Composite water stop system of impermeable plate

Abstract

The utility model relates to a composite water stop system of an anti-seepage plate, which is used for mounting and water stop of the anti-seepage plate on a foundation and comprises a plurality of layers of composite foundations. The multi-layer composite foundation comprises a lower-layer water stop steel plate arranged on the foundation, a middle flexible water stop layer arranged on the upper surface of the lower-layer water stop steel plate and an upper-layer water stop steel plate arranged on the upper surface of the middle flexible water stop layer. The middle flexible water stopping layer is fixedly connected and tightly attached to the lower-layer water stopping steel plate and the upper-layer water stopping steel plate, the lower-layer water stopping steel plate is directly or indirectly fixed to a foundation, and the anti-seepage plate is fixedly installed on the upper surface of the upper-layer water stopping steel plate. A gap water stop structure for sealing a gap between the upper surface of the upper-layer water stop steel plate and the anti-seepage plate is arranged on the upper surface of the upper-layer water stop steel plate, the thickness of the lower-layer water stop steel plate is larger than or equal to 3 mm, the thickness of the lower-layer water stop steel plate is larger than or equal to 5 mm, and the thickness of the middle flexible water stop layer is 10-30 mm.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy and seepage prevention technology, specifically to a composite water-stopping system using seepage prevention boards. Background Technology

[0002] In karst regions, reservoir projects face complex geological challenges, including: 1. Karst development characteristics: soluble rock layers such as limestone and shale are widely distributed, and caves, sinkholes, and underground river systems are densely developed. Taking typical karst reservoirs in Guizhou, Yunnan, and Chongqing as examples, the cave rate can reach 15 per km². 2 In some areas, even underground river networks have formed. 2. Fissures and seepage channels: Tectonic movements have led to the widespread distribution of faults and joints, allowing groundwater to dissolve along fissures and form interconnected seepage channels. 3. Foundation differences: Within the same area, there is often an alternating distribution of rock foundations and soft, loose foundations, with localized exposed boulders, resulting in abrupt changes in foundation stiffness. The construction of the joints of the seepage-proof panels is crucial, affecting the stability of the entire reservoir area. Under these geological conditions, the joints of the seepage-proof panels are prone to structural cracking due to inconsistent foundation deformation, becoming key weak points for leakage.

[0003] In karst areas, the traditional single-material anti-seepage board joint sealing technology has the following problems: (1) When using a single flexible sealing material, the deformation difference between rigid rock and flexible rubber in the foundation is significant, which can easily lead to tearing or displacement of the sealing strip. When using a single rigid sealing material, it is difficult to adapt to soil settlement (settlement can reach 10-20mm) in soft foundations, and the weld is prone to stress concentration and cracking; (2) Protection failure in areas of geological abrupt change: When isolated rocks are exposed or at the junction of soft and hard foundations, the traditional single sealing structure cannot meet the requirements of rigidity and flexibility, forming weak points of leakage; (3) Insufficient redundancy: Once the single-layer sealing system fails, it will cause systemic leakage. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the technical problem to be solved by this utility model is to provide a composite water-stopping system of seepage-proof board, which has multiple water-stopping functions, combines rigidity and flexibility, and can be well applied to the seepage-proofing and water-stopping needs of various foundations.

[0005] To achieve the above objectives, this utility model provides a composite water-stopping system for a seepage-proof board, used for the installation and water-stopping of the seepage-proof board on a foundation. The system includes a multi-layer composite foundation, comprising a lower water-stopping steel plate disposed on the foundation, an intermediate flexible water-stopping layer disposed on the upper surface of the lower water-stopping steel plate, and an upper water-stopping steel plate disposed on the upper surface of the intermediate flexible water-stopping layer. The intermediate flexible water-stopping layer is fixedly connected to and tightly fitted to both the lower and upper water-stopping steel plates. The lower water-stopping steel plate is directly or indirectly fixed to the foundation. The seepage-proof board is fixedly installed on the upper surface of the upper water-stopping steel plate, and a gap-stopping structure is provided on the upper surface of the upper water-stopping steel plate to seal the gap between the upper surface of the upper water-stopping steel plate and the seepage-proof board. The thickness of the lower water-stopping steel plate is greater than or equal to 3mm, the thickness of the intermediate flexible water-stopping layer is greater than or equal to 5mm, and the thickness of the intermediate flexible water-stopping layer is 10–30mm.

[0006] Furthermore, the lower waterstop steel plate and the intermediate flexible waterstop layer, as well as the intermediate flexible waterstop layer and the upper waterstop steel plate, are all heat-fused and bonded together.

[0007] Furthermore, a limiting structure is provided between the lower waterstop steel plate and the intermediate flexible waterstop layer to restrict their relative sliding, and a limiting structure is also provided between the intermediate flexible waterstop layer and the upper waterstop steel plate to restrict their relative sliding.

[0008] Furthermore, the limiting structure between the lower waterstop steel plate and the intermediate flexible waterstop layer includes a limiting groove provided on the upper surface of the lower waterstop steel plate and a limiting protrusion fixedly provided on the lower surface of the intermediate flexible waterstop layer and embedded in the limiting groove.

[0009] Furthermore, the upper surface of the upper water-stop steel plate is coated with an epoxy resin anti-seepage coating.

[0010] Furthermore, the intermediate flexible waterstop layer is made of EPDM rubber.

[0011] Furthermore, the compression rate of the intermediate flexible waterstop layer is 20% to 30%.

[0012] Furthermore, the upper water-stop steel plate is welded and fixed to the anti-seepage plate.

[0013] Furthermore, the impermeable panels are spliced ​​together with an assembly gap between the sides of the two panels. The assembly gap also includes a gap-filling connection structure, comprising a sealant, a connecting plate, a water-swellable adhesive strip, and a waterproofing material. The sealant fills the assembly gap. The connecting plate is embedded in the sides of the impermeable panels on both sides of the assembly gap and is located below the upper surface of the sealant. The water-swellable adhesive strip is located in the gap filler and is positioned above the sealant. The water-swellable adhesive strip is in close contact with the sides of the impermeable panels on both sides of the assembly gap. The waterproofing material fills the assembly gap and is positioned above the water-swellable adhesive strip.

[0014] Furthermore, the gap-filling connection structure also includes a caulking and leveling material that fills the assembly gap and is located on the upper side of the waterproof material.

[0015] As described above, the composite water-stopping system of this utility model has the following beneficial effects:

[0016] 1. By setting up a multi-layer composite foundation consisting of a lower water-stop steel plate, an intermediate flexible water-stop layer, and an upper water-stop steel plate, the foundation for the installation and water-stopping of the seepage-proof board on the foundation is set up, which plays a triple water-stopping role. The multi-layer composite foundation has both rigidity and flexibility, and can adapt to the seepage-proofing and water-stopping needs of various foundations such as rock foundations, soft foundations, and areas with abrupt geological changes. In particular, it can be used for situations that include multiple types of foundations.

[0017] 2. By setting a gap-filling connection structure in the assembly gap between the seepage-proof boards, and by utilizing the combined work of sealant, connecting plate, water-swellable adhesive strip and waterproof material, water can be effectively prevented from seeping into the gap, thus improving the water-stopping performance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the composite water-stopping system of this utility model.

[0019] Figure 2 This is a schematic diagram of the limiting structure between the intermediate flexible waterstop layer and the lower waterstop steel plate in this utility model.

[0020] Figure 3 This is a schematic diagram of the gap-filling connection structure in this utility model.

[0021] Explanation of icon numbers

[0022] 1. Foundation

[0023] 2. Waterproof board

[0024] 3. Lower layer waterstop steel plate

[0025] 31 Limiting Groove

[0026] 4. Intermediate flexible waterstop layer

[0027] 41 Limiting protrusion

[0028] 5. Upper layer waterstop steel plate

[0029] 6. Grout material

[0030] 7 Connecting plate

[0031] 8. Water-swellable rubber strips

[0032] 9. Waterproof materials

[0033] 10. Joint filling and leveling materials Detailed Implementation

[0034] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0035] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0036] See Figures 1 to 3This utility model provides a composite water-stopping system for a seepage-proof board in a karst area, used for the installation and water-stopping of the seepage-proof board 2 on a foundation 1. The system includes a multi-layer composite foundation, comprising a lower water-stopping steel plate 3 on the foundation 1, an intermediate flexible water-stopping layer 4 on the upper surface of the lower water-stopping steel plate 3, and an upper water-stopping steel plate 5 on the upper surface of the intermediate flexible water-stopping layer 4. The intermediate flexible water-stopping layer 4 is fixedly connected to both the lower water-stopping steel plate 3 and the upper water-stopping steel plate 5. The lower water-stopping steel plate 3 is directly or indirectly fixed to the foundation 1. The seepage-proof board 2 is fixedly installed on the upper surface of the upper water-stopping steel plate 5. A gap-stopping structure is provided on the upper surface of the upper water-stopping steel plate 5 to seal the gap between the upper surface of the upper water-stopping steel plate 5 and the seepage-proof board 2. The thickness of the lower water-stopping steel plate 3 is greater than or equal to 3mm, the thickness of the intermediate flexible water-stopping layer 4 is greater than or equal to 5mm, and the thickness of the intermediate flexible water-stopping layer 4 is 10-30mm.

[0037] This utility model's composite water-stopping system can be used on rock foundations 1 and single soft soil foundations 1, and is also applicable to foundations 1 with abrupt changes in strata and exposed boulders. The lower water-stopping steel plate 3, the middle flexible water-stopping layer 4, and the upper water-stopping steel plate 5 constitute a three-layer composite structure, serving as the installation water-stopping base for the bottom of the seepage-proof board 2. The middle flexible water-stopping layer 4 is made of elastic material and has suitable elastic properties, thus possessing a certain ability to compensate for deformation. The middle flexible water-stopping layer 4 is in close contact with both the lower water-stopping steel plate 3 and the upper water-stopping steel plate 5, providing excellent water-stopping performance. The upper water-stopping steel plate 5 is used for fixed connection with the seepage-proof board 2, achieving fixed installation of the seepage-proof board 2 on the foundation 1. In the rock foundation 1, the lower water-stop steel plate 3 can be rigidly anchored to the rock mass. Specifically, it can be directly fixed to stable rock strata. In areas with abrupt changes in strata or uneven rock formations, concrete can be poured below the lower water-stop steel plate 3 to fill the gaps between boulders and bedrock, forming a concrete cushion layer. The lower water-stop steel plate 3 is then indirectly fixed to the rock foundation 1 by anchoring it to the concrete cushion layer. In the rock foundation 1, the intermediate flexible water-stop layer 4 can absorb the expansion deformation of micro-cracks in the rock mass. In the soft foundation 1, the upper water-stop steel plate 5 and the seepage-proof plate 2 settle together, and the intermediate flexible water-stop layer 4 releases stress through shear deformation. The intermediate flexible waterstop layer 4 and the upper waterstop steel plate 5 constitute a three-layer waterstop. The gap waterstop structure on the surface of the upper waterstop steel plate 5 can prevent water from seeping into the gap between the seepage prevention plate 2 and the upper waterstop steel plate 5. When the upper waterstop steel plate 5 is damaged and fails to stop the water, the intermediate flexible waterstop layer 4 and the lower waterstop steel plate 3 can still achieve the waterstop effect, improving redundancy. The lower waterstop steel plate 3 and the upper waterstop steel plate 5 have good pressure bearing and wear resistance, which can protect the intermediate flexible waterstop layer 4 from damage and enable the intermediate flexible waterstop layer 4 to bear the stress evenly. The entire multi-layer composite foundation has both rigidity and flexibility requirements, and can adapt to the seepage prevention and waterstop needs of various foundations 1, such as rock foundations 1, soft foundations 1, and geological abrupt change zones. In particular, it can be used in complex karst areas that contain multiple types of foundations 1.

[0038] See Figures 1 to 3 The present invention will be further described below with reference to a specific embodiment:

[0039] In this embodiment, see Figure 1 As a preferred design, the lower waterstop steel plate 3 is provided with anchoring holes. During installation, the lower waterstop steel plate 3 is anchored to the foundation 1 by passing anchor rods through the anchoring holes. Specifically, the anchor rods are inserted into the rock mass or into the concrete cushion layer on the foundation 1, and the anchoring depth of the anchor rods is ≥500mm. The lower waterstop steel plate 3 is preferably made of Q355B corrosion-resistant steel plate with a thickness ≥5mm.

[0040] In this embodiment, see Figure 1As a preferred design, the intermediate flexible waterstop layer 4 is made of ethylene propylene diene monomer (EPDM) rubber, with a compression ratio that meets the specific requirements. Preferably, the compression ratio is controlled at 20%–30% to better compensate for deformation. Before installation, the intermediate flexible waterstop layer 4 needs to undergo a 48-hour immersion expansion test, with a volume change rate ≤5%. Other suitable materials can also be used for the intermediate flexible waterstop layer 4.

[0041] In this embodiment, see Figure 1 As a preferred design, the upper waterstop steel plate 5 is also made of Q355B corrosion-resistant steel plate with a thickness of ≥3mm. The upper surface of the upper waterstop steel plate 5 can be coated with an epoxy resin anti-seepage coating. Waterstop strips and polysulfide sealant can also be installed as a gap-stopping structure between the upper waterstop steel plate 5 and the anti-seepage plate 2, effectively preventing water from entering between them. The upper waterstop steel plate 5 is welded to the anti-seepage plate 2, and the epoxy resin anti-seepage coating is removed at the weld points.

[0042] In this embodiment, see Figure 1 and Figure 2 As a preferred design, the lower waterstop steel plate 3 and the intermediate flexible waterstop layer 4, as well as the intermediate flexible waterstop layer 4 and the upper waterstop steel plate 5, are heat-fused and bonded together. Neoprene adhesive can be used for bonding, ensuring the tensile strength of the joint is ≥5MPa. Simultaneously, a limiting structure is provided between the lower waterstop steel plate 3 and the intermediate flexible waterstop layer 4 to restrict their relative sliding. This limiting structure includes a limiting groove 31 on the upper surface of the lower waterstop steel plate 3 and a limiting protrusion 41 fixedly disposed on the lower surface of the intermediate flexible waterstop layer 4 and embedded in the limiting groove 31. Similarly, a limiting structure is also provided between the intermediate flexible waterstop layer 4 and the upper waterstop steel plate 5 to restrict their relative sliding; specifically, a groove and a protrusion can be used in combination, similar to the structure between the lower waterstop steel plate 3 and the intermediate flexible waterstop layer 4.

[0043] In this embodiment, see Figure 3As a preferred design, the geomembrane 2 is formed by multiple interlocking panels to create a large area, with an assembly gap between the sides of adjacent geomembranes 2. The composite waterproofing system also includes a gap-filling connection structure set in the assembly gap between two geomembranes 2. The gap-filling connection structure includes a sealant 6, a connecting plate 7, a water-swellable adhesive strip 8, and a waterproofing material 9. The sealant 6 fills the assembly gap and is located near the bottom of the gap. The connecting plate 7 is embedded in the sides of the geomembranes 2 on both sides of the assembly gap and is located below the upper surface of the sealant 6. The connecting plate 7 and the geomembranes 2 have appropriate pressure and friction, thereby stably connecting the two adjacent geomembranes 2. A water-swellable rubber strip 8 is installed in the gap filler and located above the sealant 6. The water-swellable rubber strip 8 is in close contact with the sides of the impermeable boards 2 on both sides of the assembly gap. If the assembly gap deforms and water seeps in, the water-swellable rubber strip 8 will expand to a certain extent upon contact with water, thus ensuring close contact with the sides of the impermeable boards 2 and achieving a sealing and water-stopping effect. Waterproofing material 9 is filled in the assembly gap and located above the water-swellable rubber strip 8, achieving multiple waterproofing effects. Furthermore, the gap filling connection structure also includes a caulking and leveling material 10 filled in the assembly gap and located above the waterproofing material 9. During construction, the upper surface of the caulking and leveling material 10 is basically flush with the upper surface of the impermeable boards 2 on both sides. The caulking and leveling material 10 can be made of rubber and can be bonded to the impermeable boards 2. The gap filling connection structure can effectively seal the assembly gap between the two impermeable boards 2, effectively preventing water from seeping in from the gap.

[0044] As can be seen from the above, the composite water-stopping system of this utility model has the following beneficial effects:

[0045] 1. By setting up a multi-layer composite foundation consisting of a lower water-stop steel plate 3, an intermediate flexible water-stop layer 4, and an upper water-stop steel plate 5, the foundation for the installation and water-stopping of the seepage-proof plate 2 on the foundation 1 is provided, which plays a triple water-stopping role. The multi-layer composite foundation has both rigidity and flexibility, and can adapt to the seepage-proofing and water-stopping needs of various foundations 1 such as rock foundations 1, soft foundations 1, and geological change zones. In particular, it can be used in situations that include multiple types of foundations 1.

[0046] 2. By setting a gap-filling connection structure in the assembly gap between the anti-seepage boards 2, and by utilizing the joint work of the sealant 6, connecting plate 7, water-swellable adhesive strip 8 and waterproof material 9, water can be effectively prevented from seeping into the gap, thus improving the water-stopping performance.

[0047] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0048] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A composite waterstop system for a diaphragm (2) for installation and waterstop of a diaphragm (2) on a foundation (1), characterized in that: The application relates to a multi-layer composite foundation, which comprises a lower water-stopping steel plate (3) arranged on a foundation (1), an intermediate flexible water-stopping layer (4) arranged on the upper surface of the lower water-stopping steel plate (3), and an upper water-stopping steel plate (5) arranged on the upper surface of the intermediate flexible water-stopping layer (4), the intermediate flexible water-stopping layer (4) being fixedly connected with the lower water-stopping steel plate (3) and the upper water-stopping steel plate (5) and being tightly attached to the lower water-stopping steel plate (3) and the upper water-stopping steel plate (5) respectively, the lower water-stopping steel plate (3) being directly or indirectly fixed on the foundation (1), a water-stopping plate (2) being fixedly arranged on the upper surface of the upper water-stopping steel plate (5), and a gap water-stopping structure being arranged on the upper surface of the upper water-stopping steel plate (5) and sealing the gap between the upper surface of the upper water-stopping steel plate (5) and the water-stopping plate (2), the thickness of the lower water-stopping steel plate (3) being greater than or equal to 3mm, the thickness of the lower water-stopping steel plate (3) being greater than or equal to 5mm, and the thickness of the intermediate flexible water-stopping layer (4) being 10-30mm.

2. The composite waterstop system of claim 1, wherein: The lower water-stopping steel plate (3) and the intermediate flexible water-stopping layer (4) and the intermediate flexible water-stopping layer (4) and the upper water-stopping steel plate (5) are hot-melt pressure-bonded and adhered.

3. The composite waterstop system of claim 1, wherein: The lower water-stopping steel plate (3) and the intermediate flexible water-stopping layer (4) are provided with a limiting structure for limiting the relative sliding of the two, and the intermediate flexible water-stopping layer (4) and the upper water-stopping steel plate (5) are also provided with a limiting structure for limiting the relative sliding of the two.

4. The composite waterstop system of claim 3, wherein: The limiting structure between the lower water-stopping steel plate (3) and the intermediate flexible water-stopping layer (4) comprises a limiting groove (31) arranged on the upper surface of the lower water-stopping steel plate (3) and a limiting protrusion (41) fixedly arranged on the lower surface of the intermediate flexible water-stopping layer (4) and embedded in the limiting groove (31).

5. The composite waterstop system of claim 1, wherein: The upper surface of the upper water-stopping steel plate (5) is coated with an epoxy resin water-stopping coating.

6. The composite waterstop system of claim 1, wherein: The material of the intermediate flexible water-stopping layer (4) is EPDM material.

7. The composite waterstop system according to claim 1 or 6, characterized in that: The compression rate of the intermediate flexible water-stopping layer (4) is 20%-30%.

8. The composite waterstop system of claim 1, wherein: The upper water-stopping steel plate (5) and the water-stopping plate (2) are welded and fixed.

9. The composite waterstop system of claim 1, wherein: The water-stopping plates (2) are spliced with each other and have a splicing gap between the side surfaces of the two water-stopping plates (2), and the gap filling connecting structure is arranged in the splicing gap between the two water-stopping plates (2), the gap filling connecting structure comprising a caulking material (6), a connecting plate (7), a water-swelling adhesive tape (8) and a waterproof material (9), the caulking material (6) being filled in the splicing gap, the connecting plate (7) being embedded in the side surfaces of the water-stopping plates (2) on the two sides of the splicing gap and being located below the upper surface of the caulking material (6), the water-swelling adhesive tape (8) being arranged in the gap filling and being located on the upper side of the caulking material (6), the water-swelling adhesive tape (8) being in close contact with the side surfaces of the water-stopping plates (2) on the two sides of the splicing gap, and the waterproof material (9) being filled in the splicing gap and being located on the upper side of the water-swelling adhesive tape (8).

10. The composite waterstop system of claim 9, wherein: The gap filling connecting structure further comprises a jointing and leveling material filled in the splicing gap and located on the upper side of the waterproof material (9).

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