Reinforced deep and thick covering layer dam lower culvert pipe parting water stop structure
By adopting a reinforced culvert joint water stop structure in water conservancy projects with deep cover soft base, the excessive displacement and water seepage problems caused by traditional expansion joint design are solved, and higher stability and waterproof performance are achieved.
Patent Information
- Application Number
- CN202421872028.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-02
AI Technical Summary
Water conservancy projects on soft foundations on deep cover layers are stress fracture problems caused by uneven settlement of concrete structures. Traditional expansion joint designs are likely to cause excessive displacement, causing cracking and water seepage in the water stop structure.
The reinforced deep cover layer dam lower culvert pipe split-slit water stop structure is adopted, including two sections of culvert pipes connected by expansion joint structure. The expansion joint structure consists of polyurethane water stop material, copper water stop sheet, rubber water stop belt and closed-cell foam plate, and a bottom beam and rubber gasket are provided below.
The wide-slit design reserves displacement space to reduce structural stress and improve stability; the multiple water stop structure effectively prevents water leakage and ensures waterproof performance; the combination of bottom beams and rubber gaskets adapts to foundation deformation, protects the concrete structure, and improves overall performance.
Smart Images
Figure CN222961997U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of water conservancy projects, and relates to a reinforced split joint water stop structure for culverts under dams in deep overburden layers. Background Technique
[0002] With the booming development of China's economy, the construction of water conservancy projects on soft foundations of deep overburden layers is increasing day by day. However, the construction of water conservancy projects on deep soft foundations faces a series of complex and severe challenges. Among them, the stress fracture problem caused by uneven settlement of concrete structures is particularly prominent. To effectively address this problem, expansion joints are often designed in traditional projects to release stress and improve the deformation adaptability of water conservancy projects. However, the uneven deformation at the expansion joints often leads to excessive displacement of the expansion joints, which in turn causes the water stop structure to crack and leak. In severe cases, it may cause the gradual erosion of foundation soil particles, forming adverse geological phenomena such as depressions and collapse pits along the axis direction of water conservancy buildings, seriously threatening the seepage stability and safety of the entire water conservancy project. Content of the Utility Model
[0003] The purpose of the utility model is to provide a reinforced split joint water stop structure for culverts under dams in deep overburden layers, which solves the problem that the uneven deformation of the expansion joint in the prior art leads to excessive displacement of the expansion joint, and in turn causes the water stop structure to crack and leak.
[0004] The technical solution adopted by the utility model is that the reinforced split joint water stop structure for culverts under dams in deep overburden layers includes two sections of culverts, and the two culverts are connected through a split joint structure;
[0005] The split joint structure includes a polyurethane water stop material filled between the cross-sections of the two culverts. The polyurethane water stop material is located on one side close to the inner walls of the two culverts. The cross-sections of the two culverts are sequentially embedded with copper water stop sheets and rubber water stop belts from the inner wall to the outer wall. The two ends of the copper water stop sheets and rubber water stop belts are respectively buried in the pipe walls of the two sections of culverts. The remaining space of the split joint structure is filled with a closed-cell foam board;
[0006] A bottom cross beam is arranged below the split joint structure. The bottom cross beam is perpendicular to the extension direction of the culvert, and rubber gaskets are embedded on the contact surfaces between the two sections of culverts and the bottom cross beam.
[0007] The characteristics of the utility model also lie in:
[0008] The width of the split joint structure is 2 cm to 4 cm.
[0009] The polyurethane water stop material occupies 20% to 40% of the entire culvert wall thickness, and the length should not be less than 10 cm.
[0010] The distance between the copper water stop sheet and the inner wall of the culvert is 15 cm to 30 cm.
[0011] The red copper water stop is a W-shaped copper water stop.
[0012] The distance between the rubber water stop and the red copper water stop is not less than 20 cm.
[0013] The rubber water stop is a 651-type rubber water stop.
[0014] The cross-section of the bottom beam is an isosceles trapezoid, and the height-width ratio of the isosceles trapezoid is 1:1 to 1:2. The bottom surface of the bottom beam is in contact with the rubber gasket, and the midline of the cross-section of the bottom beam is located between the joints of the two culverts.
[0015] The width of the rubber gasket should exceed the bottom width of the bottom beam by 10% to 20% on both sides, and at the same time, the width of the rubber gasket is not less than 10 times the width of the expansion joint structure.
[0016] The beneficial effects of the present utility model are as follows:
[0017] 1. Through the wide joint design of the expansion joint structure, the present utility model reserves sufficient displacement space between the two culverts, prevents the structural stress between adjacent culverts from being too large and causing damage to the culverts, and improves the overall stability of the culvert structure.
[0018] 2. Through the multiple water stop structure composed of polyurethane water stop material, red copper water stop and rubber water stop, the present utility model can effectively prevent water from leaking through the expansion joint and ensure the waterproof performance of the culvert structure.
[0019] 3. Through the combined application of the bottom beam and the rubber gasket, the present utility model can better adapt to the deformation of the foundation, protect the concrete structure of the culvert, and at the same time can absorb a certain amount of structural displacement, improving the overall performance of the culvert structure. Description of the Drawings
[0020] Figure 1 is a schematic structural diagram of the enhanced deep overburden dam bottom culvert joint water stop structure of the present utility model;
[0021] Figure 2 is Figure 1 the enlarged structural diagram at A in
[0022] In the figure: 1, culvert; 2, expansion joint structure; 21, polyurethane water stop material; 22, red copper water stop; 23, rubber water stop; 24, closed-cell foam board; 3, bottom beam; 4, rubber gasket. Detailed Embodiments
[0023] The present utility model will be described in detail below in conjunction with the drawings and specific embodiments.
[0024] Embodiment 1:
[0025] AsFigure 1 and Figure 2 As shown in Figure 2 , it includes two sections of culverts 1, and the two culverts 1 are connected by an expansion joint structure 2. The expansion joint structure can more effectively absorb the deformation at the expansion joint position, reduce the cracking and leakage problems of the expansion joint caused by the foundation deformation, and improve the overall stability of the culvert structure.
[0026] As Figure 2 shown in Figure 2 , the expansion joint structure 2 includes a polyurethane water stop material 21 filled between the cross-sections of the two culverts 1. The polyurethane water stop material 21 is located on one side close to the inner walls of the two culverts 1. The cross-sections of the two culverts 1 are inlaid with copper water stop sheets 22 and rubber water stop belts 23 in sequence from the inner wall to the outer wall. The two ends of the copper water stop sheets 22 and the rubber water stop belts 23 are respectively buried into the pipe walls of the two sections of culverts 1. The remaining space in the expansion joint structure 2 is filled with closed-cell foam boards 24. This design enhances the ability of the expansion joint structure 2 to absorb structural deformation, effectively reduces the risk of structural stress exceeding the standard caused by excessive uneven settlement of the foundation, and improves the overall stability of the culvert structure.
[0027] The arrangement of the polyurethane water stop material 21, the copper water stop sheets 22 and the rubber water stop belts 23 forms a three-way water stop structure. The design of the multiple water stop structures can effectively prevent water from leaking through the expansion joint and ensure the waterproof performance of the culvert structure.
[0028] As Figure 1 and Figure 2 shown in Figure 2 , a bottom cross beam 3 is arranged below the expansion joint structure 2. The bottom cross beam 3 is perpendicular to the extension direction of the culvert 1. Rubber gaskets 4 are inlaid on the contact surfaces of the two sections of culverts 1 and the bottom cross beam 3.
[0029] Embodiment Two:
[0030] Based on Embodiment One:
[0031] As Figure 2 shown in Figure 2 , the width of the expansion joint structure 2 is 2 cm to 4 cm.
[0032] As Figure 2 shown in Figure 2 , the polyurethane water stop material 21 occupies 20% to 40% of the entire wall thickness of the culvert 1, and the length should not be less than 10 cm. As the first auxiliary water stop structure, the polyurethane water stop material 21 can effectively prevent water leakage.
[0033] As Figure 2 shown in Figure 2 , the distance between the copper water stop sheet 22 and the water-facing surface of the culvert is 15 cm to 30 cm. The copper water stop sheet 22 is a W-shaped copper water stop sheet. As the second water stop structure, the excellent corrosion resistance and water stop performance of the copper water stop sheet 22 further enhance the waterproof effect. At the same time, the W-shaped copper water stop sheet has a certain tensile and shock-proof ability, and the reliability is high.
[0034] The distance between the rubber waterstop 23 and the copper waterstop 22 is not less than 20 cm. The rubber waterstop 23 is a 651-type rubber waterstop. As the third waterstop structure, it has good elasticity and is resistant to aging, can maintain excellent waterstop performance for a long time, and maintain the long-term and stable operation of the waterstop structure.
[0035] Embodiment 3:
[0036] Based on Embodiment 1:
[0037] As Figure 2 shown, the cross-section of the bottom beam 3 is an isosceles trapezoid, and the height-width ratio of the isosceles trapezoid is between 1:1 and 1:2. The bottom surface of the bottom beam 3 contacts the rubber gasket 4. The midline of the cross-section of the bottom beam 3 is located between the joints of the two culverts 1. The inverted trapezoid structure can make the bottom beam 3 fully contact with the joints of the culverts 1, ensuring that the bottom beam 3 can play a good absorption effect when the foundation deforms.
[0038] As Figure 2 shown, the width of the rubber gasket 4 should exceed the bottom width of the bottom beam 3 by 10% - 20% on each side. At the same time, the unilateral width of the rubber gasket 4 is not less than 5 times the width of the expansion joint structure 2. The setting of the rubber gasket 4 can, on the one hand, serve as an auxiliary anti-seepage measure to further reduce the water leakage problem of the expansion joint, and on the other hand, as the contact material between the bottom beam 3 and the concrete structure of the culvert 1, it can absorb a certain amount of structural displacement and improve the overall performance of the culvert structure.
[0039] The bottom beam 3 is made of low-grade concrete. The grade of the low-grade concrete is at least 1 level lower than that of the concrete used for the culvert 1, and it is not less than C15. Low-grade concrete is more likely to deform compared to high-grade concrete. When the foundation deforms, the bottom beam 3 can absorb the displacement caused by the foundation deformation by deforming itself first, to protect the stable operation of the culvert structure. However, when the concrete grade is too low, the bottom beam 3 cannot bear the weight of the structure itself, thus losing the protection effect.
[0040] The working principle of the present utility model:
[0041] When the structure encounters foundation deformation during operation, the bottom beam 3 first absorbs part of the impact force through its own deformation, and then the rubber gasket 4 can absorb the excess impact force to protect the concrete structure of the culvert 1. When the foundation deforms too much and structural displacement occurs between the two culverts 1, due to the wide joint design of the expansion joint structure 2, there is sufficient displacement space between the two culverts 1 to prevent damage to the culvert 1 caused by excessive structural stress. At the same time, the waterstop structure composed of the polyurethane waterstop material 21, the copper waterstop 22 and the rubber waterstop 23 can deform itself to a certain extent when structural displacement occurs between the two culverts 1, preventing water leakage.
Claims
1. The reinforced deep overburden dam culvert split-joint water-stopping structure is characterized by: Comprising two sections of culvert (1), the two sections of culvert (1) being connected via an expansion joint structure (2); The expansion joint structure (2) comprises a polyurethane water-stopping material (21) filled between the cross sections of the two culverts (1), the polyurethane water-stopping material (21) being filled close to the inner wall sides of the two culverts (1), the cross sections of the two culverts (1) being embedded with copper water-stopping sheets (22) and rubber water-stopping strips (23) in sequence from the inner wall to the outer wall, the two ends of the copper water-stopping sheets (22) and the rubber water-stopping strips (23) being respectively embedded in the walls of the two sections of the culverts (1), and the remaining space of the expansion joint structure (2) being filled with a closed-cell foam board (24); A bottom cross beam (3) is provided below the expansion joint structure (2), the bottom cross beam (3) is perpendicular to the extension direction of the culvert (1), and a rubber gasket (4) is embedded on the contact surface between the two sections of the culvert (1) and the bottom cross beam (3); The width of the expansion joint structure (2) is 2 cm to 4 cm; The cross section of the bottom cross beam (3) is an isosceles trapezoid, the height-to-width ratio of the isosceles trapezoid is 1:1-1:2, the bottom surface of the bottom cross beam (3) is in contact with the rubber gasket (4), and the center line of the cross section of the bottom cross beam (3) is located between the connection points of the two culverts (1); The width of the rubber gasket (4) exceeds the bottom width of the bottom crossbeam (3) by 10% to 20% on both sides, and the width of the rubber gasket (4) is not less than 10 times the width of the expansion joint structure (2); The bottom cross beam (3) is made of low-grade concrete, the grade of which is at least one grade lower than that of the concrete used in the culvert (1), and should not be lower than C15.
2. The reinforced deep overburden dam culvert joint water-stopping structure according to claim 1 is characterized in that: The polyurethane waterproof material (21) occupies 20% to 40% of the wall thickness of the entire culvert (1) and has a length of not less than 10 cm.
3. The reinforced deep overburden dam culvert joint water-stopping structure according to claim 1 is characterized in that: The distance between the copper water stop sheet (22) and the inner wall of the culvert (1) is 15 cm to 30 cm.
4. The reinforced deep overburden dam culvert joint water-stopping structure according to claim 1 is characterized in that: The copper water stop plate (22) is a W-shaped copper water stop plate.
5. The reinforced deep overburden dam culvert joint water-stopping structure according to claim 1 is characterized in that: The distance between the rubber water stop strip (23) and the copper water stop sheet (22) is not less than 20 cm.
6. The reinforced deep overburden dam culvert joint water-stopping structure according to claim 1 is characterized in that: The rubber waterstop (23) is a 651 type rubber waterstop.