3, 3 are compressed, allowing the gap filler 1 to be compressed only in the thickness direction and made thinner. For this reason, in this process, the gap filler 1 can be easily inserted into the narrow gap joint J1.

[0042] (Gap filling material expansion filling process) 6 is a process explanatory diagram showing the gap filling member expansion filling process of the bridge gap leakage prevention under-slab construction method according to this embodiment. As shown in FIG. 6, the bridge gap leakage prevention under-slab construction method according to this embodiment next carries out a gap filling member expansion filling process in which the gap filling member 1 inserted into the gap joint J1 in the previous process is expanded to fill and adhere to the gap joint J1.

[0043] However, in this process, a tube or the like is inserted into the mouth of the gap filling member 1 and air is naturally supplied from the outside of the resin film 4, restoring the compressed sponge material 3 to its original thickness, thereby expanding the gap filling member 1 within the gap joint J1 and pressing the gap filling member 1 against the concrete surface of the gap joint J1 to make it adhere tightly.

[0044] Furthermore, because the sponge material 3 has a restoring force that causes it to return to its original thickness, this restoring force presses the gap filling member 1 against the concrete surface of the gap joint J1. Therefore, until the adhesive applied to the outer surface of the resin film 4 in the previous process hardens, the gap filling member 1 is held in the gap joint J1 by this restoring force alone, without the need for manual support. This ensures reliable adhesion between the resin film 4 and the concrete surface of the gap joint J1, thereby achieving waterproofing. Furthermore, the restoring force of the sponge material 3 continues to act until the sponge material 3 deteriorates, so a certain degree of waterproofing effect can be achieved even without adhesive. At the very least, by filling the gap joint J1 with the gap filling member 1, it is possible to prevent water from accumulating in the gap joint J1.

[0045] 7 is a process explanatory diagram showing the rubber material bonding process in the bridge gap water leakage prevention under-slab construction method according to this embodiment. As shown in Fig. 7, in the bridge gap water leakage prevention under-slab construction method according to this embodiment, the rubber material bonding process is next carried out in which the molded rubber 5 described above is inserted below the gap filling member 1 filled and bonded into the gap joint J1 in the previous process, and then bonded and fixed with an adhesive to stop water.

[0046] In this process, the two-component curing epoxy resin described above is applied to the surface of the outer portion 5a of the molded rubber 5, and then the molded rubber 5 is inserted into the joint J1 (see also Figure 4). At this time, the inner portion 5b of the molded rubber 5 is made of highly elastic natural rubber (NR), so until the applied adhesive hardens, the natural rubber (NR) and the chloroprene rubber (CR) of the outer portion 5a allow the molded rubber 5 to be held in the joint J1 without the need for human support, thereby reliably adhering the molded rubber 5 to the joint J1 and making it waterproof.

[0047] 8 is a diagram showing the completed state of the bridge gap water leakage prevention work using the bridge gap water leakage prevention under-deck construction method according to this embodiment. When the rubber material bonding process is completed and the adhesive hardens, the water leakage prevention work is completed at the bridge gap J1 (joint portion) of the railway bridge B1, as shown in FIG.

[0048] According to the gap filling member and bridge gap leakage prevention under-deck installation method of this embodiment described above, it is possible to complete the work of preventing water leakage in the bridge gap of a railway bridge from under the deck slab during daytime work without restricting train traffic. Moreover, not only is watertight achieved by adhering molded rubber 5 to the lower part of the gap joint J1, but the entire gap joint J1 above that can be filled and sealed with the gap filling member 1. This not only provides double watertightness, but also prevents the gap joint J1 from being constantly watertight by filling it with the gap filling member 1, thereby improving the durability of the bridge structure.

[0049] The gap filling member 1 and the bridge gap leakage prevention under-deck construction method according to the embodiment of the present invention have been described in detail above, but the above-mentioned and illustrated embodiments are merely examples of specific embodiments for carrying out the present invention. Therefore, the technical scope of the present invention should not be interpreted as being limited by these embodiments.

[0050] In particular, the dimensions of each component described in the description of the gap filling component 1 are merely given as an example of an embodiment of the present invention, and it goes without saying that the components are not limited to these dimensions. [Explanation of symbols]

[0051] 1: Gap filling material 2: Hollow plate 3: Sponge material 4: Resin film 4a: Communication port 4b: Hot seal section 5: Molded rubber 5a: Outer part 5b:Inner part 5c:Protrusion 5d: Overhang B1: Railway bridge (bridge) J1: Joint

Claims

1. A bridge gap water leakage prevention under-slab construction method that enables construction of bridge gap water leakage prevention measures from under the deck, a gap filler insertion process in which the gap filler, which is a spongy sponge material loaded in a resin film, is inserted into the gap joint from under the deck slab while the gap filler is compressed by sucking air from the gap filler; The gap filling member expansion filling step is provided, in which the gap filling member is expanded by naturally supplying air to restore the gap, thereby filling and adhering the gap joint with the gap filling member. A bridge gap leakage prevention under-deck construction method characterized by the above.

2. After the gap filling member expansion filling process, a rubber material adhering process is performed in which a rubber material is inserted into the lowest part of the gap from under the deck slab and fixed with an adhesive to stop water leakage.

2. The method for under-deck construction for preventing water leakage between bridge gaps according to claim 1.

3. A gap filling member used in the bridge gap leakage prevention deck under-construction method according to claim 1 or 2, The device is comprised of a spongy sponge material and a resin film covering the sponge material, and is configured so that the entire device, including the sponge, can be compressed by sucking air from within the resin film. A gap filling member characterized by the above.

4. A plate material that serves as a core material is inserted between the sponge materials. The gap filling member according to claim 3,

5. One end of the communication port of the resin film is sandwiched between the sponge material and the plate material, and the time it takes for the sponge material to expand and restore is delayed. The gap filling member according to claim 4,

Images