Construction joint water stop device and water stop structure

Abstract

The utility model relates to the field of building waterproof device especially, a construction joint water stop device and water stop structure that guarantee that the gap will not appear between water stop device and concrete structure when the construction joint occurs expansion and contraction, including water stop steel sheet, including the extrusion strip of setting in the construction joint, and the extrusion end of water stop steel sheet sets up on the extrusion strip, including pre -tightening mechanism, pre -tightening mechanism is connected with water stop steel sheet, and pre -tightening mechanism drives the extrusion end extrusion extrusion strip to make extrusion strip deformation inflation and then seal construction joint. The utility model is especially applicable to the water stop technology of the construction joint easy expansion and contraction.

Description

Technical Field

[0001] This utility model relates to the field of building waterproofing devices, and in particular to a construction joint water-stopping device and water-stopping structure. Background Technology

[0002] During the construction of a house, it is sometimes necessary to divide the main structure into several sections and construct them separately in a certain order. After separate construction, if two adjacent construction sections within the main structure are constructed in different orders, the concrete adhesion at the joints may be poor, which can easily lead to structural leaks.

[0003] Taking the scheme disclosed in CN205934990U as an example, it discloses a construction joint waterproofing device. This scheme uses an externally attached waterproofing steel plate, connected to an embedded part of the concrete structure via connectors, to repair leakage problems in the concrete structure. The connectors include: a connection hole in the externally attached waterproofing steel plate; an expansion rubber ring inside the connection hole; an installation part for connecting to the embedded part; and a waterproofing gasket for the embedded part to pass through and placed between the installation part and the externally attached waterproofing steel plate. However, in actual use, this scheme cannot guarantee the connection strength of the construction joint waterproofing device. Therefore, when expansion and contraction occur at the construction joint, gaps easily appear between the waterproofing device and the concrete structure, leading to water seepage and affecting the waterproofing performance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a construction joint water-stopping device and water-stopping structure that ensures that no gaps will appear between the water-stopping device and the concrete structure when the construction joint expands or contracts.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a construction joint water-stopping device, including a water-stopping steel plate, including an extrusion strip set in the construction joint, the extrusion end of the water-stopping steel plate being set on the extrusion strip; including a pre-tightening mechanism, the pre-tightening mechanism being connected to the water-stopping steel plate, the pre-tightening mechanism driving the extrusion end to extrude the extrusion strip so that the extrusion strip deforms and expands, thereby sealing the construction joint.

[0006] Furthermore, extrusion grooves are provided on both sides of the extrusion strip, and the extrusion grooves are provided along the extension direction of the extrusion strip. Water-stop steel plates are provided on both sides of the extrusion strip, and the extrusion ends of the water-stop steel plates are correspondingly located in the extrusion grooves.

[0007] Furthermore, it includes a connecting steel plate that extends along the direction of the waterstop steel plate and is fixedly connected to the waterstop steel plate; it also includes a pre-tightening bolt disposed between the connecting steel plates, one end of which is disposed on one of the connecting steel plates by means of a nut, the nut being disposed on the side of the corresponding connecting steel plate away from the pre-tightening bolt; the other end of the pre-tightening bolt is fixedly disposed on the other connecting steel plate.

[0008] Furthermore, the pre-tightening bolts are evenly distributed between the connecting steel plates along the direction of the connecting steel plates.

[0009] Furthermore, it includes a sealant, which is disposed between the water-stop steel plates, and an extrusion strip is disposed at the bottom of the sealant.

[0010] The construction joint waterproofing structure includes a construction joint waterproofing device and a construction joint, including a water-swellable rubber strip. The water-swellable rubber strip is installed inside the construction joint and below the extrusion strip. The top of the water-swellable rubber strip is tightly attached to the bottom of the extrusion strip.

[0011] Furthermore, it includes a waterproof sealant material, which is placed inside the construction joint, with the top of the waterproof sealant material tightly attached to the bottom of the water-swellable adhesive strip.

[0012] Furthermore, it includes a sealant material, which is placed inside the construction joint and below the waterproof sealant material.

[0013] Furthermore, it includes a centrally embedded waterstop, which is installed inside the construction joint. The centrally embedded waterstop is placed between the joint filler and the waterproof sealant, and its two sides are respectively installed in the concrete on both sides of the construction joint.

[0014] Furthermore, the water-stop steel plate is applied to the concrete on both sides of the construction joint using sealant at the bottom.

[0015] The beneficial effects of this utility model are: 1. In actual use, the extrusion strip is placed inside the construction joint. When subjected to external pressure, the extrusion strip deforms and expands, sealing the construction joint. Furthermore, a pre-tightening mechanism continuously applies pre-tightening pressure to the extrusion strip. Even if the construction joint subsequently expands or contracts, the pre-tightening pressure allows the extrusion strip to deform and expand, adapting to the increased dimensions of the expansion and contraction, thus compensating for the changes in the joint's size and ensuring continued sealing.

[0016] Second, by setting extrusion grooves on both sides of the extrusion strip, with each groove corresponding to the extrusion end of the water-stop steel plate, the extrusion strip is subjected to uniform pressure from both sides simultaneously. This allows the extrusion strip to deform and expand downwards and then laterally, thereby achieving a seal on the construction joint. Due to the limiting effect of the extrusion grooves, the extrusion ends are prevented from sliding off the sides of the extrusion strip during the extrusion and pre-tightening pressure application process, ensuring the stability of the extrusion process and the accurate and controllable pre-tightening pressure.

[0017] Third, by using a nut and a preload bolt, the nut rotates, which in turn drives the gap between the two opposing connecting steel plates to decrease, thus applying preload pressure. This mechanism is simple and can maintain stable preload pressure after it has been applied.

[0018] Fourth, the sealant can further improve the waterproofing effect between the water-stop steel plates. The sealant and the extrusion strip at the bottom of the sealant can work together to improve the overall waterproofing performance.

[0019] 5. Installing water-swellable rubber strips inside construction joints allows a small amount of water seeping into the joint to expand the rubber strips when the extrusion strips age or fail due to extreme conditions. This creates a dual waterproof structure of "extrusion strip compression sealing" and "water-swellable rubber strip water-swelling sealing," greatly improving the waterproofing effect.

[0020] 6. Waterproof caulking material, joint filling material, and embedded waterstop are installed in the construction joint, and together with the extrusion strip and water-swellable rubber strip, they form a waterproof system, which greatly improves the stability of the waterproof system after the construction joint undergoes expansion and contraction.

[0021] This invention is particularly applicable to waterproofing processes where construction joints are prone to expansion and contraction. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of one embodiment of the construction joint waterproofing structure of this utility model.

[0023] Figure 2 yes Figure 1 A schematic diagram showing the positional relationship between the construction joint water-stopping device, the joint filler, the waterproof sealant, and the concrete on both sides of the construction joint.

[0024] Figure 3 yes Figure 1 Exploded view of the construction joint waterproofing device.

[0025] The markings in the diagram are as follows: 1. Concrete; 2. Construction joint water-stopping device; 2. Sealant; 201. Water-stopping steel plate; 202. Extrusion end; 2021. Sealant; 203. Extrusion strip; 204. Extrusion groove; 2041. Connecting steel plate; 205. Pre-tightening bolt; 206. Nut; 207. Embedded water-stop strip; 3. Construction joint; 4. Joint filling material; 5. Waterproof caulking material; 6. Water-swellable adhesive strip; 7. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] like Figures 1 to 3This illustration shows an embodiment of a construction joint sealing device and structure. A construction joint 4 is provided between the concrete 1 on the left and the concrete 1 on the right. An embedded waterstop 3 is installed within the construction joint 4, positioned horizontally within the joint. The two sides of the embedded waterstop 3 are pre-embedded within the concrete 1 on both sides of the construction joint 4. The embedded waterstop 3 is a sealing material installed inside concrete deformation joints, expansion joints, or construction joints, primarily used to prevent water seepage and leakage in building components. It adapts to the expansion and contraction deformation of concrete through high elasticity and compressive deformation. The embedded waterstop 3 is typically made of natural rubber or synthetic rubber.

[0028] The embedded waterstop 3 horizontally divides the construction joint 4 into upper and lower parts. A sealant 5 is placed in the gap below the embedded waterstop 3 within the construction joint 4. The sealant 5 is a specialized material used to fill building gaps, and is mainly divided into traditional sealants, epoxy grouts, and epoxy colored sand types. The sealant 5 can be polymer cement mortar with a strength grade not lower than C30 and a fluidity meeting the standard of "Sealants for Concrete Joints" (JC / T 881).

[0029] A waterproof sealant 6 and a water-swellable adhesive strip 7 are installed in the gap above the embedded waterstop 3 within the construction joint 4. The top of the waterproof sealant 6 is tightly fitted to the bottom of the water-swellable adhesive strip 7. The waterproof sealant 6 is a high-polymer asphalt ointment anti-corrosion and waterproof material, belonging to the epoxy resin type, possessing permanent anti-corrosion and waterproof properties. The waterproof sealant 6 can be made of polyurethane sealant with a tensile strength ≥0.8MPa and an elongation at break ≥300% (compliant with GB / T13477). The water-swellable adhesive strip 7 is made of rubber compound incorporating water-absorbing materials. In its dry state, it looks the same as a regular solid sealant strip. When exposed to water, the water-absorbing material rapidly expands, increasing in volume and filling the gap space, thus achieving a water-stop seal by blocking water flow. The water-swellable adhesive strip can be a putty-type waterstop strip or a water-absorbing and expanding sealant strip. The expansion rate of the water-swellable rubber strip 7 is ≥200%, and the volume change rate after long-term immersion in water is ≤10% (compliant with GB / T 18173.3).

[0030] Above the water-swellable rubber strip 7 inside construction joint 4, a construction joint waterproofing device 2 is installed in close contact. For example... Figure 2 and Figure 3As shown, the construction joint sealing device 2 includes a top sealant 203 and an extrusion strip 204, with the extension direction of the sealant 203 and extrusion strip 204 aligned with the length direction of the construction joint 4. The sealant 203 has an extrusion strip 204 at its bottom, and the sealant 203 and extrusion strip 204 are an integral structure. The extrusion strip 204 is positioned within the construction joint 4, with its bottom tightly attached to the top of the water-swellable adhesive strip 7. The sealant 203 and extrusion strip 204 can be made of silicone weather-resistant sealant, with a displacement capacity of ±25% (compliant with GB / T 14683).

[0031] Water-stop steel plates 202 are respectively set on both sides of the extrusion strip 204. The water-stop steel plates 202 are fixedly connected to the concrete 1 by sealant 201, which can be silicone weather-resistant sealant. When applying sealant 201, a primer can be applied after cleaning the surface of the construction joint 4. The injection depth is ≥10mm, and the curing time is ≤24 hours. The water-stop steel plate 202 is a bent plate structure. An extrusion end 2021 is set on the side of the water-stop steel plate 202 closest to the extrusion strip 204. The extrusion end 2021 can be the side of the water-stop steel plate 202 closest to the extrusion strip 204. Correspondingly, extrusion grooves 2041 are respectively set on the sidewalls of the extrusion strip 204 facing the water-stop steel plates 202 on both sides. The extrusion grooves 2041 extend along the direction of the extrusion strip 204, and the extrusion grooves 2041 form a stepped extrusion waterproof structure between the extrusion strip 204 and the extrusion end 2021. After the extrusion end 2021 is placed inside the extrusion groove 2041, the extrusion ends 2021 on both sides of the extrusion strip 204 continue to move towards each other, further extruding the extrusion strip 204, causing its waist to narrow. The extrusion strip 204 then bulges upward and downward. Since the extrusion strip 204 is made of silicone weather-resistant sealant, it has a large deformation capacity. Therefore, as the waist of the bulging extrusion strip 204 narrows, its head and bottom continue to expand towards both sides, i.e., towards the inner wall of the construction joint 4, achieving a seal. At the same time, the downward bulging extrusion strip 204 pushes the water-swellable adhesive strip 7 to adhere tightly to the caulking material 6.

[0032] The connecting steel plate 205 is fixedly connected to the water-stop steel plate 202, and the connecting steel plate 205 is embedded in the concrete 1 through the water-stop steel plate 202. The connecting steel plates 205 at the bottom of the two water-stop steel plates 20 are connected by pre-tightening bolts 206, which are evenly distributed between the connecting steel plates 205. Figure 3As shown, the left end of the pre-tightening bolt 206 is fixedly connected to the left connecting steel plate 205. The left end of the pre-tightening bolt 206 passes through the right connecting steel plate 205 and is threadedly connected to the nut 207. The nut 207 is tightly fitted onto the right side wall of the right connecting steel plate 205. During actual construction, rotating the nut 207 reduces the distance between the left and right connecting steel plates 205. This, in turn, reduces the distance between the water-stop steel plates 202 corresponding to the connecting steel plates 205. As the distance between the water-stop steel plates 202 decreases, the extrusion end 2021 on the water-stop steel plate 202 begins to extrude the extrusion groove 2041, causing the extrusion strip 204 to deform and expand. Subsequently, the pre-tightening pressure applied by the extrusion end 2021 to the extrusion strip 204 remains continuous. Because of this, when the construction joint 4 expands or contracts, the pre-tightening pressure can drive the extrusion strip 204 to deform, thereby compensating for the construction joint 4 and continuing to seal and waterproof the expanded construction joint 4. Because the bottom of the extrusion strip 204 is tightly fitted with a water-swellable rubber strip 7, even if the extrusion strip 204 fails during subsequent use, causing a small amount of seepage water to flow through the gap between the extrusion strip 204 and the construction joint 4 to the water-swellable rubber strip 7, the water-swellable rubber strip 7 can absorb the aforementioned small amount of seepage water and expand, thereby forming a secondary expansion seal, effectively ensuring the waterproof effect, forming a double waterproof structure of "extrusion strip compression seal" and "water-swellable rubber strip water-swellable seal". The installation steps of the pre-tightening bolt 206 can be carried out as follows: After the concrete 1 is poured to the design elevation, the connecting steel plate 205 is pre-embedded before the initial setting of the concrete 1. After the concrete 1 reaches 70% strength, the water-stop steel plate 202 is bonded to the surface of the concrete 1 with sealant 201, and then the pre-tightening bolt 206 is inserted. The nut 207 is tightened twice with a torque wrench. The initial pre-tightening force is 50% of the design value, and it is increased to 100% after 24 hours. Thus, the water-stop connection device 2 can maintain a stable pre-tightening pressure when the concrete 1 shrinks and deforms. The elastic deformation of the extrusion strip 204 can compensate for the displacement of the construction joint 4, and the water-swellable rubber strip 7 can block the seepage path. The embedded water-stop strip 3 and the sealing system of the water-stop connection device 2 form a deep waterproof system.

Claims

1. A construction joint water-stopping device, comprising a water-stopping steel plate (202), characterized in that: Includes an extrusion strip (204) installed in the construction joint (4), and the extrusion end (2021) of the waterstop steel plate (202) is installed on the extrusion strip (204); It includes a pre-tightening mechanism connected to a water-stop steel plate (202). The pre-tightening mechanism drives the extrusion end (2021) to extrude the extrusion strip (204) so ​​that the extrusion strip (204) deforms and expands to seal the construction joint (4).

2. The construction joint waterproofing device as described in claim 1, characterized in that: An extrusion groove (2041) is provided on both sides of the extrusion strip (204). The extrusion groove (2041) is provided along the extension direction of the extrusion strip (204). A water-stop steel plate (202) is provided on both sides of the extrusion strip (204). The extrusion end (2021) of the water-stop steel plate (202) is correspondingly provided in the extrusion groove (2041).

3. The construction joint waterproofing device as described in claim 2, characterized in that: It includes a connecting steel plate (205), which extends along the direction of the waterstop steel plate (202), and the connecting steel plate (205) is fixedly connected to the waterstop steel plate (202); Includes a preload bolt (206) disposed between the connecting steel plates (205), one end of the preload bolt (206) being disposed on one of the connecting steel plates (205) by means of a nut, wherein the nut (207) is disposed on the side of the corresponding connecting steel plate (205) away from the preload bolt (206); The other end of the pre-tightening bolt (206) is fixedly mounted on another connecting steel plate (205).

4. The construction joint waterproofing device as described in claim 3, characterized in that: Pre-tightening bolts (206) are evenly distributed between the connecting steel plates (205) along the direction of the connecting steel plates (205).

5. The construction joint waterproofing device as described in any one of claims 1 to 4, characterized in that: It includes a sealant (203) disposed between water-stop steel plates (202) and an extrusion strip (204) disposed at the bottom of the sealant (203).

6. A construction joint waterproofing structure, comprising the construction joint waterproofing device as described in any one of claims 1 to 5, including a construction joint (4), characterized in that: It includes a water-swellable rubber strip (7), which is placed inside the construction joint (4) and below the extrusion strip (204). The top of the water-swellable rubber strip (7) is closely attached to the bottom of the extrusion strip (204).

7. The construction joint waterproofing structure as described in claim 6, characterized in that: Includes waterproof sealant (6), which is placed inside the construction joint (4), with the top of the waterproof sealant (6) and the bottom of the water-swellable adhesive strip (7) tightly attached.

8. The construction joint waterproofing structure as described in claim 7, characterized in that: Includes grout material (5), which is placed inside the construction joint (4) and below the waterproof sealant material (6).

9. The construction joint waterproofing structure as described in claim 8, characterized in that: Includes a centrally embedded waterstop (3), which is installed in the construction joint (4). The centrally embedded waterstop (3) is installed between the joint filler (5) and the waterproof sealant (6). The two sides of the centrally embedded waterstop (3) are respectively installed in the concrete (1) on both sides of the construction joint (4).

10. The construction joint waterproofing structure as described in any one of claims 6 to 9, characterized in that: The water-stop steel plate (202) is placed on the concrete (1) on both sides of the construction joint (4) through the bottom sealant (201).

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