Upper protective layer structure of impervious barrier structure of municipal solid waste landfill

Abstract

An upper protective layer structure of an impervious barrier structure of a municipal solid waste landfill is a protective layer structure for projecting an uppermost geotextile layer and geomembrane of the impervious barrier structure at the no-landfill-waste position during design of the upper leachate guide layer of the impervious barrier structure for a pebble bed landfill. The upper protective layer structure of the impervious barrier structure of the municipal solid waste landfill comprises a reservoir side wall slope. An impervious barrier lower structure, an impervious HDPE (high-density polyethylene) film and geotextile are sequentially arranged on the surface of the reservoir side wall slope from top to bottom. A wheat straw mud layer or rice straw mud layer is arranged on the geotextile. Geogrid is arranged in the middle of the wheat straw mud layer or rice straw mud layer in the area with gradient larger than 1:1. The wheat straw mud or rice straw mud firmly and durably protects the upper geotextile and the geomembrane of the impervious barrier structure. The upper protective layer structure has the advantages that structure is simple, construction is safe and convenient, materials are taken locally, quality is reliable, and protection of the geotextile and the geomembrane on the structure surface is evidently effective. Ageing and cracking of the geotextile and the geomembrane on the surface of the impervious barrier structure due to long-term rain and insolation are prevented, and impermeability of the impervious barrier structure is ensured.

Description

technical field [0001] The invention belongs to the technical field of domestic waste treatment, and in particular relates to an upper protective layer structure of an anti-seepage layer structure of a domestic waste landfill. Background technique [0002] The function of the anti-seepage structure of the domestic waste landfill is to completely isolate the landfill from the surrounding strata through the anti-seepage layer, forming an independent and closed environment of the landfill, thereby preventing the landfill leachate from seeping into the ground and affecting the environment around the landfill. groundwater pollution. The stability, durability and effectiveness of the anti-seepage layer structure of the landfill site is the guarantee for its function. The protection of the anti-seepage layer structure after laying is a very important engineering measure in the operation process of the domestic waste landfill site. [0003] In the structural design of the anti-seep...

AI Technical Summary

Problems solved by technology

During the operation process after the completion of the construction of the domestic waste landfill, as mentioned above, the uppermost geotextile and geomembrane of the anti-seepage layer structure of the upper part of the landfill where the domestic waste has not been filled to a height must be exposed to wind and rain. , Exposure to the sun for several years, or even more than ten years, the anti-seepage membrane in the anti-seepage layer structure, especially the geotextile on the surface of the anti-seepage layer structure will age or even rupture under the condition of rain and sun for many years , which seriously affects the anti-seepage performance of the anti-seepage layer structure, resulting in the reduction or disappearance of the anti-seepage function of the anti-seepage layer structure. vital technology

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