Drainage treatment structure for working landfill slope underground water

Abstract

The slope underground water draining structure for landfill includes one bottom underground water draining system below the antiseepage layer, and foundation pits in the landfill slopes causing so-called 'water bag' at different heights and communicated to the bottom underground water draining system. The foundation pits have horizontal holes to inside the slope with drained underground water. The slope underground water draining structure can eliminate so-called 'water bag' effectively to ensure the antiseepage effect of the impervious system in the landfill.

Description

technical field [0001] The invention relates to a drainage structure for groundwater in a landfill site, in particular to a drainage treatment structure for groundwater in the slope of a landfill site that has been in operation. Background technique [0002] At present, hazardous waste (industrial solid waste) and domestic waste landfill sites are generally selected in remote mountainous areas. In order to reduce the amount of landfill work and save investment, most landfill sites use valley sites , built in deep ditches or depressions surrounded by mountains on three sides. These areas are generally densely vegetated, high mountains and steep slopes, and large water catchment areas, so it is easy to cause surface water and seepage water from higher hillsides upstream of the landfill to flow into the landfill. end. In order to control the maximum water level of groundwater to be lower than the anti-seepage layer at the bottom of the landfill, and to ensure that the anti-see...

AI Technical Summary

Problems solved by technology

However, the adaptability to areas rich in groundwater, such as coastal areas, is relatively poor. As a result, after some landfills are completed and put into operation, the groundwater infiltration line of the slope of the landfill will rise and the groundwater will penetrate Some of the mountain soil layer penetrates the anti-seepage clay layer and pours into the landfill under the anti-seepage membrane, causing a layer of water to form between the anti-seepage clay layer and the anti-seepage membrane, which is commonly known as "water bag".

When the water in the "water bag" of this layer continues to increase and cannot be removed in time, it will break the anti-seepage membrane and cause damage to the anti-seepage layer, making the anti-seepage layer unable to achieve the expected effect

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