Waterproof structure of building expansion joint
By using components such as L-shaped plates, sealing strips, and expansion bolts in building expansion joints, combined with waterproof layers and arc-shaped blocking plates, the problems of complex structures and difficult construction of traditional expansion joints are solved, achieving simplified construction and waterproofing effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI CHENGGONG CONSTRUCTION ENGINEERING CO LTD
- Filing Date
- 2026-05-06
- Publication Date
- 2026-06-26
AI Technical Summary
Traditional expansion joints are complex and difficult to construct, which affects construction efficiency.
The system uses components such as L-shaped plates, sealing strips, pressure plates, clamping strips, and expansion bolts, combined with a waterproof layer and an arc-shaped blocking plate, to form a sealed structure. The pressure plate is supported by multiple layers of polyurethane waterproof coating and a support plate to ensure installation stability and sealing.
It simplifies the construction process, reduces construction time, improves installation efficiency, effectively prevents water seepage, and ensures the sealing of building expansion joints.
Smart Images
Figure CN224412846U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building expansion joint technology, and in particular to a waterproof structure for building expansion joints. Background Technology
[0002] Expansion joints, also known as building expansion joints, are structural joints installed at appropriate locations along the construction joint direction of a building or structure to prevent cracks or damage caused by changes in climate temperature (thermal expansion and contraction). Expansion joints divide building components above the foundation, such as walls, floors, and roofs (except for wooden roofs), into two independent parts, allowing the building or structure to expand and contract horizontally along its length.
[0003] Traditional expansion joint structures are complex and difficult to construct, with complicated procedures, which affects the construction of expansion joints. Therefore, a waterproof structure for building expansion joints is proposed to solve the above problems. Utility Model Content
[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a waterproof structure for building expansion joints, which effectively solves the deficiencies of the prior art.
[0005] To achieve the above objectives, one embodiment of this utility model provides a waterproof structure for building expansion joints, comprising two building bodies, both of which are coated with a waterproof layer on their top surfaces. L-shaped plates are installed on the top surfaces of both waterproof layers, with the bottom ends of the two L-shaped plates extending into the gap between the two building bodies. A wavy expansion joint is installed at the bottom ends of both L-shaped plates. Sealing strips are installed on the top surfaces of both L-shaped plates, and pressure plates are installed on the top surfaces of both sealing strips. A clamping strip is installed on the top surface of each of the pressure plates, and multiple expansion bolts are installed on their surfaces. The bottom ends of the multiple expansion bolts penetrate the waterproof layer, sealing strips, and pressure plates, and enter the interior of the two building bodies. An arc-shaped blocking plate is interlocked between the far ends of the two pressure plates.
[0006] Preferred from any of the above options, the two waterproof layers are applied manually in multiple layers with a total thickness of 1.5-3mm. In this option, the two waterproof layers can be made of polyurethane waterproof coating. The application is done manually, requiring multiple layers with an interval of 8-12 hours between each layer to avoid cracking caused by excessive thickness in a single application. It is recommended that the thickness of a single layer be controlled at 0.5mm, and the total thickness after multiple applications should be ≥1.5mm. In areas with extreme climates or high waterproofing requirements, this can be increased to 2-3mm.
[0007] Preferably, one side of the top surface of each of the two L-shaped plates is provided with a limiting groove, and a support plate for supporting the pressure plate is installed inside each of the two limiting grooves. By using this solution, it is convenient to provide an installation position for the support plate, and after the pressure plate is installed, the support plate can provide stable support for the overhanging part of the pressure plate, so that the two pressure plates are installed horizontally, thereby providing stable support for the installation of the arc-shaped blocking plate.
[0008] Preferably, in any of the above solutions, a limiting strip is installed in the middle of the top surface of each of the two L-shaped plates, and the opposite sides of the two sealing strips abut against the sides of the two limiting strips respectively. This solution facilitates limiting the installation position of the two sealing strips. At the same time, the top surface of the two sealing strips is designed with openings to allow the top of the expansion bolts to pass through, which facilitates the clamping of the two pressure plates by the clamping strip, and to clamp the sealing strips and waterproof layer to prevent water leakage.
[0009] Preferably, in any of the above embodiments, vertical plates are installed at both ends of the telescopic plate, and a first slot is installed on the top surface of each of the two vertical plates. Both of the first slots are engaged with the bottom end of the L-shaped plate. This embodiment facilitates the connection between the two ends of the telescopic plate and the bottom end of the L-shaped plate. After installation, rivets or fasteners are used to fix the connection, thereby sealing the connection point. At the same time, the telescopic plate adopts a wave-like structure to compensate for the horizontal movement of the two building bodies through its own elongation or bending, while ensuring sealing and preventing water leakage. The telescopic plate is made of rubber, which is more flexible and convenient for elongation or bending.
[0010] Preferably, in any of the above solutions, a second slot is provided at both ends of the two pressure plates that are far apart. Both ends of the arc-shaped blocking plate are bent downward and engaged with the second slot. This solution facilitates the provision of an installation position for the arc-shaped blocking plate. During installation, adhesive needs to be applied to the inside of the second slot to seal the gap between the arc-shaped blocking plate and the second slot, thus preventing water seepage.
[0011] This utility model has the following advantages:
[0012] 1. This building expansion joint waterproof structure comprises two L-shaped plates, a sealing strip, a pressure plate, a clamping strip, and multiple expansion bolts. The expansion bolts penetrate the waterproof layer, the sealing strip, and the pressure plate, extending into the interior of the two building bodies. Tightening the expansion bolts facilitates the clamping strip's connection to the sealing strip and the waterproof layer. Simultaneously, an arc-shaped baffle plate is installed at the top of both pressure plates, forming a sealing structure between the two building bodies. The overall structure is simple, easy to install, and significantly reduces construction time, effectively solving the problems existing in current technologies.
[0013] 2. This building expansion joint waterproof structure uses two L-shaped plates, each with a limiting groove on both sides of its top surface. Support plates are installed inside each limiting groove. These two support plates provide stable support for the overhanging portion of the pressure plate, ensuring the two pressure plates are installed horizontally. The two pressure plates, each with a second slot at both ends, provide installation positions for the ends of the arc-shaped blocking plate, ensuring stable installation of the blocking plate, blocking the gap between the two L-shaped plates, and diverting rainwater to prevent seepage. Attached Figure Description
[0014] Figure 1 This is a cross-sectional view of the overall structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 3 This is a first-view structural diagram of the entire utility model;
[0017] Figure 4 This is a schematic diagram of the installation position of the expansion bolt of this utility model;
[0018] Figure 5 This is an exploded structural diagram of the telescopic plate and L-shaped plate of this utility model.
[0019] In the diagram: 1-Building body, 2-Expansion plate, 3-Support plate, 4-Pressure strip, 5-Sealing strip, 6-Arc-shaped baffle plate, 7-L-shaped plate, 8-Expansion bolt, 9-Pressure plate, 10-Waterproof layer, 11-Limiting strip, 12-Limiting groove, 13-First slot, 14-Vertical plate, 15-Second slot. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.
[0021] like Figures 1 to 5As shown, a waterproof structure for building expansion joints includes two building bodies 1, both of which are coated with a waterproof layer 10 on their top surfaces. L-shaped plates 7 are installed on the top surfaces of both waterproof layers 10. The bottom ends of the two L-shaped plates 7 enter the gap between the two building bodies 1. A wavy expansion plate 2 is installed at the bottom ends of both L-shaped plates 7. A sealing strip 5 is installed on the top surface of both L-shaped plates 7. A pressure plate 9 is installed on the top surface of both sealing strips 5. A clamping strip 4 is installed on the top surface of both pressure plates 9, and multiple expansion bolts 8 are installed on their surfaces. The bottom ends of the multiple expansion bolts 8 penetrate the waterproof layer 10, the sealing strip 5, and the pressure plate 9, and enter the interior of the two building bodies 1. An arc-shaped blocking plate 6 is installed between the far ends of the two pressure plates.
[0022] The two waterproof layers 10 are applied manually in multiple layers with a total thickness of 1.5-3mm. As an optional technical solution of this utility model, the material of the two waterproof layers 10 can be polyurethane waterproof coating. The coating is applied manually, requiring layer-by-layer application with an interval of 8-12 hours between each coat to avoid cracking caused by excessive thickness in a single coat. It is recommended that the thickness of a single coat be controlled at 0.5mm, and the total thickness after multiple coats should be ≥1.5mm. In areas with extreme climates or high waterproof requirements, it can be increased to 2-3mm.
[0023] Each of the two L-shaped plates 7 has a limiting groove 12 on one side of its top surface. Each limiting groove 12 has a support plate 3 installed inside to support the pressure plate 9. As an optional technical solution of this utility model, this facilitates the provision of an installation position for the support plate 3. After the pressure plate 9 is installed, the support plate 3 can stably support the overhanging part of the pressure plate 9, so that the two pressure plates 9 are installed horizontally, thereby providing stable support for the installation of the arc-shaped blocking plate 6.
[0024] Limiting strips 11 are installed in the middle of the top surface of the two L-shaped plates 7. The two sealing strips 5 are respectively abutted against the sides of the two limiting strips 11 on opposite sides. As an optional technical solution of this utility model, this makes it easy to limit the installation position of the two sealing strips 5. At the same time, the top surface of the two sealing strips 5 is designed with openings to allow the top of the expansion bolts 8 to pass through, so as to press the two pressure plates 9 with the pressing strips 4, and press the sealing strips 5 and the waterproof layer 10 to prevent water leakage.
[0025] Vertical plates 14 are installed at both ends of the telescopic plate 2. The top surface of each vertical plate 14 is equipped with a first slot 13, which is engaged with the bottom end of the L-shaped plate 7. As an optional technical solution of this utility model, this facilitates the connection between the two ends of the telescopic plate 2 and the bottom end of the L-shaped plate 7. After installation, rivets or fasteners are used to fix the connection, thereby sealing the connection position between the two. At the same time, the telescopic plate 2 adopts a wave structure to compensate for the horizontal movement of the two building bodies 1 through its own extension or bending, while ensuring sealing and preventing water leakage. The telescopic plate 2 is made of rubber, which is more flexible and convenient for extension or bending.
[0026] The two pressure plates 9 are provided with second slots 15 at their far ends. The two ends of the arc-shaped baffle plate 6 are bent downward and engaged with the second slots 15. As an optional technical solution of this utility model, this facilitates the provision of an installation position for the arc-shaped baffle plate 6. At the same time, during installation, adhesive needs to be applied to the inside of the second slots 15 to seal the gap between the arc-shaped baffle plate 6 and the second slots 15 and prevent water seepage.
[0027] This type of waterproof structure for building expansion joints requires the following steps when used:
[0028] 1) During installation, first apply the waterproof layer 10, applying it in multiple coats;
[0029] 2) Drill holes at certain locations on the building body 1 to provide installation positions for multiple expansion bolts 8;
[0030] 3) Place the assembly of L-shaped plate 7 and telescopic plate 2 in the gap between the two building bodies 1;
[0031] 4) Install the sealing strip 5, support plate 3, pressure plate 9 and clamping strip 4 in sequence, and drill holes in the above parts, so that the tops of multiple expansion bolts 8 pass through them;
[0032] 5) Tighten the nuts on the top of the multiple expansion bolts 8, and finally apply glue to the inside of the two second slots 15. At the same time, install the two ends of the arc-shaped baffle plate 6 inside the second slots 15.
[0033] In summary, during use, the system employs two L-shaped plates 7, a sealing strip 5, a pressure plate 9, a clamping strip 4, and multiple expansion bolts 8. These bolts 8 penetrate the waterproof layer 10, the sealing strip 5, and the pressure plate 9, extending into the interior of the two building bodies 1. Tightening the expansion bolts 8 facilitates the clamping strip 4 over the sealing strip 5 and the waterproof layer 10. Simultaneously, an arc-shaped baffle 6 is installed at the top of both pressure plates 9, forming a sealing structure between the two building bodies 1. The overall structure is simple, easy to install, and significantly reduces construction time, making it convenient for users. The installation and construction effectively solves the problems existing in the prior art. By setting two L-shaped plates 7, each with a limiting groove 12 on both sides of its top surface, and a support plate 3 installed inside each limiting groove 12, the two support plates 3 can stably support the overhanging part of the pressure plate 9, ensuring that the two pressure plates 9 are installed in a horizontal state. By setting two pressure plates 9, and having a second slot 15 at both ends of both, it is convenient to provide installation positions for both ends of the arc-shaped blocking plate 6, so that the blocking plate 6 can be installed stably, and the gap between the two L-shaped plates 7 can be blocked, and rainwater can be diverted to avoid water seepage.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A waterproof structure for building expansion joints, characterized in that: The system includes two building bodies (1), both of which are coated with a waterproof layer (10) on their top surfaces. L-shaped plates (7) are installed on the top surfaces of both waterproof layers (10). The bottom ends of the two L-shaped plates (7) enter the gap between the two building bodies (1). A wave-shaped telescopic plate (2) is installed on the bottom ends of the two L-shaped plates (7). A sealing strip (5) is installed on the top surface of both L-shaped plates (7). A pressure plate (9) is installed on the top surface of both sealing strips (5). A clamping strip (4) is installed on the top surface of both pressure plates (9). Multiple expansion bolts (8) are installed on their surfaces. The bottom ends of the multiple expansion bolts (8) penetrate the waterproof layer (10), sealing strip (5), and pressure plate (9) and enter the interior of the two building bodies (1). An arc-shaped blocking plate (6) is installed between the far ends of the two pressure plates (9).
2. The waterproof structure for building expansion joints according to claim 1, characterized in that: The two waterproof layers (10) are applied manually in multiple layers by brushing, with a total thickness of 1.5-3 mm.
3. The waterproof structure for building expansion joints according to claim 2, characterized in that: Each of the two L-shaped plates (7) has a limiting groove (12) on one side of its top surface, and a support plate (3) for supporting the pressure plate (9) is installed inside each of the two limiting grooves (12).
4. The waterproof structure for building expansion joints according to claim 3, characterized in that: Limiting strips (11) are installed in the middle of the top surface of the two L-shaped plates (7), and the two sealing strips (5) abut against the sides of the two limiting strips (11) respectively.
5. A waterproof structure for building expansion joints according to claim 4, characterized in that: Vertical plates (14) are installed at both ends of the telescopic plate (2), and first slots (13) are installed on the top surface of the two vertical plates (14). The two first slots (13) are engaged with the bottom end of the L-shaped plate (7).
6. A waterproof structure for building expansion joints according to claim 5, characterized in that: The two pressure plates (9) are provided with second slots (15) at their far ends. The two ends of the arc-shaped blocking plate (6) are bent downward and engaged with the second slots (15).