Bottom anti-seepage structure of refuse landfill

Abstract

The utility model relates to the technical field of refuse landfill seepage prevention, in particular to a refuse landfill bottom seepage prevention structure which is characterized in that a concrete pouring layer is arranged on the inner wall of a refuse landfill foundation pit in a pouring mode, and a seepage prevention film layer is installed on the inner wall of the concrete pouring layer. A stone brick building table is installed on the outer edge of the bottom end of the interior of the impermeable film layer, filter screens are installed at the bottom end of the interior of the stone brick building table and the top of the stone brick building table correspondingly, and the portion, located between the adjacent sides of the filter screens, in the stone brick building table is filled with a hydrophobic sand gravel layer; according to the landfill leachate treatment device, the structure is simple, the landfill leachate can be conveniently subjected to multi-layer filtration and centralized dredging for use, and the filtered and dredged landfill leachate can be efficiently discharged, so that the landfill leachate is effectively prevented from being accumulated to corrode the impermeable film layer, and the landfill leachate treatment device has the advantages that the landfill leachate treatment device is simple in structure, convenient to use and high in practicability. And the anti-seepage performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of landfill anti-seepage, in particular to an anti-seepage structure at the bottom of a landfill. Background Technique

[0002] The anti-seepage structure of a landfill is an important part of a solid waste landfill, which is used to isolate the inside and outside of the landfill to prevent leachate from polluting groundwater and surface water.

[0003] In the existing anti-seepage structure at the bottom of a landfill, it is not convenient to conduct multi-layer filtration and centralized diversion of the leachate of the landfill waste, and to efficiently discharge the filtered and diverted landfill waste leachate, so it is impossible to effectively avoid the accumulation and corruption of the landfill waste leachate on the anti-seepage membrane layer, thereby affecting the anti-seepage performance. Content of the Utility Model

[0004] The purpose of the utility model is to provide an anti-seepage structure at the bottom of a landfill to improve the anti-seepage structure at the bottom of the landfill, which is convenient for multi-layer filtration and centralized diversion of the leachate of the landfill waste, and to efficiently discharge the filtered and diverted landfill waste leachate, so as to effectively avoid the accumulation and corruption of the landfill waste leachate on the anti-seepage membrane layer and improve the anti-seepage performance, so as to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an anti-seepage structure at the bottom of a landfill, including a landfill foundation pit, a concrete pouring layer is poured and arranged on the inner wall of the landfill foundation pit, an anti-seepage membrane layer is installed on the inner wall of the concrete pouring layer, a stone brick platform is installed on the outer edge of the inner bottom end of the anti-seepage membrane layer, filter nets are installed on both the inner bottom end and the top of the stone brick platform, a hydrophobic gravel layer is filled between the adjacent sides of the filter nets inside the stone brick platform, a geotextile is installed between the top of the filter net and the inner wall of the anti-seepage membrane layer, and a drainage pump is installed on one side of the top of the landfill foundation pit.

[0006] As a preferred scheme of the utility model, the landfill foundation pit is specifically a trapezoidal deep pit structure formed by excavating and tamping the soil layer.

[0007] As a preferred scheme of the utility model, the anti-seepage membrane layer is specifically made of polyethylene geomembrane.

[0008] As a preferred scheme of the utility model, a plurality of drainage pumps are evenly distributed at equal intervals along one side of the landfill foundation pit. One ends of the plurality of drainage pumps all penetrate through the concrete pouring layer and extend to the inside of the anti-seepage membrane layer to install embedded pumping pipelines, and the other ends of the plurality of drainage pumps are installed with drain pipes.

[0009] As a preferred solution of the present invention, the stone brick platform is stacked in a U-shaped structure, and the specific height of the stone brick platform is the sum of the total thickness of a filter screen and a hydrophobic gravel layer.

[0010] As a preferred solution of the present invention, the hydrophobic gravel layer specifically uses clean medium and coarse gravel with a mud content of no more than 5%, and the total thickness of the hydrophobic gravel layer is preferably 300 mm, and the particle size is 5 mm to 10 mm.

[0011] As a preferred solution of the present invention, there are two filter screens.

[0012] Beneficial effect: With regard to the prior art landfill bottom anti-seepage structure, it is not convenient to carry out multi-layer filtration and centralized drainage of the seepage of landfill garbage and to carry out efficient removal treatment of the filtered and drained landfill seepage, thereby being unable to effectively avoid the accumulation of landfill seepage and the corrosion of the anti-seepage membrane layer, thereby affecting the anti-seepage performance. In the utility model, a concrete pouring layer with an anti-seepage membrane layer is provided to carry out anti-seepage treatment of the seepage of landfill garbage, and at the same time, a stone brick platform with a mouth-shaped structure is provided to install two filter screens with a hydrophobic gravel layer between them, and a filter screen provided on the upper layer of the hydrophobic gravel layer is provided. The geotextile installed between the filter screen and the inner wall of the anti-seepage membrane layer can perform multi-layer filtration and centralized drainage of the seepage of landfill garbage, and through the multiple pre-buried pumping pipes, the filtered and drained buried garbage seepage can be efficiently discharged and processed under the drive of the drainage pump, which can effectively prevent the accumulation of buried garbage seepage and the corrosion of the anti-seepage membrane layer, thereby ensuring the anti-seepage effect. The overall structure is simple and convenient for multi-layer filtration and centralized drainage of the seepage of landfill garbage and the efficient discharge of the filtered and drained buried garbage seepage, thereby effectively preventing the accumulation of buried garbage seepage and the corrosion of the anti-seepage membrane layer, improving the anti-seepage performance, and is very practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a schematic diagram of the overall structure of a landfill bottom anti-seepage structure.

[0014] Figure 2 This is a schematic diagram of the partially disassembled structure of a landfill bottom anti-seepage structure according to the present utility model.

[0015] Figure 3 This is an overall top view of an anti-seepage structure at the bottom of a landfill according to the present invention.

[0016] In the figure: 1. Landfill foundation pit; 2. Concrete pouring layer; 3. Anti-seepage membrane layer; 4. Drainage pump; 41. Pre-buried pumping pipe; 42. Drainage pipe; 5. Stone brick platform; 6. Hydrophobic gravel layer; 7. Filter net; 8. Geotextile. DETAILED DESCRIPTION

[0017] Please refer to Figures 1 - 3 , a bottom anti-seepage structure of a landfill of the present utility model includes a landfill foundation pit 1. A concrete casting layer 2 is cast and provided on the inner wall of the landfill foundation pit 1. An anti-seepage membrane layer 3 is installed on the inner wall of the concrete casting layer 2. A stone brick platform 5 is installed on the outer edge of the inner bottom end of the anti-seepage membrane layer 3. Filter meshes 7 are installed at both the inner bottom end and the top of the stone brick platform 5. There are two filter meshes 7 in total. A hydrophobic gravel layer 6 is filled and provided between the adjacent sides of the filter meshes 7 inside the stone brick platform 5. A geotextile 8 is installed between the top of the filter mesh 7 and the inner wall of the anti-seepage membrane layer 3. A drainage pump 4 is installed on one side of the top of the landfill foundation pit 1.

[0018] Specifically, the landfill foundation pit 1 is specifically a trapezoidal deep pit structure formed by tamping after excavating the soil layer. The anti-seepage membrane layer 3 is specifically made of polyethylene geomembrane. The stone brick platform 5 is arranged and piled up in a square structure. And the specific height of the stone brick platform 5 is the sum of the total thickness of one filter mesh 7 and the hydrophobic gravel layer 6. The hydrophobic gravel layer 6 is specifically made of clean medium and coarse gravel with a mud content of not more than 5%. And the total thickness of the hydrophobic gravel layer 6 is preferably 300 mm, and the particle size is 5 mm - 10 mm. By setting the concrete casting layer 2 with the anti-seepage membrane layer 3, the seepage liquid of the landfill waste can be subjected to anti-seepage treatment. At the same time, by setting the stone brick platform 5 piled up in a square structure and installing two filter meshes 7 with a hydrophobic gravel layer 6 arranged between them, and cooperating with the geotextile 8 installed between the upper layer of the hydrophobic gravel layer 6 and the inner wall of the anti-seepage membrane layer 3, the seepage liquid of the landfill waste can be filtered in multiple layers and centrally guided for use.

[0019] A plurality of drainage pumps 4 are distributed at equal intervals along one side of the landfill foundation pit 1. One ends of the plurality of drainage pumps 4 all penetrate through the concrete casting layer 2 and extend to the inside of the anti-seepage membrane layer 3 to install embedded pumping pipelines 41. And the other ends of the plurality of drainage pumps 4 are installed with drain pipes 42. And through the plurality of embedded pumping pipelines 41 provided, under the drive of the drainage pump 4, the filtered and guided seepage liquid of the landfill waste can be efficiently discharged, which can effectively prevent the seepage liquid of the landfill waste from accumulating and corroding the anti-seepage membrane layer 3, thereby ensuring the anti-seepage effect.

[0020] In summary, the present utility model is not only simple in structure but also convenient for multi-layer filtering and centralized guiding of the seepage liquid of the landfill waste and for efficiently discharging the filtered and guided seepage liquid of the landfill waste, thereby effectively preventing the seepage liquid of the landfill waste from accumulating and corroding the anti-seepage membrane layer and improving the anti-seepage performance, which is very practical.

[0021] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An anti-seepage structure at the bottom of a landfill, comprising a landfill foundation pit (1), characterized in that : A concrete casting layer (2) is cast and provided on the inner wall of the landfill foundation pit (1). An anti-seepage membrane layer (3) is installed on the inner wall of the concrete casting layer (2). A stone brick platform (5) is installed on the outer edge of the inner bottom end of the anti-seepage membrane layer (3). Filter meshes (7) are installed at both the inner bottom end and the top of the stone brick platform (5). A hydrophobic gravel layer (6) is filled and provided between the adjacent sides of the filter meshes (7) inside the stone brick platform (5). A geotextile (8) is installed between the top of the filter mesh (7) and the inner wall of the anti-seepage membrane layer (3). A drainage pump (4) is installed on one side of the top of the landfill foundation pit (1).

2. The anti-seepage structure at the bottom of a landfill according to claim 1, characterized in that: The landfill foundation pit (1) is specifically a trapezoidal deep pit structure formed by excavating and ramming the soil layer.

3. A bottom anti-seepage structure of a landfill according to claim 1, characterized in that: The anti-seepage membrane layer (3) is specifically made of polyethylene geomembrane.

4. A bottom anti-seepage structure of a landfill according to claim 1, characterized in that: A plurality of the drainage pumps (4) are distributed at equal intervals along one side of the landfill foundation pit (1). One ends of the plurality of drainage pumps (4) all penetrate through the concrete casting layer (2) and extend to the inside of the anti-seepage membrane layer (3) to install embedded pumping pipelines (41), and the other ends of the plurality of drainage pumps (4) are installed with drain pipes (42).

5. The anti-seepage structure at the bottom of a landfill according to claim 1, characterized in that: The stone brick platform (5) is arranged and piled up in a square-shaped structure, and the specific height of the stone brick platform (5) is the sum of the total thicknesses of one filter mesh (7) and the hydrophobic gravel layer (6).

6. The anti-seepage structure at the bottom of a landfill site according to claim 1, characterized in that: The hydrophobic gravel layer (6) is specifically made of clean medium and coarse gravel with a mud content not greater than 5%. The total thickness of the hydrophobic gravel layer (6) is preferably 300 mm, and the particle size is 5 mm to 10 mm.

7. A bottom anti-seepage structure of a landfill according to claim 1, characterized in that: There are two filter meshes (7) in total.

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