Impermeable film capable of preventing loss of covering soil at top of landfill and closure covering structure

Abstract

The utility model discloses an impermeable film capable of preventing soil covering on the top of a landfill from losing and a closure covering structure, belongs to the technical field of landfill, and aims to solve the problem that an existing closure covering structure is prone to water and soil loss during raining. The impermeable membrane capable of preventing the loss of the covering soil at the top of the landfill comprises soil stopping strips (1) and an impermeable membrane body (2) which are connected up and down, the soil stopping strips (1) extend in the left-right direction, the soil stopping strips (1) are regularly arranged in a staggered mode, and a set distance exists between every two adjacent soil stopping strips (1). Due to the soil stopping strips, the anti-seepage film capable of preventing the covering soil on the top of the landfill from losing can effectively limit sliding of the covering soil, greatly reduce the situation of water and soil loss, maintain integrity of a vegetation planting soil layer and further utilize space resources on the vegetation planting soil layer.

Description

Technical Field

[0001] The utility model relates to the technical field of garbage landfill, in particular to an anti-seepage membrane capable of preventing the top covering soil of a landfill from being lost, and also to a sealing and covering structure of a garbage landfill. Background Art

[0002] Usually in landfills, the landfill cover structure covers the garbage pile. The landfill cover structure contains an exhaust layer, an anti-seepage layer, a drainage layer and a vegetation planting soil layer stacked from bottom to top. Vegetation can be planted on the vegetation planting soil layer. Through on-site investigations of most landfills, it was found that the landfill cover structure is a slope structure. The surface of the anti-seepage layer itself is relatively smooth. Under the scouring of rainwater (especially short-term heavy rainfall), it is very easy to cause soil erosion. Due to construction factors, it is easy to cause uneven covering soil (drainage layer and vegetation planting soil layer), and even landslides, which are serious hazards. Utility Model Content

[0003] In order to solve the problem that the above-mentioned landfill covering structure is prone to soil erosion when it rains, the utility model provides an impermeable membrane and a landfill covering structure that can prevent the loss of the top soil of the landfill. The impermeable membrane that can prevent the loss of the top soil of the landfill is provided with a soil stop strip, which can effectively limit the sliding of the covering soil, greatly reduce soil erosion, maintain the integrity of the vegetation planting soil layer, and can further utilize space resources on the vegetation planting soil layer.

[0004] The technical solution adopted by the embodiment of the utility model to solve the technical problem is:

[0005] A seepage-proof membrane capable of preventing the top soil of a landfill from being lost comprises a soil-stopping strip connected up and down and a seepage-proof membrane body, wherein the soil-stopping strip extends in the left-right direction, a plurality of soil-stopping strips are arranged in regular rows and columns, and a set spacing exists between two adjacent soil-stopping strips.

[0006] The cross-section of the soil stop strip is an inverted T-shaped structure, and the soil stop strip comprises a vertical plate and a bottom plate connected up and down.

[0007] The length of the soil stop strip is 20cm-50cm, the width of the soil stop strip is 10cm-20cm, and the height of the soil stop strip is 10cm-20cm.

[0008] The lower surface of the bottom plate is hot-melt welded or bonded to the upper surface of the anti-permeability membrane body, and the projection of the vertical plate on the anti-permeability membrane body is in a straight line shape, a concave shape, a wavy line shape or a V shape.

[0009] External reinforcing rib plates are arranged in front and rear of the vertical plate, the external reinforcing rib plates extend in the front-rear direction, and the external reinforcing rib plates are connected to both the vertical plate and the bottom plate.

[0010] An inner cavity is arranged in the soil stop strip, and an inner reinforcing rib plate is arranged in the inner cavity, and the inner reinforcing rib plate extends along the front-rear direction.

[0011] A row of soil stop strips contains a plurality of soil stop strips arranged at intervals along the left-right direction, the distance between two adjacent soil stop strips on the left and right is 1m-1.5m, and the distance between two adjacent rows of soil stop strips in the front and back is 1m-1.5m.

[0012] A soil stop strip row includes a plurality of soil stop strips arranged at intervals in the front-to-back direction. In the left-to-right direction, the overlapping distance between two adjacent soil stop strip rows is 1m-1.5m.

[0013] The anti-permeability membrane body comprises a plastic connecting layer, a waterproof material layer and a foaming material layer which are sequentially connected from top to bottom.

[0014] A landfill closure covering structure, wherein the top of the landfill closure covering structure comprises a slope, and the top of the landfill closure covering structure comprises an exhaust layer, an impermeable layer, a drainage layer and a vegetation planting soil layer stacked in sequence from bottom to top, the impermeable layer is the above-mentioned impermeable membrane that can prevent the loss of soil covering the top of the landfill, and the front of the soil stop strip faces the top of the landfill closure covering structure.

[0015] The beneficial effects of the embodiments of the utility model are:

[0016] 1. The soil stop strips can effectively limit the sliding of the covering soil, significantly reduce soil erosion, maintain the integrity of the vegetation planting soil layer, protect the anti-seepage membrane, and extend the service life of the sealing covering structure.

[0017] 2. The integrity of the soil layer for vegetation planting is ensured, the land can be reused for the second time, and other measures with economic and environmental benefits can be implemented on the soil layer for vegetation planting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0019] Figure 1 It is a top view schematic diagram of the anti-seepage membrane capable of preventing the loss of top soil of the landfill when the soil stop strip is a concave structure.

[0020] Figure 2 It is a soil stop edge Figure 1 Schematic cross-sectional view along the AA direction.

[0021] Figure 3 When the soil stop strip is a hollow structure and contains an external reinforcement plate, Figure 1 Schematic cross-sectional view along the AA direction.

[0022] Figure 4 When the soil stop strip is a hollow structure and contains an internal reinforcing rib plate, Figure 1 Schematic cross-sectional view along the AA direction.

[0023] Figure 5 It is a top view schematic diagram of the anti-seepage membrane capable of preventing the loss of top soil of the landfill when the soil stop strip is a V-shaped structure.

[0024] Figure 6 It is an enlarged schematic diagram of multiple soil stop strips arranged in regular rows and columns.

[0025] Figure 7 The anti-seepage membrane that can prevent the top soil loss of the landfill is Figure 1 Schematic diagram of the enlarged cross-section in the AA direction.

[0026] Figure 8 It is a cross-sectional schematic diagram of the landfill closure cover structure.

[0027] Fig. 9 It is a schematic diagram of the anti-seepage membrane capable of preventing the top soil of the landfill from being lost and blocking the downward movement of the soil when the soil stop strip is a concave-shaped structure.

[0028] Fig.10 It is a schematic diagram of the anti-seepage membrane capable of preventing the top soil of the landfill from being lost and blocking the downward movement of the soil when the soil stop strip is a V-shaped structure.

[0029] Fig.11 It is a schematic diagram of the anti-seepage membrane that can prevent the loss of top soil of the landfill from blocking and delaying the downward flow of water when the soil stop strip is a concave structure.

[0030] Fig.12 It is a schematic diagram of the anti-seepage membrane that can prevent the loss of top soil of the landfill from blocking and delaying the downward flow of water when the soil stop strip is a V-shaped structure.

[0031] The following are the descriptions of the reference numerals:

[0032] 1. Soil stop strips; 2. Anti-seepage membrane; 3. Soil stop strip rows; 4. Soil stop strip columns; 5. Garbage pile; 6. Exhaust layer; 7. Anti-seepage layer; 8. Drainage layer; 9. Vegetation planting soil layer; 10. Small retaining area;

[0033] 11. Vertical plate; 12. Bottom plate; 13. External reinforcing rib plate; 14. Internal cavity; 15. Internal reinforcing rib plate;

[0034] 21. Plastic connecting layer; 22. Waterproof material layer; 23. Foaming material layer. DETAILED DESCRIPTION

[0035] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in combination with the embodiments.

[0036] For the convenience of understanding and description, an absolute positional relationship is adopted in the following description of the present utility model. Without special instructions, the orientation word "upper" means the direction perpendicular to the Figure 1 paper surface and pointing outside the paper surface, the orientation word "lower" means the direction perpendicular to the Figure 1 paper surface and pointing inside the paper surface, the orientation word "left" means Figure 1 the left direction in Figure 1 the right direction in Figure 1 the upper side direction in Figure 1 the lower side direction in

[0037] As Figure 1 to Figure 2 shown, a waterproofing membrane capable of preventing the top soil covering of a landfill from being washed away according to an embodiment of the present utility model includes a soil retaining strip 1 and a waterproofing membrane body 2 connected up and down. The soil retaining strip 1 extends substantially in the left-right direction, and a plurality of soil retaining strips 1 are arranged in a regular row-column staggered pattern, and there is a set spacing between two adjacent soil retaining strips 1.

[0038] It can be understood that the main inventive point of the present utility model is that a soil retaining strip 1 is added to the upper surface of the existing waterproofing membrane. The waterproofing membrane body 2 can adopt the existing waterproofing membrane. When in use, the soil retaining strip 1 extends substantially in the left-right direction. The front side of the soil retaining strip 1 faces the top end of the landfill capping structure, and the rear side of the soil retaining strip 1 faces the bottom end of the landfill capping structure. Adding the soil retaining strip 1 can effectively limit the sliding of the soil covering, greatly reduce the soil and water loss, and maintain the integrity of the vegetation planting soil layer.

[0039] As Figure 1 to Figure 2 shown, in order to make the soil retaining strip 1 stable, the cross-section of the soil retaining strip 1 can be an inverted T-shaped structure. The soil retaining strip 1 includes a vertical plate 11 and a bottom plate 12 connected up and down. The vertical plate 11 is in an upright or inclined state, the bottom plate 12 is substantially in a horizontal or inclined state, and the vertical plate 11 is perpendicular to the bottom plate 12.

[0040] The length of the soil retaining strip 1 ( Figure 1 the dimension in the left-right direction in Figure 1The dimension in the front-to-back direction) can be 10cm-20cm, and the height of the soil stop strip 1 ( Figure 1 The dimension in the upper and lower directions is 10cm-20cm, and the material of the soil stop strip 1 can be plastic, such as polyethylene, polypropylene or polyvinyl chloride.

[0041] The lower surface of the bottom plate 12 and the upper surface of the anti-permeability membrane 2 can be connected by existing hot-melt welding or bonding. The upper surface of the anti-permeability membrane 2 can be drawn with an installation position block for installing the soil stop strip 1, or the upper surface of the anti-permeability membrane 2 can be drawn with an installation position table for installing the soil stop strip 1. The hot-melt welding is a prior art, which is to heat the mating surfaces of two plastic parts tightly against a heating tool. smooth The end faces are heated until they melt. After removing the heating tool, the two molten end faces are pressed together and maintained under pressure until the joint cools down, so that the two plastic parts are connected as a whole.

[0042] The projection of the vertical plate 11 on the anti-permeability membrane 2 can be in a straight line shape. In order to obtain a better effect of preventing soil erosion, the projection of the vertical plate 11 on the anti-permeability membrane 2 can also be in a concave shape, a wavy line shape or a V shape. When the projection of the vertical plate 11 on the anti-permeability membrane 2 is in a concave shape, such as Figure 1 As shown in FIG. 1 , the middle portion of the vertical plate 11 extends in the left-right direction, and the concave opening faces forward. When the projection of the vertical plate 11 on the anti-permeation membrane body 2 is V-shaped, as shown in FIG. Figure 5 As shown, the opening of the V-shape faces forward.

[0043] like Figure 3 As shown, in order to extend the service life of the soil stop strip 1, external reinforcing ribs 13 are provided in front and rear of the vertical plate 11. The external reinforcing ribs 13 extend in the front-to-back direction and are connected to both the vertical plate 11 and the bottom plate 12. Figure 4 As shown, in order to save costs, the soil stop strip 1 can adopt a hollow structure, an inner cavity 14 is provided in the soil stop strip 1, the inner cavity 14 is provided with an inner reinforcing rib plate 15, the inner reinforcing rib plate 15 is connected to both the vertical plate 11 and the bottom plate 12, and the inner reinforcing rib plate 15 extends in the front-to-back direction.

[0044] A soil stop strip row 3 includes multiple soil stop strips 1 evenly spaced in the left-right direction, and the distance between two adjacent soil stop strips 1 in a soil stop strip row 3 can be 1m-1.5m. Multiple soil stop strip rows 3 are evenly spaced in the front-back direction, and the distance between two adjacent soil stop strip rows 3 can be 1m-1.5m.

[0045] like Figure 6As shown, one soil stop strip row 4 comprises a plurality of soil stop strips 1 evenly spaced in the front-rear direction, and the plurality of soil stop strip rows 4 are evenly arranged in the left-right direction. In the left-right direction, the overlapping distance L1 between two adjacent soil stop strip rows 4 may be 1m-1.5m.

[0046] like Figure 7 As shown, the anti-permeability membrane body 2 needs to be conveniently and stably connected to the soil stop strip 1, the anti-permeability membrane body 2 also needs to have a good waterproof effect, and the anti-permeability membrane body 2 also needs to have good puncture and impact resistance (to avoid being stepped on or pierced by stones during installation). The anti-permeability membrane body 2 contains a plastic connecting layer 21, a waterproof material layer 22 and a foaming material layer 23 connected in sequence from top to bottom.

[0047] The plastic connection layer 21 can be made of existing plastics such as polyethylene, polypropylene or polyvinyl chloride, the waterproof material layer 22 can be made of existing materials such as polyethylene, rubber or asphalt, and the foaming material layer 23 can be made of polyethylene foam material or polyurethane foam material. The thickness of the plastic connection layer 21, the waterproof material layer 22 and the foaming material layer 23 can be obtained based on a limited number of experiments.

[0048] The following is an introduction to a landfill closure covering structure, wherein the top of the landfill closure covering structure has a slope, that is, the landfill closure covering structure is roughly conical, and the landfill closure covering structure covers a garbage pile 5. The top of the landfill closure covering structure comprises an exhaust layer 6, an impermeable layer 7, a drainage layer 8, and a vegetation planting soil layer 9 stacked in sequence from bottom to top, and the impermeable layer 7 is the above-mentioned impermeable membrane that can prevent the top soil of the landfill from being lost. The front of the soil stop strip 1 faces the top of the landfill closure covering structure, as shown in FIG. Figure 8 shown.

[0049] The following describes the use of a landfill closure cover structure.

[0050] According to the construction of a reduced-scale model of the landfill closure covering structure, preferably, the projection of the vertical plate 11 on the anti-permeability membrane body 2 is a concave shape, the opening of the concave shape faces forward, and the opening of the concave shape faces the top of the closure covering structure. Alternatively, the projection of the vertical plate 11 on the anti-permeability membrane body 2 is a V-shape, the opening of the V-shape faces forward, and the opening of the V-shape faces the top of the closure covering structure.

[0051] like Figures 9 and 10As shown, multiple soil stop strips 1 are arranged in regular rows and columns, and each soil stop strip 1 divides the front of it into multiple small retaining areas 10 (including part of the drainage layer 8 and part of the vegetation planting soil layer 9). According to the evaluation of foundation stability in the "Code for Design of Building Foundations" GB50007-2011: stability coefficient = anti-sliding moment ÷ sliding moment. Each soil stop strip 1 has a restraining effect on the soil within a limited range, increasing the anti-sliding moment and improving the stability coefficient of the soil.

[0052] In addition, if Figure 11 to Figure 12 As shown, the soil stop strip 1 can not only prevent the soil from sliding down, but also can prevent water flow, that is, each soil stop strip 1 has the effect of extending the water flow path and reducing the hydraulic gradient. Reducing the hydraulic gradient reduces the scouring effect of rainwater on the soil, thereby reducing the risk of soil erosion, maintaining the integrity of the vegetation planting soil layer, protecting the anti-seepage membrane, and extending the service life of the field cover structure. In addition, the integrity of the vegetation planting soil layer is guaranteed, the land can be reused for a second time, and other measures with economic and environmental benefits can be implemented on the vegetation planting soil layer.

[0053] The above is only a specific embodiment of the utility model, and it cannot be used to limit the scope of the utility model. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the utility model should still fall within the scope of the utility model. In addition, the technical features of the utility model can be freely combined with each other, with technical features and technical solutions, with technical solutions and with embodiments.

Claims

1. An anti-seepage membrane capable of preventing the loss of top soil in a landfill, characterized in that: The anti-seepage membrane capable of preventing the loss of top soil of a landfill comprises a soil stop strip (1) and an anti-seepage membrane body (2) connected up and down, the soil stop strip (1) extending in the left-right direction, a plurality of soil stop strips (1) being arranged in regular rows and columns, and a set spacing being present between two adjacent soil stop strips (1).

2. The anti-seepage membrane capable of preventing the loss of top soil in a landfill according to claim 1, characterized in that: The cross section of the soil stop strip (1) is an inverted T-shaped structure, and the soil stop strip (1) comprises a vertical plate (11) and a bottom plate (12) connected up and down.

3. The anti-seepage membrane capable of preventing the loss of top soil in a landfill according to claim 2, characterized in that: The length of the soil stop strip (1) is 20cm-50cm, the width of the soil stop strip (1) is 10cm-20cm, and the height of the soil stop strip (1) is 10cm-20cm.

4. The anti-seepage membrane capable of preventing the loss of top soil in a landfill according to claim 2, characterized in that: The lower surface of the bottom plate (12) is hot-melt welded or bonded to the upper surface of the anti-permeability membrane (2), and the projection of the vertical plate (11) on the anti-permeability membrane (2) is in a straight line shape, a concave shape, a wavy line shape or a V shape.

5. The anti-seepage membrane capable of preventing the loss of top soil in a landfill according to claim 2, characterized in that: External reinforcing ribs (13) are provided in front and rear of the vertical plate (11); the external reinforcing ribs (13) extend in the front-rear direction; and the external reinforcing ribs (13) are connected to both the vertical plate (11) and the bottom plate (12).

6. The anti-seepage membrane capable of preventing the loss of top soil in a landfill according to claim 2, characterized in that: An inner cavity (14) is provided in the soil stop strip (1), and an inner reinforcing rib plate (15) is provided in the inner cavity (14). The inner reinforcing rib plate (15) extends in the front-rear direction.

7. The anti-seepage membrane capable of preventing the loss of top soil in a landfill according to claim 1, characterized in that: A soil stop strip row (3) comprises a plurality of soil stop strips (1) arranged at intervals in the left-right direction, the distance between two adjacent soil stop strips (1) on the left and right is 1m-1.5m, and the distance between two adjacent soil stop strip rows (3) on the front and back is 1m-1.5m.

8. The anti-seepage membrane capable of preventing the loss of top soil in a landfill according to claim 1, characterized in that: A soil stop strip row (4) comprises a plurality of soil stop strips (1) arranged at intervals in the front-rear direction. In the left-right direction, the overlapping distance between two adjacent soil stop strip rows (4) is 1m-1.5m.

9. The anti-seepage membrane capable of preventing the loss of top soil in a landfill according to claim 1, characterized in that: The anti-permeability membrane body (2) comprises a plastic connecting layer (21), a waterproof material layer (22) and a foaming material layer (23) which are sequentially connected from top to bottom.

10. A landfill cover structure, characterized in that: The top of the landfill closure covering structure contains a slope, and the top of the landfill closure covering structure includes a ventilation layer (6), an impermeable layer (7), a drainage layer (8) and a vegetation planting soil layer (9) stacked in sequence from bottom to top, the impermeable layer (7) is the impermeable membrane capable of preventing the loss of soil on the top of the landfill as described in claim 1, and the front of the soil stop strip (1) faces the top of the landfill closure covering structure.

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