Stereo drainage system structure for landfill underground water

Abstract

The stereo underground water draining system for landfill includes one upper water flow cutting off structure set in the top of the slope in landfill, one bottom water draining structure set in the bottom of landfill, and water cutting off open ditches. The upper water flow cutting off structure includes permeated water cutting off pipes around the landfill; the water cutting off open ditches dug in the periphery of the landfill have outlet in the downstream of the landfill; and the permeated water cutting off pipes are communicated to outside landfill or to the bottom water draining structure. The water draining system may have also middle water flow cutting off structure and foot water flow cutting off structure communicated mutually. The water draining system can drain underground water and surface water effectively to ensure the antiseepage effect of the impervious barrier.

Description

technical field [0001] The invention relates to a drainage system structure for groundwater in a landfill, in particular to a three-dimensional drainage system structure for groundwater in a landfill. Background technique [0002] At present, hazardous waste (industrial solid waste) and municipal solid waste landfill sites are generally located in remote mountainous areas. In order to reduce the amount of landfill work and save investment, most landfill sites use valley sites , built in a deep ditch or depression surrounded by mountains on three sides. These sites generally have dense vegetation, high mountains and steep slopes, and large water catchment areas, so it is easy to cause surface water and seepage water from higher hillsides around the landfill to flow into the bottom of the landfill. Most modern landfills adopt horizontal anti-seepage. In order to control the highest water level of groundwater, make it lower than the anti-seepage layer at the bottom of the lan...

AI Technical Summary

Problems solved by technology

This dredging method is suitable for landfills where the upstream mountains are not high, the water catchment area is small, and the groundwater is not abundant; but for areas with high mountains and steep slopes and rich groundwater, its adaptability is relatively poor, resulting in some landfills After the site is completed and put into operation, the groundwater level at the bottom of the landfill site will rise during the rainy season, especially during heavy rain, which will cause "water pockets" in the anti-seepage membrane.

If it is not controlled, it may even break the anti-seepage membrane, destroy the anti-seepage layer, and cause the anti-seepage layer to lose its anti-seepage effect, which will cause sewage leachate to flow into the groundwater system and pollute the groundwater quality. The consequences are disastrous

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