Three-dimensional composite one-way drainage impermeable membrane

Abstract

The invention belongs to the field of impermeable membranes, particularly relates to a three-dimensional composite one-way drainage impermeable membrane, and aims to overcome the defects that an existing impermeable membrane is single in function and cannot meet different use requirements. The three-dimensional water and air guide net is arranged at the bottom of the lower-layer geotechnical cloth; the upper-layer geotechnical cloth is arranged above the lower-layer geotechnical cloth; the geomembrane is arranged between the lower-layer geotextile and the upper-layer geotextile; a water guide duct is formed between the three-dimensional water guide and air guide net and the geomembrane; the one-way drain valve is arranged on the geomembrane and matched with the water guide duct; according to the invention, exhaust and drainage pressure unitization and normalization are taken as a core technical target, functions of seepage prevention, water collection, water guide, exhaust, drainage, reinforcement and the like are integrated, engineering problems such as high groundwater, gas jacking, reservoir flatulence, channel freeze thawing and frost heaving and the like are effectively solved, and meanwhile, the construction cost is reduced. The method has the characteristics of convenient transportation, simple construction, cost saving and the like.

Description

Technical Field

[0001] This invention relates to the field of geomembrane technology, and more particularly to a three-dimensional composite unidirectional drainage geomembrane. Background Technology

[0002] The standard name for geomembrane is polyethylene geomembrane, primarily made of a milky white, translucent to opaque thermoplastic resin material—polyethylene resin. Polyethylene is a high-molecular-weight polymer, a non-toxic, odorless, and tasteless white granule with a melting point of approximately 110℃-130℃ and a relative density of 0.918-0.965. Geomembranes exhibit good heat and cold resistance, good chemical stability, high rigidity and toughness, good mechanical strength, and good resistance to environmental stress cracking and tear strength. As density increases, mechanical properties and barrier properties correspondingly improve, along with higher heat resistance and tensile strength. They are resistant to corrosion from acids, alkalis, and organic solvents. In existing technologies, geomembranes have a single function and cannot meet different application requirements. Therefore, we propose a three-dimensional composite unidirectional drainage geomembrane to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing geomembranes, which have a single function and cannot meet different usage requirements, by proposing a three-dimensional composite unidirectional drainage geomembrane.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: Three-dimensional composite unidirectional drainage geomembrane, including: Lower layer geotextile; A three-dimensional water-conducting and air-conducting net is disposed at the bottom of the lower geotextile layer; A bottom layer geotextile is disposed at the bottom of the three-dimensional water-conducting and air-conducting network; An upper geotextile is disposed above the lower geotextile. A geomembrane is disposed between the lower geotextile and the upper geotextile; a water-conducting culvert is formed between the three-dimensional water-conducting and air-conducting net and the geomembrane; A one-way drainage valve is provided on the geomembrane and is coordinated with the water diversion culvert. The one-way drainage valve includes a lower cover, an upper cover, a guide rail, a flexible protective ring shield silicone pad, and a water inlet channel. The lower cover is disposed on the geomembrane, and the upper cover is disposed on top of the lower cover. A guide rail is disposed on the inner side of the upper cover, and a flexible protective ring shield silicone pad coupled to the guide rail is disposed inside the lower cover. A water inlet channel is opened at the bottom of the lower cover, and a water outlet channel is opened around the perimeter of the upper cover. The bottom geotextile and the three-dimensional water-conducting and air-conducting net contact the seepage water. The bottom geotextile is used to block large particles of impurities. Simultaneously, water and gas smoothly enter the one-way drainage valve through the bottom geotextile and then exit from the one-way drainage valve. The three-dimensional water-conducting and air-conducting net optimizes the water and air flow paths, increasing the contact area with water through its three-dimensional structure. The three-dimensional water-conducting and air-conducting net guides the water flow orderly through the water-conducting culvert and converges towards the one-way drainage valve, then into the inlet channel. When the water level difference between the inside and outside reaches 2cm-1... When pressurized water is formed at 0cm, generating uplift pressure, the flexible protective ring shield silicone pad is subjected to an upward lifting force, causing it to move upward and connecting the inlet and outlet channels. At this time, water enters through the inlet channel and exits through the outlet channel, flowing into the channel. When the groundwater level is balanced or there is no pressure in the base, the flexible protective ring shield silicone pad will no longer be subjected to an upward lifting force, returning to its original position, disconnecting the connection between the inlet and outlet channels, and entering a sealed state. No more water will be discharged downward, the one-way drain valve will close, preventing downward leakage and acting as a backflow preventer.

[0005] Preferably, the three-dimensional water and air guiding net is arranged in an array to optimize the water flow and air flow path, and the three-dimensional structure of the three-dimensional water and air guiding net increases the contact area with water.

[0006] Preferably, during the drainage process, water enters from the inlet channel at the bottom of the one-way drain valve, then rises to the top of the one-way drain valve, and is discharged outward from the periphery of the one-way drain valve. External impurities cannot enter the interior of the one-way drain valve, thereby preventing clogging.

[0007] Preferably, the interior of the flexible protective ring silicone pad is composed of 361 stainless steel plates.

[0008] Preferably, the upper geotextile, the geomembrane, and the lower geotextile constitute a composite geomembrane, and the composite geomembrane, the three-dimensional water-conducting and air-conducting net, and the bottom geotextile constitute a composite three-dimensional water-conducting and air-conducting component.

[0009] The beneficial effects of the three-dimensional composite unidirectional drainage and seepage prevention membrane in this invention are as follows: 1. High functionality: It is a functional composite structure that combines seepage prevention, water collection, drainage, ventilation, and reinforcement.

[0010] 2. Enhanced Structural Stability: The composite geotextile not only provides filtration but also enhances the friction between the unidirectional drainage composite geomembrane and the structure, contributing to overall structural stability. The geomembrane and the three-dimensional water- and air-conducting network are processed into a single structure, ensuring both the integrity and consistency of the geomembrane and the supporting stiffness of the three-dimensional water- and air-conducting network.

[0011] 3. Water conduction performance: The three-dimensional support structure composed of the bottom three-dimensional water and air conduction net can form a water conduction channel with a certain compressive strength.

[0012] 4. Drainage and ventilation functions: The seepage water and air collected through the water diversion culvert are discharged through the one-way drainage valve, thereby reducing the water pressure and air expansion borne by the base impermeable layer, which is especially suitable for special soils and areas with seasonal freeze-thaw heave.

[0013] 5. Unsupported drainage: Laying the base close to the slope allows for drainage along the slope, avoiding localized water pressure.

[0014] 6. Self-cleaning: The one-way drain valve has one-way sealing and self-cleaning functions, effectively solving the problems of drain blockage and backflow.

[0015] 7. Wide range of applications: The longitudinal water flow rate and drainage capacity of the one-way drain valve can be adjusted and customized according to specific project requirements. Commonly used specifications are XHY20, XHY50, XHY100, etc., which are highly adaptable. The spacing of the one-way drain valve can be set in different specifications such as ①0.5*0.5m, ②1*1m, ③3*3m, ④6*6m.

[0016] 8. Suitable thickness: The thickness deviation of the unidirectional hydrophobic composite geomembrane is controlled between 2mm and 4mm, which facilitates roll forming and construction, and is consistent with the conventional geomembrane construction method.

[0017] 9. Ecological and environmental protection: The operation is carried out under natural pressure, which is low-cost and aesthetically pleasing, facilitates ecological construction, and causes little damage to the original ecological environment.

[0018] The three-dimensional composite unidirectional drainage and seepage prevention membrane of this invention takes the full-area and normalized pressure of the air venting and drainage system as its core technical goal. It integrates functions such as seepage prevention, water collection, water guiding, air venting, drainage, and reinforcement, effectively solving engineering problems such as high groundwater, gas backing, reservoir gas expansion, and freeze-thaw heave in channels. At the same time, it has the characteristics of convenient transportation, simple construction, and cost saving. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a three-dimensional composite unidirectional drainage and seepage prevention membrane provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the one-way drainage valve structure of the three-dimensional composite one-way drainage geomembrane provided in an embodiment of the present invention; Figure 3 Diagram of the anti-clogging valve outlet gap of the three-dimensional composite unidirectional drainage and seepage prevention membrane provided in this embodiment of the invention; Figure 4 The diagram illustrates the construction protection measures for the three-dimensional composite unidirectional drainage and seepage prevention membrane provided in this embodiment of the invention.

[0020] In the diagram: 1. Upper geotextile; 2. One-way drainage valve; 3. Geomembrane; 4. Three-dimensional water and air guiding net; 5. Water guiding culvert; 6. Lower geotextile; 10. Lower cover; 11. Upper cover; 12. Guide fence; 13. Flexible protective ring shield silicone pad; 14. Water inlet channel; 15. Water outlet channel; 16. Bottom geotextile. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] Reference Figures 1-4 The three-dimensional composite unidirectional drainage and seepage prevention membrane provided in this embodiment of the invention includes: Lower layer geotextile 6; A three-dimensional water-conducting and air-conducting net 4 is disposed at the bottom of the lower geotextile 6; The bottom layer geotextile 16 is disposed at the bottom of the three-dimensional water-conducting and air-conducting net 4; Upper geotextile 1, which is disposed above the lower geotextile 6; Geomembrane 3 is disposed between the lower geotextile 6 and the upper geotextile 1; the three-dimensional water-conducting and air-conducting net 4 and the geomembrane 3 form a water-conducting culvert 5; One-way drainage valve 2, which is disposed on the geomembrane 3 and cooperates with the water diversion culvert 5; The one-way drainage valve 2 includes a lower cover 10, an upper cover 11, a guide rail 12, a flexible protective ring shield silicone pad 13, and a water inlet channel 14. The lower cover 10 is disposed on the geomembrane 3, and the upper cover 11 is disposed on the top of the lower cover 10. The guide rail 12 is disposed on the inner side of the upper cover 11, and the flexible protective ring shield silicone pad 13 coupled with the guide rail 12 is disposed inside the lower cover 10. The water inlet channel 14 is opened at the bottom of the lower cover 10, and the water outlet channel 15 is opened around the periphery of the upper cover 11. The bottom geotextile 16 and the three-dimensional water-conducting and air-conducting net 4 contact the seepage water. The bottom geotextile 16 is used to block large particles of impurities. At the same time, water and gas smoothly enter the one-way drainage valve 2 through the bottom geotextile 16 and then exit from the one-way drainage valve 2. The three-dimensional water-conducting and air-conducting net 4 is used to optimize the water flow and air flow path. Through the three-dimensional structure of the three-dimensional water-conducting and air-conducting net 4, the contact area with water is increased. The three-dimensional water-conducting and air-conducting net 4 is used to guide the water flow in an orderly manner through the water-conducting culvert 5 to converge into the one-way drainage valve 2, and then converge into the water inlet channel 14. When the water level difference between the inside and outside reaches 2cm, When pressurized water is formed at 0cm, and uplift pressure is generated, the flexible protective ring shield silicone pad 13 is subjected to an upward lifting force. The flexible protective ring shield silicone pad 13 moves upward, connecting the water inlet channel 14 and the water outlet channel 15. At this time, water enters from the water inlet channel 14 and exits from the water outlet channel 15, flowing into the channel. When the groundwater is balanced or there is no pressure in the base, the flexible protective ring shield silicone pad 13 will not be subjected to an upward lifting force, returning to its original position, disconnecting the connection between the water inlet channel 14 and the water outlet channel 15, and is in a sealed state. No more water is discharged downward, and the one-way drain valve 2 closes, preventing downward leakage and playing a backflow prevention role.

[0023] In this embodiment of the invention, the three-dimensional water and air guiding net 4 is arranged in a row to optimize the water flow and air flow path. The three-dimensional structure of the three-dimensional water and air guiding net 4 increases the contact area with water.

[0024] In this embodiment of the invention, during the drainage process, water enters from the bottom inlet channel 14 of the one-way drain valve 2, then rises to the top of the one-way drain valve 2, and is discharged outward from the periphery of the one-way drain valve 2. External impurities cannot enter the interior of the one-way drain valve 2, thereby playing a role in preventing clogging.

[0025] The three-dimensional composite unidirectional drainage and seepage-proof membrane provided in this embodiment of the invention has an internal structure of 361 stainless steel plates assembled from the flexible protective ring shield silicone pad 13. The characteristics of the flexible protective ring shield silicone pad 13 are as follows: Good physical properties: It has a certain degree of tension and flexibility, strong compressibility, softness and elasticity, and is not easily deformed after long-term use; Chemically stable: It is resistant to high and low temperatures, and can usually maintain stable performance in a temperature range of -40℃ to 230℃. It is chemically stable, non-toxic, odorless, insoluble in water and any solvent, and environmentally friendly and safe. It has multiple functions: some silicone pads have natural adhesive properties, so no additional surface adhesive is needed; it also has excellent insulation, pressure resistance, as well as anti-slip, shockproof and waterproof properties.

[0026] 361 stainless steel sheet has good corrosion resistance for the following reasons: The role of chromium: The chromium content in 361 stainless steel is approximately 16%-18%. Chromium can form a dense chromium oxide film on the surface of the steel plate. This film can isolate the steel plate from external corrosive media, preventing oxygen, water, etc. from reacting with the steel substrate, thus playing a protective role. The influence of nickel: The average nickel content is 12%. It can improve the corrosion resistance of stainless steel, especially in some complex corrosive environments. Nickel can enhance the resistance of stainless steel to non-oxidizing acids, alkalis, salts and other media. At the same time, it can also improve the toughness and ductility of stainless steel and make the chromium oxide film more stable. The benefits of molybdenum: Containing 2%-3% molybdenum, molybdenum can significantly improve the corrosion resistance of stainless steel in reducing media. For example, in solutions containing chloride ions, molybdenum can effectively resist pitting and crevice corrosion, enhancing the corrosion resistance of stainless steel plates in harsh environments.

[0027] like Figure 2 As shown, the one-way drain valve 2 appears understated and simple, yet it conceals a sophisticated design. The area indicated by the arrow is its core anti-clogging zone. Its design is inspired by a deep analysis of water flow dynamics and a precise understanding of common clogging problems in drainage systems.

[0028] The working principle of the three-dimensional composite unidirectional drainage geomembrane provided in this embodiment of the invention is as follows: When water flows near the unidirectional drainage valve 2, it is like entering a carefully planned highway. Guided by the three-dimensional water-guiding and air-guiding net 4 at the bottom of the three-dimensional composite unidirectional drainage geomembrane, the water flows orderly to the bottom of the unidirectional drainage valve 2. Because the three-dimensional water-guiding and air-guiding net 4 has a three-dimensional structure and the function of guiding water and air, it is like a precise traffic control system. It can not only guide the direction of water flow, but also balance the water flow speed and pressure, avoiding water flow turbulence that leads to impurity deposition. After entering the valve, the unique channel structure begins to play its role. Its flow channel abandons the design of traditional valves that may cause dead angles in water flow. It adopts a large radius of curvature and streamlined structure to reduce the collision and friction between the water flow and the valve wall, and reduce the probability of impurity adhesion. At the same time, the internal turbulence structure has been precisely calculated and repeatedly tested to make the water flow form reasonable turbulence in the valve, so that silt, impurities, etc. are not easy to settle, but move forward with the water flow. Ultimately, the water flowed smoothly from the top perimeter, the whole process completed in one go, leaving no chance for blockage.

[0029] The three-dimensional composite unidirectional drainage geomembrane provided in this invention has the characteristics of wide application: when laid in large-scale reservoirs, in the face of rising groundwater levels after rainfall, the groundwater is discharged into the reservoir through the unidirectional drainage valve 2. The unidirectional drainage valve 2, with its excellent anti-clogging performance, ensures the long-term stable operation of groundwater discharge into the reservoir, reduces the cost and frequency of manual cleaning and maintenance, and extends the service life of the unidirectional drainage valve 2. Whether for upgrading municipal infrastructure or constructing large-scale water conservancy projects, the unidirectional drainage valve 2, with its reliable performance and innovative design, has become an indispensable key component in the modern drainage field.

[0030] The specific application scope of the three-dimensional composite unidirectional drainage and seepage prevention membrane provided in this invention is as follows: Firstly, it facilitates groundwater depressurization in hydraulic structures such as canals, slopes, and water conveyance culverts, as well as the management of aqueducts and rivers. It enables slope-following drainage, which is beneficial for the discharge of water from the slope base. Secondly, it addresses seepage prevention, diversion, and pressure relief in landfills. The membrane-mounted one-way drain valve 2 features one-way sealing and self-cleaning functions, effectively solving the problems of drain outlet blockage and water backflow. Third, the external water drainage and pressure relief operations of the tunnel are all carried out under natural pressure, which minimizes the damage to the original ecological environment. Fourth, special soil engineering reduces the water holding capacity of special soil foundations; it can drain some groundwater, effectively alleviating the instability of special soils caused by changes in soil moisture, and can be used for pressure relief in areas affected by freeze-thaw damage; Fifth, the construction of new reservoirs, scenic rivers and lakes, ponds, and large-scale water diversion projects. These projects serve both ventilation and drainage functions. Sixth, the anti-seepage lining of pumped storage reservoirs, and the solution for reverse jacking of interstitial water and groundwater.

[0031] The technical specifications of the three-dimensional composite unidirectional drainage and seepage prevention membrane provided in this embodiment of the invention are shown in the table below: Water permeability testing of one-way drain valve: NB / T10511-2021 One-way drain valve for leak prevention: Complies with standard GB / T50600-2020 Geomembrane: Standard GB / T17642-2008 Three-dimensional water and air guiding network: Complies with standard GB / T40441-2021 The three-dimensional composite unidirectional drainage and seepage prevention membrane provided in this invention has been used in relevant projects, such as: Project Name: Heilongjiang SJLT Phase I Project (S North Direct Irrigation Area S North Water Conveyance Project). The test report of the three-dimensional water and air guiding network is shown in the table below: The composite geomembrane test report is shown in the table below: The test report for the one-way drain valve is shown in the table below: The three-dimensional composite unidirectional drainage and seepage-proof membrane provided in this invention is specifically applied in the concrete lining construction scheme for river channel treatment as follows: In river management projects, concrete lining construction is a crucial step in ensuring the stability of the river structure and the normal drainage function. The following section provides an in-depth analysis of the key construction points and ingenious principles of the core component of this solution—the three-dimensional one-way drainage anti-clogging valve (also known as one-way drainage valve 2) (compatible with 40mm drainage pipes).

[0032] Component composition and function The upper geotextile 1, geomembrane 3, and lower geotextile 6 constitute a composite geomembrane. This composite geomembrane, along with the three-dimensional water- and air-conducting net 4 and the bottom geotextile 16, forms a composite three-dimensional water- and air-conducting component. This component acts as the "vanguard" of the drainage system. The composite geomembrane's three-dimensional water- and air-conducting net possesses excellent permeability and filtration properties, effectively blocking large particles such as silt and preventing them from entering the drainage pipes. Simultaneously, it allows water and gas to smoothly enter the one-way drainage valve 2 and then exit from it. Because the three-dimensional water- and air-conducting net 4 has water- and air-conducting functions, it further optimizes the water and air flow paths. Furthermore, the unique three-dimensional structure of the net increases the contact area with water, guiding the water flow to converge orderly towards the one-way drainage valve 2, improving drainage efficiency and preventing localized water accumulation.

[0033] Reference Figure 3 One-way drain valve 2 outlet gap: As indicated by the arrow, this is the key drainage channel. Its design is meticulously considered; the gap size ensures smooth water flow while preventing larger impurities from entering the pipe and affecting drainage. After the water flows through the three-dimensional water-conducting and air-conducting network of the composite geomembrane, it flows out orderly from these gaps, completing the drainage process. Its special shape and layout, combined with the fluid dynamics design within the valve, ensure that the water maintains a reasonable flow velocity during outflow, reducing the possibility of impurities accumulating in the gaps.

[0034] Reference Figure 4 Construction protection measures During concrete lining construction, ensuring the normal function of the one-way drain valve 2 remains unaffected is crucial. If concrete accidentally falls into the pipe during pouring, it will severely obstruct drainage. Therefore, a simple plastic film is used to protect the 40mm drain pipe. This measure acts like a "protective coat" for the valve, simple yet efficient, effectively preventing concrete and other construction debris from entering the one-way drain valve 2 and the pipe, ensuring unobstructed drainage, avoiding the tedious work and increased costs of cleaning foreign objects from the pipe later, and ensuring the long-term stable operation of the entire river management project's drainage system.

[0035] Through the rational design of each component and meticulous protection during the construction process, the three-dimensional composite unidirectional drainage and seepage prevention membrane in this river channel treatment concrete lining construction scheme can form an all-round anti-siltation unidirectional drainage and pressure relief system for hydraulic structures. It can efficiently realize drainage and anti-siltation functions in complex river environments, laying a solid foundation for river channel treatment projects.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A three-dimensional composite unidirectional drainage and seepage-proof membrane, characterized in that, include: Lower layer geotextile (6); A three-dimensional water-conducting and air-conducting net (4) is provided at the bottom of the lower geotextile (6); The bottom layer geotextile (16) is disposed at the bottom of the three-dimensional water-conducting and air-conducting net (4); Upper geotextile (1), which is disposed above the lower geotextile (6); The geomembrane (3) is disposed between the lower geotextile (6) and the upper geotextile (1); the three-dimensional water-conducting and air-conducting net (4) and the geomembrane (3) form a water-conducting culvert (5). One-way drainage valve (2), the one-way drainage valve (2) is installed on the geomembrane (3), and the one-way drainage valve (2) cooperates with the water diversion culvert (5); The one-way drainage valve (2) includes a lower cover (10), an upper cover (11), a guide rail (12), a flexible protective ring shield silicone pad (13), and a water inlet channel (14). The lower cover (10) is set on the geomembrane (3), and the upper cover (11) is set on the top of the lower cover (10). The guide rail (12) is set on the inner side of the upper cover (11), and the flexible protective ring shield silicone pad (13) coupled with the guide rail (12) is set inside the lower cover (10). The water inlet channel (14) is opened at the bottom of the lower cover (10), and the water outlet channel (15) is opened around the periphery of the upper cover (11). The bottom geotextile (16) and the three-dimensional water-conducting and air-conducting net (4) contact the seepage water. The three-dimensional water-conducting and air-conducting net (4) is used to guide the water flow through the water-conducting culvert (5) in an orderly manner and to converge into the one-way drainage valve (2), and then converge into the water inlet channel (14). When the water level difference between the inside and outside reaches 2cm-10cm to form pressurized water and generate uplift pressure, the flexible protective ring shield silicone pad (13) is subjected to an upward lifting force, and the flexible protective ring shield silicone pad (13) moves upward, so that the water inlet channel... The inlet channel (14) and outlet channel (15) are connected. At this time, water enters from the inlet channel (14) and exits from the outlet channel (15) into the channel. When the groundwater is balanced or there is no pressure in the base, the soft protective ring shield silicone pad (13) will not be subjected to upward lifting force and will return to its initial position. The connection between the inlet channel (14) and outlet channel (15) will be disconnected, and the water will be in a sealed state. No more water will be discharged downward. The one-way drain valve (2) will be closed, and there will be no leakage downward, which will play a role in preventing backflow.

2. The three-dimensional composite unidirectional drainage and seepage prevention membrane according to claim 1, characterized in that, The bottom geotextile (16) is used to block large particles of impurities. At the same time, water and gas smoothly enter the one-way drainage valve (2) through the bottom geotextile (16) and are then discharged outward from the one-way drainage valve (2).

3. The three-dimensional composite unidirectional drainage and seepage prevention membrane according to claim 1, characterized in that, The three-dimensional water and air guiding net (4) is arranged in a row to optimize the water flow and air flow path. Through the three-dimensional structure of the three-dimensional water and air guiding net (4), the contact area with water is increased.

4. The three-dimensional composite unidirectional drainage and seepage prevention membrane according to claim 1, characterized in that, During the drainage process, water enters through the inlet channel (14) at the bottom of the one-way drain valve (2), then rises to the top of the one-way drain valve (2) and is discharged from the periphery of the one-way drain valve (2). External impurities cannot enter the interior of the one-way drain valve (2), thus preventing clogging.

5. The three-dimensional composite unidirectional drainage and seepage prevention membrane according to claim 1, characterized in that, The interior of the soft protective ring shield silicone pad (13) is composed of 361 stainless steel plates.

6. The three-dimensional composite unidirectional drainage and seepage prevention membrane according to claim 1, characterized in that, The upper geotextile (1), geomembrane (3) and lower geotextile (6) constitute a composite geomembrane, and the composite geomembrane, the three-dimensional water-conducting and air-conducting net (4) and the bottom geotextile (16) constitute a composite three-dimensional water-conducting and air-conducting component.

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