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 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 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 and guide, exhaust and 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] The invention relates to the technical field of anti-seepage membranes, in particular to a three-dimensional composite unidirectional drainage anti-seepage membrane. Background Art

[0002] The standard name for anti-seepage membranes is polyethylene geomembrane, which is primarily made of polyethylene resin, a milky white, translucent to opaque thermoplastic resin. Polyethylene is a high-molecular polymer that is non-toxic, tasteless, and odorless white granules with a melting point of approximately 110°C-130°C and a relative density of 0.918-0.965. The anti-seepage membrane has excellent heat and cold resistance. It has good chemical stability, high rigidity and toughness, good mechanical strength, and good resistance to environmental stress cracking and tearing. As density increases, mechanical and barrier properties improve accordingly, and heat resistance and tensile strength are also higher. It is resistant to corrosion from acids, alkalis, and organic solvents.

[0003] In the existing technology, the anti-seepage membrane has a single function and cannot meet different usage requirements. Therefore, we propose a three-dimensional composite one-way drainage anti-seepage membrane to solve the above problem. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the existing anti-seepage membrane in the art, that is, the anti-seepage membrane has a single function and cannot meet different usage requirements, and to propose a three-dimensional composite one-way drainage anti-seepage membrane.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] Three-dimensional composite one-way drainage and anti-seepage membrane, including:

[0007] Lower geotextile;

[0008] A three-dimensional net is set at the bottom of the lower geotextile;

[0009] The upper geotextile is placed above the lower geotextile;

[0010] The geomembrane is arranged between the lower geotextile and the upper geotextile; a water duct is formed between the three-dimensional net and the geomembrane;

[0011] One-way drain valve, installed on the geomembrane and coordinated with the water culvert;

[0012] The one-way drainage valve includes a lower cover arranged on the geomembrane, and an upper cover is arranged on the top of the lower cover, a guide fence is arranged on the inner side of the upper cover, and a flexible ring shield silicone pad coupled with the guide fence is arranged 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 periphery of the upper cover;

[0013] The lower geotextile and the three-dimensional mesh contact the seepage water. The lower geotextile blocks large particles of impurities while allowing water and gas to enter the one-way drain valve smoothly and then be discharged from the one-way drain valve. The three-dimensional mesh optimizes the water flow and airflow paths. Through its three-dimensional structure, it increases the contact area with water, guiding the water flow in an orderly manner through the water diversion culvert to the one-way drain valve and then into the water inlet channel. When the water level difference between the inside and outside reaches 5-10cm, forming pressure water and uplift pressure, the flexible ring shield silicone pad is subjected to an upward supporting force, and the flexible ring shield silicone pad moves upward, connecting the water inlet and outlet channels. At this time, water enters from the water inlet channel and is discharged from the water outlet channel into the channel. When the groundwater is balanced or there is no pressure in the base, the flexible ring shield silicone pad is no longer subjected to the upward supporting force and returns to its original position, disconnecting the water inlet and outlet channels. The connection is sealed, and no water is discharged downward. The one-way drain valve closes, and there is no downward leakage, which acts as a check valve.

[0014] Preferably, the three-dimensional network is arranged in an array.

[0015] Preferably, during the drainage process, water enters from the bottom water inlet channel of the one-way drain valve, rises to the top of the one-way drain valve, and is discharged from the periphery of the one-way drain valve. External impurities cannot enter the one-way drain valve, thereby preventing clogging.

[0016] Preferably, the interior of the flexible ring shield silicone pad is composed of 361 stainless steel plates.

[0017] In the present invention, the beneficial effects of the three-dimensional composite one-way drainage and anti-seepage membrane are:

[0018] 1. Strong functionality: a functional composite structure that integrates anti-seepage, water collection, drainage and reinforcement.

[0019] 2. Enhanced structural stability: The composite geotextile not only provides filtration but also enhances the friction between the one-way drainage composite geomembrane and the structure, contributing to the overall stability of the structure. The anti-seepage geomembrane and the three-dimensional mesh are processed into an integrated structure through advanced technology, ensuring the integrity and consistency of the underlying anti-seepage geomembrane and the support stiffness of the supporting structure.

[0020] 3. Water conduction performance: The three-dimensional support structure composed of the three-dimensional net at the bottom can form a water duct with a certain compressive strength.

[0021] 4. Drainage and exhaust function: The seepage water and gas gathered through the water culvert are discharged through the one-way drain valve, thereby reducing the water pressure and flatulence on the base anti-seepage layer. It is especially suitable for special soil and seasonal freeze-thaw and frost-heave areas.

[0022] 5. Base mid-air drainage: paving in close proximity to the slope can achieve slope-adjacent drainage and avoid local water uplift pressure.

[0023] 6. Self-cleaning: The one-way drain valve on the membrane has one-way sealing and self-cleaning functions, which effectively solves the problems of drain port blockage and backflow.

[0024] 7. Wide range of applications: The vertical water flow rate and the drainage capacity of the one-way drain valve can be adjusted and customized according to specific project requirements. Common specifications include XHY20, XHY50, and XHY100, which are highly adaptable. The spacing between the one-way drain valves can be set to different specifications such as ①0.5*0.5m, ②1*1m, ③3*3m, and ④6*6m.

[0025] 8. Appropriate thickness: The thickness of the one-way water-conducting composite geomembrane is controlled between 2-4 cm, which is convenient for rolling and easy construction, and is consistent with the construction method of conventional geomembranes.

[0026] 9. Ecological and environmental protection: The operation process is under the action of natural pressure, which is low in cost and beautiful, convenient for ecological construction, and has little damage to the original ecological environment.

[0027] The present invention takes the globalization and normalization of the exhaust and drainage system pressure as its core technical goal, and integrates functions such as anti-seepage, water collection and water diversion, exhaust and drainage, and reinforcement. It effectively solves engineering chronic problems such as high groundwater, gas support, reservoir flatulence, and channel freeze-thaw and frost heave. At the same time, it has the characteristics of convenient transportation, simple construction, and cost savings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of the three-dimensional composite one-way drainage and anti-seepage membrane proposed in the present invention;

[0029] Figure 2 This is a schematic diagram of the one-way drainage valve structure of the three-dimensional composite one-way drainage and anti-seepage membrane proposed in the present invention;

[0030] Figure 3 This is a structural diagram of the three-dimensional water and air conducting net of the composite geomembrane of the three-dimensional composite one-way drainage and anti-seepage membrane proposed by the present invention;

[0031] Figure 4 This is a diagram of the water outlet gap of the anti-clogging valve of the three-dimensional composite one-way drainage and anti-seepage membrane proposed by the present invention;

[0032] Figure 5 This is a diagram of the construction protection measures for the three-dimensional composite one-way drainage and anti-seepage membrane proposed in the present invention.

[0033] In the figure: 1. Upper geotextile; 2. One-way drainage valve; 3. Geomembrane; 4. Three-dimensional net; 5. Water diversion culvert; 6. Lower geotextile; 10. Lower cover; 11. Upper cover; 12. Guide fence; 13. Soft protective ring shield silicone pad; 14. Water inlet channel; 15. Water outlet channel. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Reference Figure 1-Figure 5 , three-dimensional composite one-way drainage and anti-seepage membrane, including:

[0036] Lower geotextile 6;

[0037] The three-dimensional net 4 is arranged at the bottom of the lower geotextile 6;

[0038] The upper geotextile 1 is arranged above the lower geotextile 6;

[0039] The geomembrane 3 is arranged between the lower geotextile 6 and the upper geotextile 1; the three-dimensional net 4 and the geomembrane 3 form a water duct 5;

[0040] The one-way drain valve 2 is installed on the geomembrane 3 and cooperates with the water culvert 5;

[0041] The one-way drain valve 2 includes a lower cover 10 disposed on the geomembrane 3, with an upper cover 11 disposed on top of the lower cover 10. A guide fence 12 is disposed inside the upper cover 11, and a flexible ring shield silicone pad 13 coupled to the guide fence 12 is disposed inside the lower cover 10. A water inlet channel 14 is provided at the bottom of the lower cover 10, and a water outlet channel 15 is provided around the periphery of the upper cover 11.

[0042] The lower geotextile 6 and the three-dimensional net 4 contact the seepage water. The lower geotextile 6 blocks large particles of impurities and allows water and gas to enter the one-way drain valve 2 smoothly and then be discharged from the one-way drain valve 2. The three-dimensional net 4 optimizes the water flow and air flow path. Through the three-dimensional structure, it increases the contact area with water and guides the water flow to pass through the water culvert 5 in an orderly manner to the one-way drain valve 2 and then to the water inlet channel 14. When the water level difference between the inside and outside reaches 5-10cm, pressure water is formed, and uplift pressure is generated. The soft protective ring shield silicone pad 13 is subjected to The upward supporting force causes the soft protective ring shield silicone pad 13 to move upward, so that the water inlet channel 14 and the water outlet channel 15 are connected. At this time, water enters from the water inlet channel 14 and is discharged from the water 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 the upward supporting force and will return to its original position, disconnecting the connection between the water inlet channel 14 and the water outlet channel 15. It is in a sealed state, and no water is discharged downward. The one-way drain valve 2 is closed, and there is no leakage downward, which plays a check function.

[0043] In this embodiment, the three-dimensional nets 4 are arranged in an array.

[0044] In this embodiment, during the drainage process, water enters from the bottom water inlet channel 14 of the one-way drain valve 2, 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 one-way drain valve 2, thereby preventing clogging.

[0045] Preferably, the interior of the soft protective ring shield silicone pad 13 is composed of a combination of 361 stainless steel plates. Characteristics of the soft protective ring shield silicone pad 13: Good physical properties: It has a certain tension and flexibility, strong compressibility, is soft and elastic, and is not easy to deform after long-term use. Stable chemical properties: It is resistant to high and low temperatures, and can usually maintain stable performance within the temperature range of -40℃-230℃. It has stable chemical properties, is non-toxic and odorless, is insoluble in water and any solvents, and is environmentally friendly and safe. It has multiple functions: Some silicone pads have natural stickiness and do not require additional surface adhesives; they also have excellent insulation, pressure resistance, as well as anti-slip, shockproof, and water-proof properties;

[0046] 361 stainless steel plate has good corrosion resistance for the following reasons:

[0047] The role of chromium: The chromium content in 361 stainless steel is about 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 plate matrix, thereby playing a protective role.

[0048] Influence of nickel: The average nickel content is 12%, which 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.

[0049] Molybdenum element: Contains 2%-3% molybdenum, which 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.

[0050] like Figure 2 As shown, while the one-way drain valve 2 appears understated and simple, it possesses a complex design. The area indicated by the arrow is the core of its anti-clogging function. Its design was inspired by an in-depth analysis of hydraulic dynamics and a precise understanding of common blockage issues in drainage systems.

[0051] Working Principle: When water approaches the one-way drain valve 2, it's like stepping onto a meticulously planned highway. Guided by a three-dimensional water and air guide mesh at the bottom of the composite geomembrane, the water flows in an orderly manner toward the bottom of the valve. This mesh acts like a precise traffic control system, not only directing the water flow but also balancing its velocity and pressure, preventing turbulence and the accumulation of impurities. Once inside the valve, its unique channel structure comes into play. This flow path eliminates the dead zones that can occur in traditional valves. Instead, it employs a large curvature radius and streamlined construction to minimize collision and friction between the water and the valve wall, reducing the likelihood of impurities adhering to the valve. Furthermore, the internal flow disturbance structure, meticulously calculated and repeatedly tested, creates optimal turbulence within the valve, preventing sediment and impurities from settling and instead allowing them to flow with the current. Ultimately, the water is discharged smoothly from the top edge, a seamless process that leaves no room for clogging.

[0052] Wide application, showing excellent value

[0053] When installed over large reservoirs, groundwater rises after rain, and groundwater is discharged into the reservoir through the one-way drain valve 2. Thanks to its excellent anti-clogging performance, the one-way drain valve 2 ensures long-term stable drainage of groundwater into the reservoir, reduces the cost and frequency of manual cleaning and maintenance, and extends the service life of the one-way drain valve 2. Whether upgrading municipal infrastructure or constructing large-scale water conservancy projects, the one-way drain valve 2 has become an indispensable key component in the modern drainage industry with its reliable performance and innovative design.

[0054] Application scope of three-dimensional composite one-way drainage anti-seepage membrane

[0055] First, it can be used to relieve groundwater pressure in hydraulic structures such as channels, slopes, and water culverts, and to regulate water diversion channels and rivers. It can achieve slope drainage, which is beneficial to the discharge of water from the slope base.

[0056] Second, anti-seepage, diversion and pressure relief in landfills. The one-way drain valve 2 on the membrane has one-way sealing and self-cleaning functions, effectively solving the problems of drain port blockage and water backflow.

[0057] Third, the tunnel's external water drainage and pressure relief operations are all driven by natural pressure, causing minimal damage to the original ecological environment.

[0058] Fourth, special soil engineering reduces the water holding capacity of special soil base; it can discharge part of the groundwater, effectively alleviate the instability problem of special soil caused by changes in soil moisture, and can be used for pressure relief in freeze-thaw and frost-damaged areas.

[0059] Fifth, new reservoirs, landscape rivers, lakes, ponds, and large-scale water diversion projects will be built to serve as exhaust and drainage systems.

[0060] Sixth, anti-seepage lining of pumped storage reservoir, and reverse support solution for crevice water and groundwater.

[0061] The technical indicators of the three-dimensional composite one-way drainage anti-seepage membrane are as follows:

[0062] One-way anti-clogging valve water permeability assessment: NB / T 10511-2021

[0063] One-way anti-clogging drain valve anti-seepage: implementation standard GB / T50600-2020

[0064] Filament composite geomembrane: Implementation standard GB / T17642-2008 Three-dimensional water and air guide mesh: Implementation standard CJ / T 452-2014

[0065]

[0066] The test report is as follows:

[0067]

[0068]

[0069] Detailed explanation of the construction plan for river channel regulation concrete lining

[0070] In river regulation projects, concrete lining construction is a critical step in ensuring structural stability and proper drainage. The following article examines the key construction points and intricate principles behind the three-dimensional one-way anti-clogging valve (compatible with 40mm drain pipes), a core component of this solution.

[0071] Component composition and function

[0072] Reference Figure 3 The three-dimensional geomembrane water and air guide net acts as the vanguard of the drainage system. The geomembrane possesses excellent water permeability and filterability, effectively blocking large impurities such as silt from entering the drainage pipe while allowing water and air to flow smoothly through the one-way drain valve 2 and then exit. The three-dimensional water and air guide net further optimizes the water and air flow paths. Its unique three-dimensional structure increases the contact area with water, guiding water to flow in an orderly manner toward the drainage anti-clogging valve, improving drainage efficiency and preventing localized water accumulation.

[0073] Reference Figure 4 The anti-clogging valve outlet gap, indicated by the arrow, is a critical drainage channel. Its design has been meticulously considered, with the gap size ensuring smooth water flow while preventing larger impurities from entering the pipe and impacting drainage. After being guided by the three-dimensional water and air guide network of the composite geomembrane, the water flows out of these gaps in an orderly manner, completing the drainage process. Its unique shape and layout, combined with the fluid dynamics design within the valve, maintain a reasonable flow rate during outflow, reducing the possibility of impurities accumulating in the gaps.

[0074] Reference Figure 5 , construction protection measures

[0075] During concrete lining construction, ensuring the proper function of the anti-clogging valve is crucial. If concrete accidentally falls into the pipe during pouring, it can severely obstruct drainage. Therefore, a simple plastic film is applied to the 40-meter drainage pipe for protection. This simple yet effective measure, like a protective layer for the valve, effectively blocks concrete and other construction debris from entering the valve and pipe, ensuring unobstructed drainage. This avoids the tedious work and increased costs associated with cleaning out foreign matter later, and ensures the long-term stable operation of the drainage system throughout the river management project.

[0076] Through the rational design of each component and meticulous protection during the construction process, the three-dimensional one-way drainage and anti-clogging valve system in this river management concrete lining construction plan can efficiently achieve drainage and anti-clogging functions in complex river environments, laying a solid foundation for river management projects.

[0077] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. Three-dimensional composite one-way drainage anti-seepage membrane, characterized in that: include: Lower geotextile (6); A three-dimensional net (4) is provided at the bottom of the lower geotextile (6); An upper geotextile (1) is arranged above the lower geotextile (6); The geomembrane (3) is arranged between the lower geotextile (6) and the upper geotextile (1); a water duct (5) is formed between the three-dimensional net (4) and the geomembrane (3); A one-way drainage valve (2) is provided on the geomembrane (3) and is matched with the water duct (5); The one-way drainage valve (2) comprises a lower cover (10) arranged on the geomembrane (3), and an upper cover (11) is arranged on the top of the lower cover (10), a guide fence (12) is arranged on the inner side of the upper cover (11), and a soft protective ring shield silicone pad (13) coupled with the guide fence (12) is arranged inside the lower cover (10); a water inlet channel (14) is provided at the bottom of the lower cover (10), and a water outlet channel (15) is provided around the upper cover (11); The lower geotextile (6) and the three-dimensional net (4) contact the seepage water. The three-dimensional net (4) guides the water flow in an orderly manner through the water guide duct (5) to the one-way drainage valve (2) and then to the water inlet channel (14). When the water level difference between the inside and outside reaches 5-10 cm to form pressure water and generate uplift pressure, the soft protective ring shield silicone pad (13) is subjected to an upward supporting force. The soft protective ring shield silicone pad (13) moves upward, so that the water inlet channel (14) and the water outlet channel (15) are connected. At this time, water enters from the water inlet channel (14) and is discharged from the water outlet channel (15) and discharged 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 an upward supporting force and will return to its original position, disconnecting the connection between the water inlet channel (14) and the water outlet channel (15). It is in a sealed state and no water is discharged downward. The one-way drainage valve (2) is closed and does not leak downward, playing a check function.

2. The three-dimensional composite one-way drainage and anti-seepage membrane according to claim 1, characterized in that: The lower geotextile (6) is used to block large particles of impurities, while allowing water and gas to smoothly enter the one-way drainage valve (2) and then be discharged from the one-way drainage valve (2).

3. The three-dimensional composite one-way drainage and anti-seepage membrane according to claim 1, characterized in that: The three-dimensional net (4) is used to optimize the water flow and air flow paths, and increases the contact area with water through the three-dimensional structure.

4. The three-dimensional composite one-way drainage and anti-seepage membrane according to claim 1, characterized in that: The three-dimensional network (4) is arranged in an array.

5. The three-dimensional composite one-way drainage and anti-seepage membrane according to claim 1, characterized in that: During the drainage process, water enters from the bottom water inlet channel (14) of the one-way drainage valve (2), rises to the top of the one-way drainage valve (2), and is discharged from the periphery of the one-way drainage valve (2). External impurities cannot enter the one-way drainage valve (2), thereby playing a role in preventing clogging.

6. The three-dimensional composite one-way drainage and anti-seepage membrane according to claim 1, characterized in that: The interior of the flexible ring shield silicone pad (13) is composed of 361 stainless steel plates.

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