Composite impervious wall for landfill environment protection in soft soil areas and construction method thereof

Abstract

The invention discloses a composite impervious wall for landfill environment protection in soft soil areas and a construction method thereof. The composite impervious wall comprises flexible core walls which are arranged at one circle of a landfill site, the depth of the flexible core walls meet the requirement that the flexible core walls extend from the ground surface to water-insulation layers,plastic walls are arranged correspondingly on the inner sides and the outer sides of the flexible core walls, the inner sides of the inner plastic wall bodies and the outer sides of the outer plasticwall bodies are correspondingly provided with supporting walls, a transition area is arranged between the supporting walls at the inner sides and the landfill site, and an underground water pumping drainage well is arranged in the transition area. According to the composite impervious wall, according to certain procedures, the supporting walls are constructed, grooves are performed vertically, the flexible core walls are vertically installed, plastic concrete is prepared according to the specific proportion, an underwater pouring mode is adopted to construct plastic wall bodies, by adoption of the technical scheme, on the premise that dams and foundations of the landfill site can be guaranteed, accident liquid seepage of dangerous and waste landfill sites can be effectively isolated, so that soil and underground water can be protected.

Description

technical field [0001] The invention relates to a composite anti-seepage wall used for environmental protection of landfills in soft soil areas and a construction method thereof. Background technique [0002] In the prior art, with the rapid development of social economy, urbanization and industrialization are accelerating, urban garbage and industrial waste are increasing sharply, and petrochemical and mining smelting processes are putting more and more pressure on the environment. In coastal soft soil areas, due to soft soil geological defects, high groundwater level and other factors, hazardous waste landfills built in the operation process, once leaked, will cause great harm to soil and groundwater, so it is necessary to build a vertical anti-seepage wall with HDPE membrane to strengthen the environment. Protect. Continuous vertical grooves in soft soil areas will affect the embankment and soil at the edge of the grooves, resulting in displacement and ground cracking. ...

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Problems solved by technology

[0004] However, the plastic concrete in the above technologies encounters seawater erosion, especially the inorganic salts in seawater, which will affect the effect of bentonite and reduce the strength and anti-seepage performance of plastic concrete.

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