A geomembrane impermeable structure

Abstract

The application relates to the technical field of anti-seepage geomembranes, and discloses an anti-seepage geomembrane structure, which comprises a base body, a composite geomembrane body, an upper cushion layer and a protective layer are sequentially arranged on the top of the base body from bottom to top. The anti-seepage geomembrane structure is provided with a combined structure of a drainage ditch and a drainage groove, can quickly collect and discharge the accumulated liquid under the composite geomembrane body, and when the accumulated liquid is generated, can flow into the drainage ditch along the slope of the top of the base body. The angle slope design in the drainage ditch can further accelerate the water flow speed, the accumulated liquid can quickly flow to the output end at the bottom end, and then be discharged into the drainage groove. The drainage groove can collect and guide the discharge, and the collected accumulated liquid can be uniformly transported to an external drainage system, so that the accumulated liquid can be prevented from being retained under the membrane for a long time.

Description

Technical Field

[0001] This application relates to the field of impermeable geomembrane technology, specifically to an impermeable geomembrane structure. Background Technology

[0002] As an important geosynthetic material, geomembrane is widely used in seepage prevention in water conservancy projects, environmental engineering (such as landfills), municipal engineering and other fields. Traditional geomembrane seepage prevention structures are usually single-layer membranes or multi-layer simple composite structures, and their main function is to prevent liquid or gas penetration.

[0003] A current patent (publication number: CN217948947U) discloses a composite geomembrane with a layered seepage reduction structure, including a base surface, a concrete slab on top of the base surface, a first geomembrane on top of the concrete slab, a geotextile inside the first geomembrane, a second geomembrane on top of the geotextile, a layer of fine sand on top of the second geomembrane, and steel plate strips at both the front and back ends of the top of the second geomembrane. This invention solves the problem of existing composite geomembranes lacking a layered structure, leading to easy seepage and damage in channels, by having the user lay a concrete slab on the base surface, then lay the first geomembrane on the surface of the concrete slab, then layer a geotextile on top of the first geomembrane, and finally layer a second geomembrane on top of the existing geotextile. This increases the safety and practicality of the composite geomembrane.

[0004] Although the device in the aforementioned comparative document solves the problem that existing composite geomembranes do not have a layered function, which makes them prone to seepage and damage during channel use, the structure of this solution is relatively complex, the construction efficiency is low, and it does not fully consider complex terrain conditions, and fails to effectively solve the problem of drainage of liquid accumulated under the membrane during use. To solve the above problems, a motor end cap assembly fixture is proposed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a geomembrane impermeable structure with advantages such as high-efficiency drainage capacity. This solves the problem in existing technologies where composite geomembranes suffer from decreased structural stability and weakened impermeability due to the inability to timely drain liquid accumulated under the membrane in complex terrain conditions.

[0006] To achieve the above objectives, this application provides the following technical solution: a geomembrane impermeable structure, comprising a substrate, wherein a composite geomembrane body, an upper cushion layer and a protective layer are sequentially laid on the top of the substrate from bottom to top;

[0007] The top of the substrate has multiple drainage ditches, one side of each drainage ditch has a drainage channel, and one side of each drainage channel has an anchoring channel. One side of the composite geomembrane body is fixedly connected to the anchoring channel. The output end of the drainage ditch is located on the inner side of the drainage channel. The drainage ditch has an angled slope inside, and its bottom end is arranged at the water output end.

[0008] The above scheme, through the combination of drainage ditches and drainage channels, can quickly collect and drain the liquid accumulated under the composite geomembrane. When the liquid is generated, it will flow into the drainage ditch along the slope of the top of the substrate. The angle and slope design inside the drainage ditch can further accelerate the water flow speed, allowing the liquid to quickly flow to its bottom outlet and then into the drainage channel. By setting up the drainage channel, it can play a role in centralized collection and guided discharge, and can uniformly transport the collected liquid to the external drainage system, thereby avoiding the liquid from staying under the membrane for a long time. At the same time, the anchoring groove can fix the composite geomembrane body, ensuring that the geomembrane will not shift due to water flow impact or terrain changes during the drainage process, thus ensuring the stability of the entire impermeable structure.

[0009] Furthermore, both the drainage ditch and the drainage channel are coated with a waterproof coating.

[0010] The above solution effectively enhances the impermeability of drainage ditches and troughs by applying a waterproof coating. This prevents liquid from seeping into the substrate or anchoring trench through gaps in the ditch or trough during flow. The waterproof coating adheres tightly to the inner wall surface of the drainage ditch and trough, forming a continuous and dense protective film that prevents moisture from directly contacting the substrate of the ditch or trough.

[0011] Furthermore, the composite geomembrane body includes a main impermeable layer in the middle, and a lower geotextile layer and an upper geotextile layer are respectively composited on the upper and lower sides of the main impermeable layer.

[0012] The above scheme utilizes a main geotextile layer to effectively prevent seepage and block liquid penetration. The lower geotextile layer provides protection and support for the main geotextile layer, preventing it from being worn or damaged by direct contact with the substrate. The upper geotextile layer forms a protective layer on the surface of the composite geomembrane, reducing the impact of external environmental factors on the main geotextile layer.

[0013] Furthermore, the main impermeable layer includes, from top to bottom, a flame-retardant layer, a heat-insulating layer, an impermeable high-density polyethylene layer, and a chemical corrosion-resistant layer.

[0014] The above solutions utilize a flame-retardant layer to suppress combustion reactions when exposed to open flames or high temperatures, providing a safety guarantee for the seepage-proof structure. A heat-insulating layer prevents heat transfer, avoiding adverse effects of external high temperatures on the performance of the underlying seepage-proof layer. A high-density polyethylene seepage-proof layer, with its excellent chemical stability and density, reduces the possibility of liquid penetration, which is crucial for achieving the main seepage-proof function. Finally, a chemical corrosion-resistant layer resists the erosion of various corrosive liquids, protecting the main seepage-proof layer from damage.

[0015] Furthermore, both the upper and lower geotextile layers are needle-punched nonwoven geotextiles.

[0016] The above scheme, by setting needle-punched nonwoven geotextile, has a uniformly distributed three-dimensional pore structure inside, which can enhance the friction with adjacent structural layers, improve the stability of the overall structure, and at the same time have good water permeability, which can drain accumulated water in time and avoid structural layer aging caused by long-term water immersion.

[0017] Furthermore, a grid layer is provided at the bottom of the lower geotextile layer.

[0018] The above scheme utilizes a grid layer, whose high-strength mesh structure can disperse the load transmitted by the upper structural layer and distribute the pressure evenly. At the same time, the grid layer can enhance the interlocking force with the base soil, thereby improving the load-bearing capacity and tensile performance of the entire impermeable structure.

[0019] Furthermore, the upper cushion layer is composed of permeable gravel, and the protective layer can be one of the following: vegetation mat, dry-laid stone, or concrete slab.

[0020] The above scheme uses highly permeable gravel to quickly drain rainwater or other liquids that have seeped in from above, preventing moisture from accumulating in the structural layer. The protective layer can be made of vegetation mats, dry-laid stone, or concrete slabs, which can be flexibly selected according to the needs of the actual use scenario. Vegetation mats not only provide protection but also further stabilize the surface soil through plant growth. Dry-laid stone and concrete slabs have strong impact resistance and can withstand direct damage to the underlying structural layer from external mechanical crushing or natural environmental factors.

[0021] Furthermore, one side of the composite geomembrane body is fixedly connected to the bottom of the anchoring groove by an anchor, and a sealing cap is provided at the top of the anchor.

[0022] The above scheme, by setting anchors, can firmly fix the composite geomembrane body in the anchoring groove, which can prevent the geomembrane from slipping under water pressure or soil displacement, and can ensure the integrity of the anti-seepage structure. The sealing cap can form a sealed protection for the connection between the anchor and the geomembrane, which can prevent water from seeping in from the connection gap.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] This type of geomembrane anti-seepage structure, through the combination of drainage ditches and drainage channels, can quickly collect and discharge the liquid accumulated under the composite geomembrane body. When the liquid is generated, it flows into the drainage ditch along the slope of the top of the substrate. The angle and slope design inside the drainage ditch can further accelerate the water flow speed, allowing the liquid to quickly flow to its bottom outlet and then into the drainage channel. By setting up the drainage channel, it can play a role in centralized collection and guided discharge, and can uniformly transport the collected liquid to the external drainage system, thereby avoiding the liquid from staying under the membrane for a long time. At the same time, the anchoring groove fixes the composite geomembrane body, ensuring that the geomembrane will not shift due to water flow impact or terrain changes during the drainage process, thus ensuring the stability of the entire anti-seepage structure. Attached Figure Description

[0025] Figure 1 This is a frontal three-dimensional structural diagram of this application;

[0026] Figure 2 This is a side-view perspective three-dimensional structural diagram of this application;

[0027] Figure 3 This is a schematic diagram of the structure of the anchor in this application;

[0028] Figure 4 This is a schematic diagram of the drainage channel in this application;

[0029] Figure 5 This is a structural schematic diagram of the cross-section of the composite geomembrane body in this application.

[0030] In the diagram: 1. Substrate; 101. Drainage ditch; 102. Drainage channel; 103. Anchoring channel; 104. Waterproof coating; 2. Composite geomembrane body; 21. Grid layer; 22. Lower geotextile layer; 23. Main impermeable layer; 2301. Chemical corrosion resistant layer; 2302. Impermeable high-density polyethylene layer; 2303. Heat insulation layer; 2304. Flame retardant layer; 24. Upper geotextile layer; 3. Upper cushion layer; 4. Protective layer; 5. Anchor; 501. Sealing cap. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The geomembrane anti-seepage structure in this embodiment includes a substrate 1, and a composite geomembrane body 2, an upper cushion layer 3 and a protective layer 4 are laid on the top of the substrate 1 from bottom to top.

[0033] Multiple drainage ditches 101 are formed on the top of the substrate 1. A drainage channel 102 is formed on one side of each drainage ditch 101, and an anchoring groove 103 is formed on one side of each drainage channel 102. The composite geomembrane body 2 is fixedly connected to the anchoring groove 103 on one side. The output end of the drainage ditch 101 is located on the inner side of the drainage channel 102. The drainage ditch 101 has an angled slope inside, and its bottom end is arranged at the water outlet. By setting up the combined structure of drainage ditch 101 and drainage channel 102, the accumulated liquid under the composite geomembrane body 2 can be quickly collected and discharged. When the accumulated liquid is generated, it will flow into the drainage ditch 101 along the slope of the top of the substrate 1. 1. The angle and slope design inside the drainage ditch 101 can further accelerate the water flow speed, allowing the accumulated liquid to flow quickly to its lowest output end and then into the drainage channel 102. By setting up the drainage channel 102, it can play a role in centralized collection and guided discharge, and can uniformly transport the collected accumulated liquid to the external drainage system, thereby avoiding the accumulation liquid from staying under the membrane for a long time. At the same time, the fixing effect of the anchoring groove 103 on the composite geomembrane body 2 can ensure that the geomembrane will not be displaced due to water flow impact or terrain changes during the drainage process, thus ensuring the stability of the entire anti-seepage structure.

[0034] Please see Figure 2 and Figure 4 Both drainage ditch 101 and drainage channel 102 are coated with a waterproof coating 104. By setting the waterproof coating 104, the impermeability of drainage ditch 101 and drainage channel 102 can be effectively enhanced. It can prevent the accumulated liquid from seeping into the substrate 1 or anchoring channel 103 through the gaps in the ditch or channel during the flow process. The waterproof coating 104 is tightly attached to the inner wall surface of drainage ditch 101 and drainage channel 102, forming a continuous and dense protective film that can prevent water from directly contacting the substrate of the ditch or channel.

[0035] Please see Figure 5The composite geomembrane body 2 includes a main impermeable layer 23 located in the middle. A lower geotextile layer 22 and an upper geotextile layer 24 are respectively composited on the upper and lower sides of the main impermeable layer 23. The main impermeable layer 23 plays a crucial role in preventing seepage, blocking liquid penetration. The lower geotextile layer 22 protects and supports the main impermeable layer 23, preventing it from directly contacting the substrate 1 and being worn or damaged. The upper geotextile layer 24 provides additional protection to the composite geomembrane body 2. The surface forms a protective layer, which can reduce the impact of external environmental factors on the main seepage barrier layer 23. The main seepage barrier layer 23 includes, from top to bottom, a flame-retardant layer 2304, a heat insulation layer 2303, a seepage-proof high-density polyethylene layer 2302, and a chemical corrosion-resistant layer 2301. By setting the flame-retardant layer 2304, the combustion reaction can be inhibited when exposed to open flames or high temperatures, providing a safety guarantee for the seepage barrier structure. By setting the heat insulation layer 2303, heat transfer can be blocked, preventing external high temperatures from affecting the performance of the lower seepage barrier layer. To mitigate adverse effects, a high-density polyethylene (HDPE) layer 2302 is installed. Its excellent chemical stability and density reduce the possibility of liquid penetration, making it crucial for achieving the main seepage prevention function. A chemically resistant layer 2301 is installed to resist the erosion of various corrosive liquids, protecting the main seepage prevention layer 23 from damage. Both the upper geotextile layer 24 and the lower geotextile layer 22 are needle-punched nonwoven geotextiles. These needle-punched nonwoven geotextiles have a uniformly distributed three-dimensional pore structure, enhancing friction with adjacent structural layers and improving the overall structural stability. They also possess good permeability, allowing for timely drainage of accumulated water and preventing structural layer aging due to prolonged immersion. A grid layer 21 is installed at the bottom of the lower geotextile layer 22. This grid layer 21, with its high-strength mesh structure, disperses the load transmitted from the upper structural layers, evenly distributing pressure. Simultaneously, the grid layer 21 enhances the bonding force with the base soil, improving the load-bearing capacity and tensile strength of the entire seepage-proof structure.

[0036] Please see Figure 2 , Figure 3 and Figure 4The upper subbase 3 is composed of highly permeable gravel, and the protective layer 4 can be one of the following: a vegetation mat, dry-laid stone, or a concrete slab. The upper subbase 3, by using highly permeable gravel, can quickly drain rainwater or other liquids that have seeped in from above, preventing moisture accumulation within the structural layer. The protective layer 4 can be flexibly selected from vegetation mats, dry-laid stone, or concrete slabs, depending on the specific application requirements. Vegetation mats not only provide protection but also further stabilize the surface soil through plant growth. Dry-laid stone and concrete slabs offer strong impact resistance and can withstand external forces. To prevent direct damage to the underlying structural layer caused by mechanical compaction or natural environmental factors, the composite geomembrane body 2 is fixedly connected to the bottom of the anchoring groove 103 on one side by anchors 5. A sealing cap 501 is provided at the top of the anchors 5. By setting the anchors 5, the composite geomembrane body 2 can be firmly fixed in the anchoring groove 103, which can prevent the geomembrane from slipping under water pressure or soil displacement, and can ensure the integrity of the anti-seepage structure. The sealing cap 501 can form a seal protection for the connection between the anchors 5 and the geomembrane, which can prevent water from seeping in from the connection gap.

[0037] It should be noted that the flame retardant layer 2304 is preferably an HDPE material with added flame retardant, and the chemical corrosion resistant layer 2301 is preferably a polyethylene with a specific formulation.

[0038] The working principle of the above embodiment is as follows: When in use, the composite geomembrane body 2 is fixedly connected to the anchor groove 103 by the anchor 5, and the gap between the anchor 5 and the composite geomembrane body 2 is sealed by the sealing cap 501. After the connection is completed, the device can be used.

[0039] When liquid seeps into the composite geomembrane body 2, the impermeable high-density polyethylene layer 2302 in the main impermeable layer 23 plays a core barrier role, which can prevent the liquid from seeping further.

[0040] If there is a small amount of permeate or liquid accumulation on the top of the substrate 1, it will flow into the drainage ditch 101 along the slope of the substrate 1. The angle and slope inside the drainage ditch 101 will accelerate the flow to the drainage channel 102, and the liquid will be discharged into the external drainage system through the drainage channel 102 to avoid the accumulation of liquid.

[0041] Meanwhile, the lower geotextile layer 22 can protect the main impermeable layer 23 from abrasion of the substrate 1. The grid layer 21 can distribute the load and enhance the bonding force with the base soil. The upper geotextile layer 24 can reduce the impact of the outside on the main impermeable layer 23. The upper cushion layer 3 can quickly drain the above seepage liquid. The protective layer 4 resists external impact.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A geomembrane impermeable structure, comprising a substrate (1), characterized in that: The top of the substrate (1) is laid with a composite geomembrane body (2), an upper cushion layer (3) and a protective layer (4) from bottom to top. The top of the substrate (1) is provided with multiple drainage ditches (101), a drainage channel (102) is provided on one side of the drainage ditch (101), an anchoring channel (103) is provided on one side of the drainage channel (102), and one side of the composite geomembrane body (2) is fixedly connected to the anchoring channel (103). The output end of the drainage ditch (101) is located on the inner side of the drainage channel (102). The drainage ditch (101) has an angled slope inside, and its bottom end is arranged at the water output end.

2. The geomembrane impermeable structure according to claim 1, characterized in that: Both the drainage ditch (101) and the drainage channel (102) are coated with a waterproof coating (104).

3. The geomembrane impermeable structure according to claim 1, characterized in that: The composite geomembrane body (2) includes a main impermeable layer (23) located in the middle, and a lower geotextile layer (22) and an upper geotextile layer (24) are respectively composited on the upper and lower sides of the main impermeable layer (23).

4. The geomembrane impermeable structure according to claim 3, characterized in that: The main impermeable layer (23) includes, from top to bottom, a flame-retardant layer (2304), a heat insulation layer (2303), an impermeable high-density polyethylene layer (2302), and a chemical corrosion resistant layer (2301).

5. The geomembrane impermeable structure according to claim 3, characterized in that: Both the upper geotextile layer (24) and the lower geotextile layer (22) are needle-punched nonwoven geotextiles.

6. The geomembrane impermeable structure according to claim 3, characterized in that: A grid layer (21) is provided at the bottom of the lower geotextile layer (22).

7. The geomembrane impermeable structure according to claim 1, characterized in that: The upper cushion layer (3) is composed of permeable sand and gravel, and the protective layer (4) can be one of the following: vegetation mat, dry masonry stone, or concrete slab.

8. The geomembrane impermeable structure according to claim 1, characterized in that: The composite geomembrane body (2) is fixedly connected to the bottom of the anchoring groove (103) on one side by an anchor (5), and a sealing cap (501) is provided on the top of the anchor (5).

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