Impermeable layer for preventing soil pollution

Abstract

The utility model provides an impermeable layer for preventing soil pollution, and relates to the technical field of soil pollution prevention, the impermeable layer comprises an upper supporting layer, a collecting layer, a protective layer, a geomembrane, a clay layer, a pressure reduction layer and a lower supporting layer, the protective layer is arranged on the upper surface of the geomembrane, the collecting layer is arranged on the top of the protective layer, and the clay layer is arranged on the bottom of the protective layer. An upper supporting layer is connected to the upper portion of the collecting layer, and a clay layer is arranged on the lower surface of the geomembrane. Compared with the prior art, the water pump structure is additionally arranged on the impermeable layer for preventing soil pollution, so that the function of discharging leachate is realized, the leachate is prevented from being accumulated on the impermeable layer to increase the load of the impermeable layer and accelerate aging and damage of the impermeable layer, the service life of the impermeable layer is directly shortened, and the service life of the impermeable layer is prolonged. The maintenance cost is improved; when the impermeable layer for preventing the soil pollution is used, the impermeable layer for preventing the soil pollution can prevent underground water from causing large pressure on the whole impermeable layer for preventing the soil pollution.

Description

Technical Field

[0001] The utility model relates to the technical field of preventing soil pollution, and particularly relates to an anti-seepage layer for preventing soil pollution. Background Art

[0002] An anti-seepage layer for preventing soil pollution is an important part of environmental protection projects. Especially in facilities that may generate pollutants such as landfills and hazardous waste storage depots, the role of the anti-seepage layer is particularly crucial. The anti-seepage layer usually consists of multiple layers to ensure its anti-seepage effect and stability. The structure of the anti-seepage layer is tightly connected, simple to use, convenient for regular inspection and maintenance, ensuring its long-term effectiveness. The anti-seepage layer is widely used in places that need to prevent soil pollution. Landfill: preventing landfill leachate from polluting soil and groundwater. An anti-seepage layer for preventing soil pollution is one of the important measures in environmental protection projects. Through reasonable structural design and material selection, it can effectively prevent pollutants from flowing into the soil, protecting the environment and human health;

[0003] After retrieval, the utility model with the publication number CN207484527U discloses an anti-seepage layer for preventing soil pollution. Although this utility model patent solves the problems that the current anti-seepage layer for preventing soil pollution has poor anti-seepage effect, does not have good heat resistance and cold resistance, cannot improve the quality of the anti-seepage layer, is easy to be damaged, resulting in poor filtration effect and weak practicability; however, this utility model patent has the following problems:

[0004] First, the garbage in the landfill is buried for a long time, causing the landfill leachate to gradually accumulate at the bottom of the garbage, that is, on the anti-seepage layer. The landfill leachate and accumulated liquid accumulate on the anti-seepage layer, increasing the load on the anti-seepage layer, accelerating its aging and damage, directly shortening the service life of the anti-seepage layer and increasing the maintenance cost;

[0005] Second, the structure of the covered utility model is single. After heavy rain, when the groundwater level changes rapidly, the groundwater level rises rapidly, causing the moisture saturation in the soil to change, and then generating pressure on the anti-seepage layer, which may eventually cause the anti-seepage layer to be damaged;

[0006] Therefore, an anti-seepage layer for preventing soil pollution is proposed. Utility Model Content

[0007] In view of this, the utility model provides an anti-seepage layer for preventing soil pollution to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0008] The technical solution of the utility model is realized as follows: An anti-seepage layer for preventing soil pollution includes an upper support layer, a collection layer, a protection layer, a geomembrane, a clay layer, a pressure relief layer and a lower support layer. A protection layer is arranged on the upper surface of the geomembrane, a collection layer is installed on the top of the protection layer, an upper support layer is connected above the collection layer, a clay layer is arranged on the lower surface of the geomembrane, a pressure relief layer is arranged at the bottom of the clay layer, and a lower support layer is arranged below the pressure relief layer.

[0009] Further preferably, penetration holes are formed inside the upper support layer, and filter nets are fixedly connected inside the penetration holes.

[0010] Further preferably, collection grooves are formed inside the collection layer. A water collection tank is arranged on one side of the collection layer. A water pump is fixedly connected to the upper surface of the water collection tank. The drainage port of the water pump is communicated with the water collection tank, the water suction port of the water pump is communicated with a sewage discharge pipe, and the end of the sewage discharge pipe away from the water pump is communicated with the collection groove.

[0011] Further preferably, a water outlet pipe is communicated with the upper surface of the water collection tank.

[0012] Further preferably, the pressure relief layer includes a first support plate. Drainage grooves are formed on the lower surface of the first support plate. Support columns are uniformly fixedly connected to the lower surface of the drainage grooves, and a second support plate is fixedly connected to the bottom of the support columns.

[0013] Further preferably, the second support plate has a layered structure with a thick middle and thin edges.

[0014] Due to the adoption of the above technical solution in the embodiment of the utility model, it has the following advantages:

[0015] First, by adding a water pump structure to the anti-seepage layer for preventing soil pollution, the function of discharging leachate is realized. That is, when leachate seeps out from the garbage buried on the anti-seepage layer for preventing soil pollution, the leachate passes through the penetration holes and the filter nets and is collected in the collection grooves. The staff starts the water pump according to the actual situation. The water pump collects the leachate into the water collection tank through the sewage discharge pipe for unified treatment, preventing the leachate from accumulating on the anti-seepage layer, increasing the load of the anti-seepage layer, accelerating its aging and damage, directly shortening the service life of the anti-seepage layer, and increasing the maintenance cost.

[0016] Second, when the anti-seepage layer for preventing soil pollution of the utility model is in use, first pour the clay layer, then lay the geomembrane, and then lay the protection layer to protect the geomembrane, which is beneficial to protecting the geomembrane. And when the groundwater level rises rapidly, the seeping groundwater accumulates between the first support plate and the second support plate, preventing the groundwater from causing a large pressure on the overall anti-seepage layer for preventing soil pollution and causing damage to the anti-seepage layer for preventing soil pollution.

[0017] The above summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall partial internal sectional structure of the present utility model;

[0020] Figure 2 It is a schematic diagram of the sectional structure of the present utility model;

[0021] Figure 3 It is a schematic diagram of the collection layer structure of the present utility model;

[0022] Figure 4 It is a schematic diagram of the lower support layer structure of the present utility model.

[0023] Reference numerals: 1, upper support layer; 101, penetration holes; 102, filter screen; 2, collection layer; 201, collection tank; 202, water collection tank; 203, water pump; 204, sewage pipe; 205, water outlet pipe; 3, protective layer; 4, geomembrane; 5, clay layer; 7, decompression layer; 701, support plate 1; 702, drainage groove; 703, support column; 704, support plate 2; 8, lower support layer. Detailed Description of the Embodiments

[0024] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0025] The following will describe the embodiments of the present utility model in detail with reference to the accompanying drawings.

[0026] As Figures 1-4As shown in the figure, an embodiment of the present utility model provides an anti-seepage layer for preventing soil pollution, which includes an upper support layer 1, a collection layer 2, a protection layer 3, a geomembrane 4, a clay layer 5, a decompression layer 7, and a lower support layer 8. A protection layer 3 is arranged on the upper surface of the geomembrane 4, a collection layer 2 is installed on the top of the protection layer 3, an upper support layer 1 is connected above the collection layer 2, a clay layer 5 is arranged on the lower surface of the geomembrane 4, a decompression layer 7 is arranged at the bottom of the clay layer 5, and a lower support layer 8 is arranged below the decompression layer 7.

[0027] In one embodiment, penetration holes 101 are formed inside the upper support layer 1, and a filter screen 102 is fixedly connected inside the penetration holes 101.

[0028] In one embodiment, a collection groove 201 is formed inside the collection layer 2, a water collection tank 202 is arranged on one side of the collection layer 2, a water pump 203 is fixedly connected to the upper surface of the water collection tank 202. The drain outlet of the water pump 203 is communicated with the water collection tank 202, and the suction port of the water pump 203 is communicated with a sewage discharge pipe 204. One end of the sewage discharge pipe 204 away from the water pump 203 is communicated with the collection groove 201. The garbage leachate is collected in the collection groove 201, and the water pump 203 pumps out the garbage leachate in the collection groove 201 to prevent the potential pollution risk of the soil and groundwater caused by liquid accumulation.

[0029] In one embodiment, a water outlet pipe 205 is communicated with the upper surface of the water collection tank 202. The staff takes out the garbage leachate collected in the water collection tank 202 through the water outlet pipe 205 for purification treatment. The decompression layer 7 includes a first support plate 701, a drainage groove 702 is formed on the lower surface of the first support plate 701, support columns 703 are uniformly fixedly connected to the lower surface of the drainage groove 702, and a second support plate 704 is fixedly connected to the bottom of the support columns 703. The second support plate 704 has a layered structure with a thick middle and a thin edge. The water pump 203 is electrically connected to an external power supply. The water pump 203 adopted in this application is a prior art, and the connections between various components are also prior arts. Therefore, the connections and working principles will not be elaborated here too much.

[0030] When the utility model is in operation: when anti-seepage is required through the anti-seepage layer for preventing soil pollution, a pit is dug, and a concrete lower support layer 8 is built at the bottom of the pit as a support. Subsequently, a second support plate 704, support columns 703 and a first support plate 701 are built on the dry lower support layer 8. Then, a clay layer 5 is poured, and a geomembrane 4 is laid. Subsequently, a protective layer 3 is laid to protect the geomembrane 4. Then, a collection layer 2 is built. Subsequently, an upper support layer 1 is installed. When the groundwater level rises rapidly, the seeping groundwater accumulates between the first support plate 701 and the second support plate 704, preventing the groundwater from exerting a large pressure on the entire anti-seepage layer for preventing soil pollution and causing damage to the anti-seepage layer for preventing soil pollution. When the water level drops, the groundwater spreads to both sides of the anti-seepage layer for preventing soil pollution along the drainage channels 702 and 702; when the landfill waste on the anti-seepage layer for preventing soil pollution oozes leachate, the leachate passes through the permeation holes 101 and the filter screen 102 and is collected in the collection tank 201. The staff starts the water pump 203 according to the actual situation. The water pump 203 collects the leachate into the water collection tank 202 through the sewage pipe 204 for unified treatment, preventing the leachate from accumulating on the anti-seepage layer and increasing the load of the anti-seepage layer, accelerating its aging and damage, directly shortening the service life of the anti-seepage layer and increasing the maintenance cost.

[0031] The above is only the specific implementation manner of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the utility model can easily think of various changes or substitutions, and these should all be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claimed rights.

Claims

1. An anti-seepage layer for preventing soil pollution, characterized in that: The invention comprises an upper supporting layer (1), a collecting layer (2), a protective layer (3), a geomembrane (4), a clay layer (5), a pressure reducing layer (7) and a lower supporting layer (8), wherein the upper surface of the geomembrane (4) is provided with a protective layer (3), the top of the protective layer (3) is provided with a collecting layer (2), the upper part of the collecting layer (2) is connected to the upper part of the collecting layer (1), the lower surface of the geomembrane (4) is provided with a clay layer (5), the bottom of the clay layer (5) is provided with a pressure reducing layer (7), and the lower supporting layer (8) is provided below the pressure reducing layer (7).

2. The anti-seepage layer for preventing soil pollution according to claim 1, characterized in that: A permeation hole (101) is provided inside the upper support layer (1), and a filter screen (102) is fixedly connected inside the permeation hole (101).

3. The anti-seepage layer for preventing soil pollution according to claim 1, characterized in that: A collecting trough (201) is provided inside the collecting layer (2), a water collecting box (202) is provided on one side of the collecting layer (2), a water pump (203) is fixedly connected to the upper surface of the water collecting box (202), a discharge port of the water pump (203) is connected to the water collecting box (202), a water intake port of the water pump (203) is connected to a sewage pipe (204), and an end of the sewage pipe (204) away from the water pump (203) is connected to the collecting trough (201).

4. The anti-seepage layer for preventing soil pollution according to claim 3, characterized in that: The upper surface of the water collecting tank (202) is connected to a water outlet pipe (205).

5. The anti-seepage layer for preventing soil pollution according to claim 1, characterized in that: The pressure reducing layer (7) comprises a support plate 1 (701), a drainage groove (702) is provided on the lower surface of the support plate 1 (701), a support column (703) is evenly and fixedly connected to the lower surface of the drainage groove (702), and a support plate 2 (704) is fixedly connected to the bottom of the support column (703).

6. The anti-seepage layer for preventing soil pollution according to claim 5, characterized in that: The second support plate (704) is a layered structure that is thick in the middle and thin at the edges.

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