Landfill reservoir area anti-seepage system capable of protecting geomembrane and construction method thereof

Abstract

The invention relates to the technical field of landfill facilities, and particularly relates to a landfill reservoir area anti-seepage system capable of protecting a geomembrane and a construction method thereof. The landfill reservoir area anti-seepage system comprises a reservoir bottom anti-seepage system and a side slope anti-seepage system; the reservoir bottom anti-seepage system comprises a compacted clay layer, a bentonite waterproof blanket, at least one layer of geomembrane, a rubble layer and a woven geotechnical filter screen which are vertically arranged from bottom to top; the side slope anti-seepage system comprises a compacted clay layer, a bentonite waterproof blanket, at least one layer of geomembrane, a rubble layer and a woven geotechnical filter screen which are obliquely arranged from bottom to top; and geotechnical cloth is laid on the upper layer of the geomembrane, and a high-tensile filter and discharge plate is laid on the upper layer of the geotechnical cloth. The landfill reservoir area anti-seepage system is simple in structure and convenient to construct, compared with a traditional landfill anti-seepage system, resources are saved, the reservoir capacity is increased, meanwhile, the geomembrane in the anti-seepage system can be effectively prevented from being damaged, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of landfill facilities, in particular to an anti-seepage system for a landfill reservoir area capable of protecting a geomembrane and a construction method thereof. Background technique [0002] Landfill technology is an important means for dealing with domestic waste, industrial solid waste (hazardous waste) and fly ash. Landfill is the main facility used in landfill technology; anti-seepage is the main function of landfill , is also the main measure of landfill pollution control. [0003] In landfills, an excellent filtration and drainage system is crucial for the collection and treatment of landfill filtrate. If clogging occurs and drainage is not smooth, leachate will accumulate in the landfill area, causing the landfill to float, greatly shortening the time of filling. The service life of the buried site. Under normal circumstances, the anti-seepage system of the landfill lays pebbles 30-50cm high on ...

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Problems solved by technology

[0003] In landfills, an excellent filtration and drainage system is crucial for the collection and treatment of landfill filtrate. If clogging occurs and drainage is not smooth, leachate will accumulate in the landfill area, causing the landfill to float, greatly shortening the time of filling. Service life of burial

Under normal circumstances, the anti-seepage system of the landfill lays pebbles 30-50cm high on top of the anti-seepage layer as a filter and drainage layer. However, due to the high cost of pebbles, gravel is often used as a drainage layer at present, but this The design method has the following disadvantages: (1) gravel will damage the anti-seepage geomembrane, the anti-seepage system of the landfill must be successful once, and once it leaks later, there is almost no possibility of repair

According to statistics, the laying of gravel on the geomembrane is the biggest cause of geomembrane damage, accounting for more than 70% of the total damage; (2) stones consume a lot of manpower, material and financial resources from transportation to laying, increasing project investment; 3) If pebbles that are relatively difficult to damage the geomembrane are used, the price of pebbles will rise with the increase in demand, and it will be difficult to purchase

(4) Traditional gravel and other natural drainage materials will take up a lot of landfill space; (5) The production process of gravel destroys the mountain and produces a lot of dust and sewage, which is extremely unenvironmental

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