CN212001289U

CN212001289U - Side slope seepage-proofing structure of refuse landfill

Info

Publication number: CN212001289U
Application number: CN202020393482.2U
Authority: CN
Inventors: 陈亚细; 陈水和
Original assignee: Fujian Minghong Installation Co ltd
Current assignee: Fujian Minghong Installation Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-11-24
Anticipated expiration: 2030-03-25

Abstract

The utility model discloses a side slope seepage prevention structure of refuse landfill belongs to the seepage prevention structure field, a side slope seepage prevention structure of refuse landfill, include by the supreme side slope basic unit that sets gradually down, the bentonite waterproof blanket of GCL, geomembrane, geogrid, pitch layer, cobble layer, geotechnological cloth layer and geotechnological bag layer, side slope basic unit sets up at compacted side slope body upper surface, and geotechnological bag layer is laid by a plurality of soil bags that fill has the sand on the geotechnological cloth layer and is formed, and the upper surface on geotechnological bag layer has outside convex bulge. The utility model discloses a side slope seepage prevention structure of refuse landfill has good prevention of seepage effect.

Description

Side slope seepage-proofing structure of refuse landfill

Technical Field

The utility model belongs to seepage prevention structure field especially relates to a side slope seepage prevention structure of refuse landfill.

Background

The garbage disposal method can be generally divided into several methods such as sanitary landfill, incineration, composting and the like. The refuse landfill is a refuse centralized stacking site adopting a sanitary landfill mode, and the refuse sanitary landfill is widely applied in China due to low cost and good sanitary degree.

Landfill is the most prominent and effective method for treating municipal waste. However, the long-term stacking and storage of the garbage and the waste can generate leachate and derived gas, so that the surrounding environment is polluted, according to relevant specifications of China, a layer of seepage-proofing structure needs to be arranged at the bottom of the landfill site, the existing seepage-proofing structure has poor seepage-proofing effect, and the seepage-proofing effect is easily influenced by external damage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a side slope seepage prevention structure of refuse landfill has good prevention of seepage effect.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a pair of side slope seepage prevention structure of landfill, include by lower supreme side slope basic unit, GCL bentonite waterproof blanket, geomembrane, geogrid, pitch layer, cobblestone layer, geotechnological cloth layer and the geotechnological bag layer that sets gradually, side slope basic unit sets up at compacted side slope body upper surface, and the geotechnological bag layer is laid by a plurality of geotechnological bags that fill with sand on the geotechnological cloth layer and is formed, and the upper surface on geotechnological bag layer has outside convex bulge.

Preferably, the anti-stripping strength of the GCL swelling waterproof blanket is more than or equal to 7N/cm.

Preferably, the tensile strength of the GCL swelling waterproof blanket is more than or equal to 85N/cm.

Preferably, the permeability coefficient of the GCL swelling waterproof blanket is less than 4.8 multiplied by 10^-11cm/s。

Preferably, the type of geogrid is a glass fiber geogrid.

Preferably, the geotextile layer is composed of one or more of polypropylene staple fiber geotextile, polyester filament geotextile and polyester staple fiber geotextile.

Preferably, the cross-sectional shape of the protrusion is one of arc, trapezoid, rectangle, and concave.

The utility model has the advantages that:

1. through the superposition and mutual matching of the structures of all the layers, the anti-seepage effect is good.

2. Has good protection effect and prevents the seepage-proofing effect from being influenced by external damage.

3. The setting of bulge not only has good wholeness and topography adaptability, improves the degree of discerning.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The labels in the figures are: 1-side slope base layer, 2-GCL swelling waterproof blanket, 3-geomembrane, 4-geogrid, 5-asphalt layer, 6-cobble layer, 7-geotextile layer, 8-geotextile bag layer, 81-bulge and 9-side slope body.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Those not described in detail in this specification are within the skill of the art. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, the slope seepage-proofing structure of a refuse landfill provided in this embodiment includes a slope base layer 1, a GCL bentonite waterproof blanket 2, a geomembrane 3, a geogrid 4, an asphalt layer 5, a cobble layer 6, a geotextile layer 7, and a geotextile bag layer 8, which are sequentially arranged from bottom to top, the slope base layer 1 is arranged on the upper surface of a compacted slope body 9, the geotextile bag layer 8 is formed by laying a plurality of geotextile bags filled with sand on the geotextile layer 7, and the upper surface of the geotextile bag layer 8 has a protrusion 81 protruding outward. The GCL bentonite waterproof blanket 2 is characterized in that high-expansibility sodium bentonite is filled between special composite geotextile and non-woven fabric, a plurality of small fiber spaces can be formed by a bentonite anti-seepage pad manufactured by a needle punching method, so that bentonite particles can not flow in one direction, and a uniform high-density colloidal waterproof layer is formed in the pad when meeting water, thereby effectively preventing water leakage. The geogrid 4 is a glass fiber geogrid, has high tensile strength, low elongation, high thermal stability and compatibility of mixing with asphalt, can be better combined with the asphalt layer 5, improves the stability, further improves the anti-seepage performance due to the arrangement of the asphalt layer 5, has good anti-puncture capability, avoids each layer below the asphalt layer 5 from being damaged by external force, and ensures the anti-seepage effect. The cobble layer 6 has good flow guiding effect. Through the setting of cobble layer 6, geotechnological cloth layer 7 and geotechnological bag layer 8 for external destructive power is difficult to reach pitch layer 5, further improves the protectiveness. The utility model discloses a coincide and mutually support of each layer structure have good prevention of seepage effect to have good guard action to the substructure, avoid receiving external destruction and influence prevention of seepage effect.

Furthermore, the anti-stripping strength of the GCL swelling waterproof blanket 2 is more than or equal to 7N/cm, the tensile strength of the GCL swelling waterproof blanket 2 is more than or equal to 85N/cm, and the permeability coefficient of the GCL swelling waterproof blanket 2 is less than 4.8 multiplied by 10^-11cm/s, good anti-seepage performance and difficult damage.

Further, the geotextile layer 7 is composed of one or more of polypropylene staple fiber geotextile, polyester filament geotextile and polyester staple fiber geotextile.

Further, the cross-sectional shape of the protrusion 81 is one of an arc shape, a trapezoid shape, a rectangular shape and a concave shape, and is specifically selected according to different use situations. The arrangement of the protruding portion 81 not only has good integrity and terrain adaptability, but also is more attractive, and the identification degree is improved.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a side slope seepage prevention structure of landfill which characterized in that:

the slope foundation comprises a slope foundation layer, a GCL swelling waterproof blanket, a geomembrane, a geogrid, an asphalt layer, a cobblestone layer, a geotextile layer and a geotextile bag layer which are sequentially arranged from bottom to top;

the side slope base layer is arranged on the upper surface of the compacted side slope body;

the geotextile bag layer is formed by paving a plurality of geotextile bags filled with sandy soil on the geotextile layer, and the upper surface of the geotextile bag layer is provided with a convex part which protrudes outwards.

2. The landfill slope seepage prevention structure of claim 1, wherein:

the anti-stripping strength of the GCL swelling waterproof blanket is more than or equal to 7N/cm.

3. The landfill slope seepage prevention structure of claim 1, wherein:

the tensile strength of the GCL swelling waterproof blanket is more than or equal to 85N/cm.

4. The landfill slope seepage prevention structure of claim 1, wherein:

the permeability coefficient of the GCL swelling waterproof blanket is less than 4.8 multiplied by 10^-11cm/s。

5. The landfill slope seepage prevention structure of claim 1, wherein:

the type of the geogrid is a glass fiber geogrid.

6. The landfill slope seepage prevention structure of claim 1, wherein:

the geotextile layer is composed of one or more of polypropylene staple fiber geotextile, polyester filament geotextile and polyester staple fiber geotextile.

7. The landfill slope seepage prevention structure of claim 1, wherein:

the cross-sectional shape of the convex part is one of arc, trapezoid, rectangle and concave.