Composite waterproof structure for high-pressure water environment and construction method thereof

Abstract

The application relates to the technical field of building waterproofing, and discloses a composite waterproof structure for a high-pressure water environment and a construction method thereof, which comprises a concrete base body including a bearing platform and a raft, the bearing platform is located on the upper surface of the raft and the side wall is exposed, a gradient pressure-resistant waterproof layer covers the exposed surfaces of the side wall of the bearing platform and the plane of the raft, and the gradient pressure-resistant waterproof layer comprises, from inside to outside, an interface reinforcing layer, a permeable epoxy resin layer which penetrates into the surface of the concrete base body by 0.5-1 mm in depth, and a dynamic response layer which is a polyurethane-rubber composite elastomer layer and is tightly attached to the outer surface of the interface reinforcing layer. The gradient pressure-resistant waterproof layer composed of the interface reinforcing layer, the dynamic response layer and a rigid protective layer is combined with the bearing platform and the raft in the concrete base body, and the rigid protective layer enhances the wear resistance, so that the composite waterproof structure with high pressure resistance and high wear resistance is realized, and the stability and durability of the waterproof structure in the high-pressure water environment are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of building waterproofing technology, specifically to a composite waterproofing structure for high-pressure water environments and its construction method. Background Technology

[0002] When constructing underground sites in the Yangtze River Delta region, there are many challenges, such as groundwater, underground humidity, and the contact between underground structures and the surrounding environment.

[0003] Currently, underground sites mainly use a combination of raft foundations and waterproof membranes for waterproofing. During construction, the side walls of the foundation slab and the sides of the raft foundation are frequently in contact with the main body of the foundation and the backfill, and are also in contact with the pressurized water in the foundation. This makes the waterproof layer on the foundation slab and raft foundation very easy to be damaged and cause leakage, which in turn affects the seepage prevention performance of the entire foundation slab waterproof layer and may even cause large-scale water seepage in the underground site, posing a high safety hazard. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a composite waterproof structure and its construction method for high-pressure water environments, solving the problem that the waterproof layer is easily damaged and leaks, posing a high safety hazard.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a composite waterproof structure for high-pressure water environments, comprising:

[0006] The concrete substrate includes a foundation and a raft slab, wherein the foundation is located on the upper surface of the raft slab and has exposed sidewalls;

[0007] A gradient-resistant waterproof layer, covering the exposed surfaces of the foundation sidewalls and raft slab plane, includes, from the inside out:

[0008] Interface reinforcement layer, penetrating epoxy resin layer, penetrates 0.5~1mm into the concrete substrate surface;

[0009] The dynamic response layer, a polyurethane-rubber composite elastomer layer, is tightly attached to the outer surface of the interface reinforcement layer;

[0010] A rigid protective layer, made of fiberglass-reinforced polymer waterproof membrane, is bonded to the outside of the dynamic response layer through a synergistically reinforced interface.

[0011] A sealing mechanism, disposed within the connection gap between adjacent concrete substrates, includes:

[0012] Water guiding channel, V-shaped groove structure, is opened at the center line of the connection gap, with the groove opening facing upward;

[0013] An expansion sealant, a water-swellable polyurethane elastomer, is used to fill the interior of the water-conducting channel.

[0014] Synergistically reinforced interface, thermoplastic polyolefin adhesive film, molten embedded dynamic response layer and rigid protective layer contact interface.

[0015] By adopting the above technical solution, the exposed sidewalls of the foundation provide an additional construction surface for the gradient pressure-resistant waterproof layer, enhancing the overall waterproof coverage and ensuring the stability of the foundation structure in a high-pressure water environment.

[0016] Preferably, the V-shaped groove of the water guiding channel has an inclination angle of 50°±5° on both sides, a groove depth of 25±5mm, and a permeable non-woven fabric is laid at the bottom of the groove, which extends 20mm outside the groove opening and is pressed against the surface of the concrete substrate.

[0017] By adopting the above technical solution, the inclination angle of the two side walls of the V-shaped groove and the groove depth are conducive to the smooth flow of water in the groove, while providing a suitable filling space for the expansion seal. The permeable non-woven fabric laid at the bottom of the groove can not only filter impurities in the water and prevent blockage of the water guiding channel, but also enhance the adhesion to the concrete substrate by extending and pressing it onto the surface of the substrate, assisting in water guiding and improving the sealing effect.

[0018] Preferably, the expansion seal body has a trapezoidal cross-section, with the upper bottom width being 5mm smaller than the V-groove opening and the lower bottom width being the same as the straight section of the groove bottom. A pressure relief micro-tube is pre-embedded inside, with one end of the pressure relief micro-tube penetrating through the top of the expansion seal body and the other end extending obliquely to the external drainage ditch.

[0019] By adopting the above technical solution, the trapezoidal cross-section design allows the expansion seal to be easily placed into the V-groove and to better fit against the groove wall during expansion, achieving effective sealing. The internally embedded pressure relief micro-tube can discharge water to the external drainage ditch when the pressure inside the seal is too high, avoiding damage to the seal due to excessive pressure and ensuring long-term stability of the sealing performance.

[0020] Preferably, the outer surface of the rigid protective layer is provided with an array of wear-resistant bumps. The bumps are truncated cones with a bottom diameter of 1.5 mm, a top diameter of 0.8 mm, and a height of 0.8 ± 0.2 mm. They are arranged in a rectangular array with a center-to-center spacing of 12 ± 2 mm.

[0021] By adopting the above technical solution, the anti-wear bump array increases the friction and wear resistance of the outer surface of the rigid protective layer, effectively resisting the friction and scratching of external objects, reducing the damage to the waterproof membrane caused by long-term friction, further improving the protective ability of the rigid protective layer, and extending the service life of the entire waterproof structure.

[0022] Preferably, the melt penetration depth of the synergistically reinforced interface is 40% ± 10% of the thickness of the dynamic response layer, forming a serrated interlocking structure.

[0023] By adopting the above technical solutions, the melt penetration depth and serrated interlocking structure greatly enhance the connection strength between the dynamic response layer and the rigid protective layer, making the bond between the two layers tighter and less prone to separation, thereby improving the stability and reliability of the entire waterproof structure in high-pressure water environments.

[0024] A composite waterproofing construction method for high-pressure water environments, the method comprising the following steps:

[0025] S1. High-pressure water jet is used to impact the surface of the concrete substrate to form a micropore array with a depth of 0.5~1mm, thereby obtaining an activated surface;

[0026] S2. Spray epoxy resin slurry onto the activated surface, and let the slurry penetrate into the micropores and cure to form an interface reinforcement layer.

[0027] S3. Before the interface reinforcement layer is fully cured, apply polyurethane-rubber composite slurry in multiple layers, controlling the thickness of each layer to be ≤0.5mm, and the cumulative thickness to be 0.8~1.5mm.

[0028] S4. Cut a V-shaped groove with an inclination angle of 50°±5° at the concrete connection gap. Lay a permeable non-woven fabric at the bottom of the V-shaped groove and press the concrete 20mm beyond the edge. Press water-swellable elastomer into the groove in layers to form a trapezoidal cross-section seal.

[0029] S5. Cover the surface of the dynamic response layer with a thermoplastic polyolefin adhesive film; heat it with infrared to 170±10℃ to melt the adhesive film; immediately roll-press to lay a rigid protective layer at a pressure of 0.4~0.6MPa;

[0030] S6. After the rigid protective layer cools to below 60℃, use a 90±10℃ embossing roller to press the surface; form an array of truncated conical bumps with a height of 0.8±0.2mm.

[0031] By adopting the above technical solutions, high-pressure water jets activate the surface to enhance the penetration and anchoring force of epoxy resin, the micropore depth matches the interface layer requirements, temperature and humidity control ensures complete curing of epoxy resin, avoiding bubbles or strength loss, V-shaped grooves at specific angles are cut at the concrete connection gaps, and after laying permeable non-woven fabric, water-swellable elastomer is pressed in layers to effectively seal the gaps. A thermoplastic polyolefin adhesive film is covered on the dynamic response layer, and after being heated and melted by infrared heating, a rigid protective layer is rolled and laid to form a strong synergistic reinforcement interface. After the rigid protective layer cools, an anti-wear bump array is pressed out to enhance its wear resistance and meet the waterproofing requirements in high-pressure water environments.

[0032] Preferably, in step S4, the layered compaction includes the following steps:

[0033] First, compact the bottom layer of high-expansion material with an expansion rate ≥250% and a density ≥95%;

[0034] Then press in a low-expansion-rate material on the surface, with an expansion rate ≤150%, covering the bottom layer and protruding 2~3mm from the groove.

[0035] By adopting the above technical solution, the bottom high expansion rate material provides strong initial expansion force, fills the gap and forms a basic seal, and the high density ensures its stability. The surface low expansion rate material ensures the seal while avoiding damage to the surrounding structure due to excessive expansion. The protruding groove part can further enhance the sealing effect and ensure the waterproof performance of the connection gap.

[0036] Preferably, in step S5, during roller pressing, the adhesive film melts and penetrates to a depth of 40% ± 10% of the dynamic response layer thickness, forming a serrated interlocking interface.

[0037] By adopting the above technical solution, controlling the melting penetration depth of the adhesive film and forming a serrated interlocking interface, a high-strength bond can be achieved between the dynamic response layer and the rigid protective layer. The two interlock with each other, like "interlocking gears," which greatly enhances the connection stability between the two layers and improves the reliability of the entire waterproof structure in complex environments.

[0038] Preferably, in step S3, the composite slurry comprises the following raw materials in parts by weight:

[0039] 100 parts of polyurethane prepolymer were synthesized by reacting diphenylmethane diisocyanate with polyether polyol, with an isocyanate group content of 7.5 ± 1.0 wt%.

[0040] 30 parts of styrene-butadiene rubber latex, solid content 45±5%, pH value 9.0±0.5, glass transition temperature -40℃;

[0041] 6.5±1.5 parts of nano-silica, hydrophilic fumed silica, particle size 15±5nm, specific surface area 200±50m² / g;

[0042] In this process, polyurethane prepolymer and styrene-butadiene rubber latex are mechanically stirred at 500~800 r / min for 12 min, nano-silica is added, and the mixture is then dispersed at 1200~1500 r / min for 25 min to obtain a composite slurry.

[0043] By adopting the above technical solutions, the polyurethane prepolymer provides basic curing performance and strength, the styrene-butadiene rubber latex imparts elasticity and flexibility to the slurry, the nano-silica enhances the strength and stability of the slurry, and the reasonable stirring and dispersion process ensures that the components are mixed evenly, so that the final composite slurry can form a dynamic response layer with excellent performance.

[0044] Preferably, in step S2, during the curing process of the epoxy resin slurry, the ambient temperature is controlled at 20℃-30℃ and the relative humidity is controlled at 40%-60% to ensure that the curing effect and penetration depth of the interface reinforcement layer meet the requirements.

[0045] By adopting the above technical solution, the slurry can fully penetrate into the micropores and cure evenly, ensuring the curing effect of the interface reinforcement layer, making it tightly bonded to the concrete matrix, and achieving the ideal penetration depth, thereby providing a reliable basic bonding force for the entire waterproof structure.

[0046] This invention provides a composite waterproof structure and its construction method for use in high-pressure water environments. It has the following beneficial effects:

[0047] 1. In this invention, a gradient compressive-resistant waterproof layer composed of an interface reinforcement layer, a dynamic response layer, and a rigid protective layer is set up and combined with the foundation and raft in the concrete matrix to achieve complementary advantages of each layer of materials. The interface reinforcement layer penetrates into the concrete matrix to enhance adhesion, the dynamic response layer provides elastic adaptation to deformation, and the rigid protective layer enhances wear resistance, thereby realizing a high-pressure and high-wear-resistant composite waterproof structure, effectively improving the stability and durability of the waterproof structure in a high-pressure water environment.

[0048] 2. In this invention, by setting a sealing mechanism in the gap between adjacent concrete substrates, including a water-guiding channel with a specific structure, an expansion seal body, and a synergistic reinforcing interface, the gap between the substrates is effectively sealed and drained. The water-guiding channel guides the water flow, the expansion seal body expands and fills the gap when it comes into contact with water, and the synergistic reinforcing interface enhances the interlayer bonding, thereby achieving high sealing performance, preventing water from seeping through the gap between the substrates, and ensuring the overall waterproof effect of the composite waterproof structure.

[0049] 3. In this invention, by using polyurethane-rubber composite slurry and glass fiber reinforced polymer waterproof membrane in combination, the material performance is synergistically improved. The polyurethane-rubber composite slurry has good elasticity and sealing properties, while the waterproof membrane provides high strength and water resistance. The combination of the two enhances the pressure-bearing and wear-resistant properties of the waterproof material, thereby achieving long-term stable waterproof function of the composite waterproof structure in high-pressure water environments and extending its service life. Attached Figure Description

[0050] Figure 1 This is a structural diagram of a composite waterproof structure for use in high-pressure water environments according to the present invention.

[0051] Figure 2 This is a schematic diagram of the process flow for a composite waterproofing construction method for high-pressure water environments according to the present invention. Detailed Implementation

[0052] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Please see the appendix Figure 1 This invention provides a composite waterproof structure for high-pressure water environments, comprising:

[0054] The concrete substrate includes the foundation and the raft slab, with the foundation located on the upper surface of the raft slab and its sidewalls exposed.

[0055] A gradient-resistant waterproof layer, covering the exposed surfaces of the foundation sidewalls and raft slab plane, includes, from the inside out:

[0056] Interface reinforcement layer, penetrating epoxy resin layer, penetrates 0.5~1mm into the concrete substrate surface;

[0057] The dynamic response layer, a polyurethane-rubber composite elastomer layer, is tightly attached to the outer surface of the interface reinforcement layer;

[0058] A rigid protective layer, made of fiberglass-reinforced polymer waterproof membrane, is bonded to the outside of the dynamic response layer through a synergistically reinforced interface.

[0059] A sealing mechanism, disposed within the connection gap between adjacent concrete substrates, includes:

[0060] Water guiding channel, V-shaped groove structure, is opened at the center line of the connection gap, with the groove opening facing upward;

[0061] An expansion sealant, a water-swellable polyurethane elastomer, is used to fill the interior of the water-conducting channel.

[0062] Synergistically reinforced interface, thermoplastic polyolefin adhesive film, molten embedded dynamic response layer and rigid protective layer contact interface.

[0063] The concrete substrate serves as the foundation support for the entire waterproof structure. The foundation cap primarily bears the load transmitted from the superstructure and transfers it to the raft slab. The raft slab has a large area, which can more evenly distribute the pressure transmitted by the foundation cap to the foundation. The foundation cap is located on the upper surface of the raft slab and its sidewalls are exposed. This structural form provides a specific construction surface for subsequent waterproofing treatment.

[0064] In the gradient pressure-resistant waterproof layer, the epoxy resin requires a low-viscosity, high-permeability formulation. It penetrates and seals the capillary pores of the concrete surface, forming a strong anchoring force, significantly improving the physical bond strength between subsequent coatings and the concrete substrate. This prevents "backside" peeling caused by water pressure. Furthermore, this composite layer combines the high elasticity and fatigue resistance of polyurethane with the flexibility and water resistance of rubber. Its main function is to absorb minor deformations (expansion, contraction, cracking) of the concrete substrate caused by temperature changes, loads, or slight settlement. Its excellent elongation and elastic recovery effectively adapt to dynamic displacement without cracking. The fiberglass reinforcement layer provides high tensile strength, puncture resistance, and impact resistance, protecting the inner flexible layer from mechanical damage during backfilling, construction, or operation. The polymer roll material itself possesses excellent water resistance, chemical corrosion resistance, and long-term stability, serving as the ultimate barrier against high water pressure and harsh environments.

[0065] The V-shaped channel of the water guide has a side wall inclination of 50°±5° and a depth of 25±5mm. The bottom of the channel is covered with permeable non-woven fabric, which extends 20mm outside the channel opening and is pressed against the concrete substrate surface.

[0066] The V-groove design helps to concentrate leaking water and guide it to the bottom of the groove. The inclination balances the water guiding efficiency and structural stability, preventing the groove wall from collapsing. The permeable non-woven fabric acts as a filter layer to prevent the subsequent filling of sealing particles from clogging the water guiding path. Its 20mm extension ensures continuous overlap with the concrete, guiding the flow of water that may seep into the gaps, facilitating centralized treatment, and preventing water from seeping into the edges.

[0067] The expansion seal has a trapezoidal cross-section. The width of the upper bottom is 5mm smaller than the opening of the V-groove, and the width of the lower bottom is the same as the straight section of the bottom of the groove. A pressure relief micro-tube is pre-embedded inside. One end of the pressure relief micro-tube passes through the top of the expansion seal and the other end extends obliquely to the external drainage ditch.

[0068] The trapezoidal cross-section design ensures that the seal is tightly embedded in the V-groove. The reserved gap at the top is for expansion space. The pressure relief microtube is made of PE or PP material with an inner diameter of 2-4mm. When the seal expands due to water and generates excessive internal pressure, the microtube can act as a pressure relief channel to prevent the seal from losing its elasticity or damaging its structure due to excessive expansion. At the same time, in the case of initial seepage or low water pressure, the microtube can guide a small amount of seepage water to the external ditch, achieving a combination of "blocking and drainage". The oblique extension is conducive to drainage and is not easy to clog.

[0069] The outer surface of the rigid protective layer is provided with an array of wear-resistant bumps. The bumps are truncated cones with a bottom diameter of 1.5 mm, a top diameter of 0.8 mm, and a height of 0.8 ± 0.2 mm. They are arranged in a rectangular array with a center-to-center spacing of 12 ± 2 mm.

[0070] The main function of the convex dot array is to increase the surface friction coefficient and prevent the subsequent backfill soil from slipping along the smooth waterproof layer surface under saturation. The truncated cone shape takes into account both wear resistance and stress concentration, optimizes the balance between anti-slip effect and material usage, and ensures the feasibility of the embossing process.

[0071] The melt penetration depth of the synergistically reinforced interface is 40% ± 10% of the thickness of the dynamic response layer, forming a serrated interlocking structure.

[0072] This interface uses hot melt bonding technology, rather than physical overlapping or ordinary adhesive. The adhesive film is made of modified TPO or EVA material, which melts at a temperature of 170±10℃, with 40%±10% of it penetrating into the surface microstructure of the underlying dynamic response layer. After cooling and solidification, it forms a "serrated" mechanical interlocking, which has higher shear strength, peel strength and long-term stability than simple surface bonding, and is especially resistant to interlayer separation under water pressure.

[0073] Please see the appendix Figure 2 A composite waterproofing construction method for high-pressure water environments, comprising the following steps:

[0074] S1. High-pressure water jet is used to impact the surface of the concrete substrate to form a micropore array with a depth of 0.5~1mm, thereby obtaining an activated surface;

[0075] High-pressure water jets, with pressures ranging from 1500 to 2500 bar, can effectively remove laitance, weak layers, and contaminants from concrete surfaces. At the same time, they open capillary pores to form a rough "activated surface." The resulting micropore array, with a depth of 0.5 to 1 mm, is crucial for the effective penetration and anchoring of subsequent epoxy resin. These micropores increase the roughness of the concrete surface, creating an activated surface that is beneficial for the adhesion of subsequent materials.

[0076] S2. Spray the epoxy resin slurry onto the activated surface. The slurry penetrates into the micropores and cures to form an interface reinforcement layer.

[0077] During the curing process of epoxy resin slurry, the ambient temperature is controlled at 20℃-30℃ and the relative humidity is controlled at 40%~60% to ensure that the curing effect and penetration depth of the interface reinforcement layer meet the requirements.

[0078] Use a spraying device to evenly spray the epoxy resin slurry onto the activated surface. Spraying ensures uniform coverage and facilitates penetration. Strictly control the temperature and humidity: 20-30℃, 40%~60%RH, to ensure a strong bond with the concrete substrate.

[0079] S3. Before the interface reinforcement layer is fully cured, apply polyurethane-rubber composite slurry in multiple layers, controlling the thickness of each layer to be ≤0.5mm, and the cumulative thickness to be 0.8~1.5mm.

[0080] The composite slurry comprises the following raw materials in parts by weight:

[0081] 100 parts of polyurethane prepolymer were synthesized by reacting diphenylmethane diisocyanate with polyether polyol, with an isocyanate group content of 7.5 ± 1.0 wt%.

[0082] 30 parts of styrene-butadiene rubber latex, solid content 45±5%, pH value 9.0±0.5, glass transition temperature -40℃;

[0083] 6.5±1.5 parts of nano-silica, hydrophilic fumed silica, particle size 15±5nm, specific surface area 200±50m² / g;

[0084] In this process, polyurethane prepolymer and styrene-butadiene rubber latex are mechanically stirred at 500-800 r / min for 12 min, nano-silica is added, and the mixture is then dispersed at 1200-1500 r / min for 25 min to obtain a composite slurry.

[0085] When the interface reinforcement layer is in a viscous state before it is fully cured, the scraping process ensures that chemical bonds or molecular chain entanglements are formed between the two layers to achieve optimal interlayer adhesion. The layers are applied in thin coats of ≤0.5mm each to prevent bubbles, pinholes, or shrinkage cracking caused by difficulty in evaporation of internal solvents / water due to a single thick coat. The cumulative thickness is 0.8~1.5mm, determined according to the water pressure level and deformation requirements. The polyurethane prepolymer provides reactive sites, the styrene-butadiene rubber emulsion improves flexibility and water resistance, and the nano-silica acts as a reinforcing filler and thixotropic agent to improve the slurry's anti-sagging and mechanical properties. High-speed dispersion ensures that the nanoparticles are fully aggregated and uniformly dispersed.

[0086] S4. Cut a V-shaped groove with an inclination angle of 50°±5° at the concrete connection gap. Lay a permeable non-woven fabric at the bottom of the V-shaped groove and press the concrete 20mm beyond the edge. Press water-swellable elastomer into the groove in layers to form a trapezoidal cross-section seal.

[0087] Layered compaction includes the following steps:

[0088] First, compact the bottom layer of high-expansion material with an expansion rate ≥250% and a density ≥95%;

[0089] Then press in a low-expansion-rate material on the surface, with an expansion rate ≤150%, covering the bottom layer and protruding 2~3mm from the groove.

[0090] The V-groove cutting must ensure dimensional accuracy and groove wall integrity. The bottom layer of the layered compaction uses a material with a high expansion rate of ≥250%, which generates strong expansion force when exposed to water to quickly seal possible leakage channels. The top layer uses a material with a low expansion rate of ≤150%, providing a more flexible and durable sealing surface and reducing the risk of deterioration or extrusion of the high expansion material during repeated wet and dry cycles. The top layer protrudes 2~3mm from the groove opening to ensure close contact with the subsequent cover layer. The compaction must be dense, with the bottom layer having a density of ≥95% to prevent cavities. The layered operation ensures dense filling, ultimately forming a trapezoidal cross-section seal.

[0091] S5. Cover the surface of the dynamic response layer with a thermoplastic polyolefin adhesive film; heat it with infrared to 170±10℃ to melt the adhesive film; immediately roll-press to lay a rigid protective layer at a pressure of 0.4~0.6MPa;

[0092] During roll pressing, the adhesive membrane melts and penetrates to a depth of 40% ± 10% of the dynamic response layer thickness, forming a serrated interlocking interface.

[0093] Infrared heating provides uniform and controllable heat, allowing the adhesive film to melt rapidly to the appropriate viscosity. Roller pressure and “instant” operation ensure that the molten adhesive film bonds with the rigid protective layer in the best condition and partially penetrates the surface structure of the underlying dynamic response layer under pressure.

[0094] S6. After the rigid protective layer cools to below 60℃, use a 90±10℃ embossing roller to press the surface; form an array of truncated conical bumps with a height of 0.8±0.2mm.

[0095] Cooling to below 60°C ensures that the rigid protective layer and the underlying structure are basically set, avoiding irreversible deformation or interlayer displacement caused by embossing at high temperatures. Heated embossing rollers are used to soften the surface layer of the polymer roll material, making it easier to plastically deform under pressure to form the designed embossed shape and precise size. The conical embossed array enhances the surface wear resistance while maintaining the overall strength of the substrate.

[0096] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite waterproof structure for high-pressure water environment, characterized by, The utility model relates to a kind of composite waterproof structures for high-pressure water environment, and the utility model provides a kind of composite waterproof structures for high-pressure water environment, which comprises: Concrete base body including platform and raft, the platform is located raft upper surface and side wall exposure; Gradient compression waterproof layer, covering the exposed surface of platform side wall and raft plane, including from inside to outside in turn: Interface reinforcing layer, penetrating epoxy resin layer, depth penetrates into concrete base body surface 0.5~1mm; Dynamic response layer, polyurethane-rubber composite elastomer layer, closely attached to the outer surface of interface reinforcing layer; Rigid protective layer, glass fiber reinforced polymer waterproofing membrane, is bonded to the outside of dynamic response layer by synergistic reinforcement interface; Sealing mechanism, set in the connecting gap between adjacent concrete base body, including: Water guide channel, V-shaped groove structure, is set in the center line of connecting gap, notch upwards; Expansion sealing body, polyurethane water-swelling elastomer, filled in water guide channel inside; Synergistic reinforcement interface, thermoplastic polyolefin adhesive film, melt-embedded in the contact interface of dynamic response layer and rigid protective layer.

2. The composite waterproof structure for high-pressure water environment according to claim 1, characterized in that: The inclination of the two side walls of the V-shaped groove of the water guide channel is 50°±5°, the groove depth is 25±5mm, the groove bottom is paved with water-permeable non-woven fabric, and the water-permeable non-woven fabric extends to 20mm outside the notch and is pressed against the surface of the concrete base body.

3. The composite waterproof structure for high-pressure water environment according to claim 1, characterized in that: The expansion sealing body is trapezoidal in cross section, the upper base width is 5mm smaller than the notch opening of the V-shaped groove, the lower base width is equal to the flat section of the groove bottom, and a pressure relief microtube is embedded inside, one end of the pressure relief microtube penetrates through the top of the expansion sealing body, and the other end extends obliquely to the external drainage ditch.

4. The composite waterproof structure for high-pressure water environment according to claim 1, characterized in that: The outer surface of the rigid protective layer is provided with an array of wear-resistant convex points, the convex points are truncated cones, the base diameter is 1.5mm, the top diameter is 0.8mm, the height is 0.8±0.2mm, the convex points are arranged in a rectangular array with a center distance of 12±2mm.

5. The composite waterproof structure for high-pressure water environment according to claim 1, characterized in that: The melting penetration depth of the synergistic reinforcement interface is 40%±10% of the thickness of the dynamic response layer, forming a zigzag occlusion structure.

6. A composite waterproofing construction method for high-pressure water environment, characterized in that, The utility model provides a kind of composite waterproof structures for high-pressure water environment, and the utility model provides a kind of composite waterproof structures for high-pressure water environment, which comprises: S1, a micro-pore array with a depth of 0.5~1mm is formed on the surface of the concrete base body by using high-pressure water jet, to obtain an activated surface; S2, epoxy resin paste is sprayed onto the activated surface, and the paste penetrates into the micro-pores to form an interface reinforcing layer; S3, when the interface reinforcing layer is not completely cured, polyurethane-rubber composite paste is applied in multiple times, with a single thickness controlled to be less than or equal to 0.5mm and a cumulative thickness of 0.8~1.5mm; S4, a V-shaped groove with an inclination of 50°±5° is cut at the concrete connecting gap, water-permeable non-woven fabric is paved on the groove bottom, and the edge extends 20mm outside to press against the concrete;Water-swelling elastomer is layered and filled into the groove to form a trapezoidal sealing body; S5, thermoplastic polyolefin adhesive film is covered on the surface of the dynamic response layer;The adhesive film is melted by infrared heating to 170±10℃;Rigid protective layer is immediately rolled and laid, with a pressure of 0.4~0.6MPa; S6, after the rigid protective layer cools down to below 60℃, the surface is pressed by a 90±10℃ embossing roller;An array of truncated cone convex points with a height of 0.8±0.2mm is formed.

7. The composite waterproof construction method for high-pressure water environment according to claim 6, characterized in that: In step S4, the layered and filled process includes the following steps: First, high-expansion-rate material with an expansion rate of greater than or equal to 250% and a density of greater than or equal to 95% is filled in the bottom layer. Re-pressing the low-expansion material with a surface layer, expansion rate ≤ 150%, covering the bottom layer and protruding 2-3 mm from the notch.

8. The composite waterproof construction method for high-pressure water environment according to claim 6, characterized in that: In the step S5, the penetration depth of the adhesive film reaches 40%±10% of the thickness of the dynamic response layer during the rolling and laying, forming a serrated occlusal interface.

9. The composite waterproof construction method for high-pressure water environment according to claim 6, characterized in that: In the step S3, the composite slurry comprises the following raw materials by weight: 100 parts of polyurethane prepolymer, synthesized by reacting diphenylmethane diisocyanate with polyether polyol, isocyanate group content 7.5±1.0wt%; 30 parts of butadiene styrene rubber emulsion, solid content 45±5%, pH value 9.0±0.5, glass transition temperature -40℃; 6.5±1.5 parts of nano-silicon dioxide, hydrophilic fumed silica, particle size 15±5 nm, specific surface area 200±50 m² / g; The polyurethane prepolymer and butadiene styrene rubber emulsion are mechanically stirred at 500-800 r / min for 12 min, nano-silicon dioxide is added, and the speed is switched to 1200-1500 r / min for high-speed dispersion for 25 min to obtain the composite slurry.

10. The composite waterproof construction method for high-pressure water environment according to claim 6, characterized in that: In the step S2, during the curing process of the epoxy resin slurry, the environmental temperature is controlled at 20℃-30℃ and the relative humidity is controlled at 40%-60% to ensure that the curing effect and penetration depth of the interface reinforcement layer meet the requirements.

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