Seepage-proof sealing water stop structure of expansion joint
By adopting a structural system of elastic cover plate + surface closure in the expansion joint, the problem of poor durability of the existing expansion joint repair methods is solved, efficient sealing and durability are achieved, and repair costs and impact are reduced.
Patent Information
- Application Number
- CN202421622716.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The existing expansion joint repair methods have poor durability, and the average repair cycle is 3-5 years, and the cost of each repair is high. It also affects the normal power generation of hydropower stations and has poor economic benefits.
A structural system with elastic cover plate + surface sealing is adopted, including elastic sealing layer I located in the lower layer of the expansion joint and elastic sealing layer II on the upper layer. The cross-section of the elastic sealing layer II is T-shaped, and an elastic barb is provided at the lower part, which is bonded to the concrete base surface through the adhesive layer, and a surface sealing layer is set to achieve double anti-seepage effect.
It realizes effective sealing of expansion joints, improves durability and anti-seepage effect, reduces repair cycle and cost, and improves the normal operation and economic benefits of hydropower stations.
Smart Images
Figure CN222908696U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of anti-seepage of building expansion joints, in particular to an anti-seepage, sealing and water-stopping structure for expansion joints. Background Technique
[0002] The anti-seepage of building expansion joints is a common problem in the current field of building construction. Especially for hydraulic structures, after long-term operation of hydraulic structures, leakage, damage and other situations will occur in the expansion joints, affecting the operation and structural safety of the buildings. The existing anti-seepage repair methods for structural joints have poor durability, with an average repair cycle of 3 - 5 years, high repair cost each time, and at the same time affecting the normal power generation of hydropower stations, resulting in poor economic benefits.
[0003] Most of the existing expansion joint repair methods only use anti-seepage materials to plug the joints, with a single form. Moreover, due to the normal expansion and contraction of the expansion joints, the durability of the anti-seepage materials is affected to a certain extent, making the anti-seepage system unable to continuously achieve the anti-seepage effect. Summary of the Invention
[0004] The purpose of the utility model is to overcome the deficiencies of the prior art, and provide an anti-seepage, sealing and water-stopping structure for expansion joints. The sealing and water-stopping structure is reasonably designed, adopts an elastic cover plate + surface sealing structure system, has good anti-seepage effect, good durability and strong practicability.
[0005] The present invention is implemented by the following measures: an anti-seepage, sealing and water-stopping structure for expansion joints, including an elastic sealing layer arranged in the expansion joint. The elastic sealing layer includes an elastic sealing layer I located in the lower layer of the expansion joint and an elastic sealing layer II located in the upper layer of the expansion joint. The elastic sealing layer II is of a cover plate type structure, the cross-section of the elastic sealing layer II is T-shaped, the lower part of the elastic sealing layer II extends into the expansion joint, and elastic barbs are arranged on both sides of the lower part. The upper part of the elastic sealing layer II is located on both sides of the expansion joint and is bonded to the concrete base surface on both sides of the expansion joint through an adhesive layer I. Sealing grooves matching the elastic sealing layer II are arranged on both sides of the expansion joint, and a surface sealing layer is arranged on the upper surface of the elastic sealing layer II.
[0006] Preferably, the width of the surface sealing layer is greater than the width of the elastic sealing layer II, and the surface sealing layer is a polyurea layer.
[0007] Preferably, an activation layer and an adhesive layer II are arranged on the surface of the elastic sealing layer II, and the surface sealing layer is located on the surface of the adhesive layer.
[0008] Preferably, a polyurethane bottom layer and an epoxy bottom layer are arranged between the surface sealing layer and the concrete base surface on both sides of the expansion joint.
[0009] Preferably, inverted triangular smooth connection grooves are arranged on the concrete base surface at both edges of the surface sealing layer.
[0010] Preferably, an epoxy mortar connection layer is provided in the inverted triangle connection groove. The epoxy mortar connection layer is located outside the surface sealing layer, and the surface of the epoxy mortar connection layer is on the same plane as the concrete base surface.
[0011] Preferably, the elastic sealing layer I is a PVC rod, two-component polysulfide sealant, rubber strip or foam board.
[0012] Preferably, the lower width of the elastic sealing layer II is smaller than the width of the expansion joint, and the distance between the two elastic barbs on both sides matches the width of the expansion joint.
[0013] Preferably, the lower cross-section of the elastic sealing layer II is a hollow "8" shape.
[0014] The beneficial effects of the present invention are as follows: The present utility model discloses an expansion joint anti-seepage and sealing water-stopping structure. This sealing water-stopping structure is novel and reasonably designed. It adopts a structural system of elastic cover plate + surface sealing. The elastic sealing layer I is arranged in the expansion joint for preliminary anti-seepage. The cross-section of the elastic sealing layer II is T-shaped, which plays a role of covering and sealing the overall expansion joint. The surface sealing layer seals the structural joint and the concrete on both sides thereof, achieving a double anti-seepage effect and having strong practicability. Description of the Drawings
[0015] Figure 1 It is a cross-sectional schematic diagram of the present utility model.
[0016] Figure 2 is Figure 1 partial enlarged view of.
[0017] In the figure: 1 - elastic sealing layer I, 2 - elastic sealing layer II, 3 - elastic barb, 4 - adhesive layer I, 5 - sealing groove, 6 - surface sealing layer, 7 - activation layer, 8 - adhesive layer II, 9 - polyurethane bottom layer, 10 - epoxy bottom layer, 11 - inverted triangle connection groove, 12 - epoxy mortar connection layer. Detailed Embodiments
[0018] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific embodiments.
[0019] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the content disclosed below.
[0020] The following combines Figure 1 and Figure 2The technical solution of the present utility model will be further described.
[0021] The first embodiment is as follows Figure 1 and Figure 2 shown: A waterproof and sealing structure for expansion joints, which includes: an elastic sealing layer arranged in the expansion joint. The elastic sealing layer includes an elastic sealing layer I 1 located in the lower layer of the expansion joint and an elastic sealing layer II 2 located in the upper layer of the expansion joint. The elastic sealing layer I 1 is a PVC rod, two-component polysulfide sealant, rubber strip or foam board. The elastic sealing layer I 1 has a certain elasticity and fills the inside of the expansion joint, that is, it plays an effect of initially sealing the expansion joint. The elastic sealing layer II 2 is a cover plate structure. The cross-section of the elastic sealing layer II 2 is T-shaped. The lower part of the elastic sealing layer II 2 extends into the expansion joint, and elastic barbs 3 are arranged on both sides of the lower part. The width of the lower part of the elastic sealing layer II 2 is smaller than the width of the expansion joint, making it more convenient to install the lower part of the elastic sealing layer II 2 into the expansion joint. The distance between the two elastic barbs 3 on both sides matches the width of the expansion joint, making the lower part of the elastic sealing layer II 2 closely installed with the expansion joint. The cross-section of the lower part of the elastic sealing layer II 2 is a hollow "8" shape, so that the lower part of the elastic sealing layer II 2 has an extrusion elastic space and the sealing is more tight. The upper part of the elastic sealing layer II 2 is located on both sides of the expansion joint and is bonded to the concrete base surface on both sides of the expansion joint through an adhesive layer I 4. The adhesive layer I 4 is uncured butyl rubber, which has good adhesion performance, making the wing plates on both sides of the elastic sealing layer II 2 closely adhered to both sides of the expansion joint. Sealing grooves 5 matching the elastic sealing layer II 2 are arranged on both sides of the expansion joint, so that the surface of the elastic sealing layer II 2 is on the same horizontal plane as the concrete surface. A surface sealing layer 6 is arranged on the upper surface of the elastic sealing layer II 2. The width of the surface sealing layer 6 is greater than the width of the elastic sealing layer II 2. The surface sealing layer 6 is a polyurea layer. An activation layer 7 and an adhesive layer II 8 are arranged on the surface of the elastic sealing layer II 2. The surface sealing layer 6 is located on the surface of the adhesive layer II 8. The activation layer 7 and the adhesive layer II 8 make the surface of the elastic sealing layer II 2 closely combined with the surface sealing layer 6, avoiding phenomena such as bulging and delamination. A polyurethane bottom layer 9 and an epoxy bottom layer 10 are arranged between the surface sealing layer 6 and the concrete base surface on both sides of the expansion joint. The polyurethane bottom layer 9 and the epoxy bottom layer 10 improve the bonding strength between the concrete base surface and the surface sealing layer 6. Inverted triangular connecting grooves 11 are arranged on the concrete base surface at the two side edges of the surface sealing layer 6. An epoxy mortar connecting layer 12 is arranged in the inverted triangular connecting grooves 11. The epoxy mortar connecting layer 12 is located outside the surface sealing layer 6. The surface of the epoxy mortar connecting layer 12 is on the same plane as the concrete base surface, improving the overall waterproof and sealing effect and having strong practicability.
[0022] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. An expansion joint anti-seepage sealing and water-stopping structure, comprising an expansion joint, characterized in that: The elastic sealing layer arranged in the expansion joint comprises an elastic sealing layer I located in the lower layer of the expansion joint and an elastic sealing layer II located in the upper layer of the expansion joint. The elastic sealing layer II is a cover plate structure. The cross section of the elastic sealing layer II is T-shaped. The lower part of the elastic sealing layer II extends into the expansion joint, and elastic barbs are arranged on both sides of the lower part. The upper part of the elastic sealing layer II is located on both sides of the expansion joint and is bonded to the concrete base surfaces on both sides of the expansion joint through the adhesive layer I. Sealing grooves matching the elastic sealing layer II are arranged on both sides of the expansion joint, and a surface sealing layer is arranged on the upper surface of the elastic sealing layer II.
2. The expansion joint anti-seepage sealing and water-stopping structure according to claim 1, characterized in that: The width of the surface sealing layer is greater than the width of the elastic sealing layer II, and the surface sealing layer is a polyurea layer.
3. The expansion joint anti-seepage sealing and water-stopping structure according to claim 2, characterized in that: The surface of the elastic sealing layer II is provided with an activation layer and an adhesive layer II, and the surface sealing layer is located on the surface of the adhesive layer.
4. The expansion joint anti-seepage sealing and water-stopping structure according to claim 2, characterized in that: A polyurethane bottom layer and an epoxy bottom layer are arranged between the surface sealing layer and the concrete base surfaces on both sides of the expansion joint.
5. The expansion joint anti-seepage sealing and water-stopping structure according to claim 1, characterized in that: Inverted triangular connecting grooves are arranged on the concrete base surface at the edges of both sides of the surface sealing layer.
6. The expansion joint anti-seepage sealing and water-stopping structure according to claim 5, characterized in that: An epoxy mortar joining layer is arranged in the inverted triangle joining groove, the epoxy mortar joining layer is located outside the surface sealing layer, and the surface of the epoxy mortar joining layer is in the same plane as the concrete base surface.
7. The expansion joint anti-seepage sealing and water-stopping structure according to claim 1, characterized in that: The elastic sealing layer I is a PVC rod, a two-component polysulfide sealant, a rubber strip or a foam board.
8. The expansion joint anti-seepage sealing and water-stopping structure according to claim 1, characterized in that: The lower width of the elastic sealing layer II is smaller than the width of the expansion joint, and the spacing between the elastic barbs on both sides matches the width of the expansion joint.
9. The expansion joint anti-seepage sealing and water-stopping structure according to claim 8, characterized in that: The lower cross section of the elastic sealing layer II is a hollow "8" shape.