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Landfill impervious system capable of prolonging breakdown time of leachate and manufacturing method thereof
The invention relates to a landfill impervious system capable of prolonging the breakdown time of leachate and a manufacturing method thereof. The system comprises a leachate collecting guide and drainage layer, a first HDPE (high-density polyethylene) geomembrane imperious layer, a clay layer and a groundwater collecting guide and drainage layer which are sequentially arranged from top to bottom in an overlapped mode. The clay layer is composed of a lower clay layer, a middle clay layer and an upper clay layer which are sequentially arranged, wherein the middle clay layer is filled with a medium-fine sand layer which is formed by laying fine sand with a grain size of 0.1-0.5 mm and a water content less than or equal to 3%, and the saturated infiltration coefficient of the medium-fine sand layer is 1*10-5-1*10-3 cm/s. Therefore, the breakdown time of the leachate can be greatly prolonged, and the imperious effects of a landfill impervious layer can be enhanced; meanwhile, the medium-fine sand is low in cost and widespread in china and accordingly easy to obtain. The landfill impervious system capable of prolonging the breakdown time of the leachate is simple in structure and can effectively avoid saturation of the medium-fine sand layer due to infiltration of groundwater and keep the medium-fine sand layer in an unsaturated state all the time.
Landfill impervious system capable of prolonging breakdown time of leachate and manufacturing method thereof
The invention relates to a landfill impervious system capable of prolonging the breakdown time of leachate and a manufacturing method thereof. The system comprises a leachate collecting guide and drainage layer, a first HDPE (high-density polyethylene) geomembrane imperious layer, a clay layer and a groundwater collecting guide and drainage layer which are sequentially arranged from top to bottom in an overlapped mode. The clay layer is composed of a lower clay layer, a middle clay layer and an upper clay layer which are sequentially arranged, wherein the middle clay layer is filled with a medium-fine sand layer which is formed by laying fine sand with a grain size of 0.1-0.5 mm and a water content less than or equal to 3%, and the saturated infiltration coefficient of the medium-fine sand layer is 1*10-5-1*10-3 cm/s. Therefore, the breakdown time of the leachate can be greatly prolonged, and the imperious effects of a landfill impervious layer can be enhanced; meanwhile, the medium-fine sand is low in cost and widespread in china and accordingly easy to obtain. The landfill impervious system capable of prolonging the breakdown time of the leachate is simple in structure and can effectively avoid saturation of the medium-fine sand layer due to infiltration of groundwater and keep the medium-fine sand layer in an unsaturated state all the time.
Landfill impervious system capable of prolonging breakdown time of leachate and manufacturing method thereof
ZHU WEI (author) / SHU SHI (author) / WANG SHENGWEI (author) / XU HAOQING (author) / FAN XIHUI (author) / BAO JIANPING (author) / MIN FANLU (author)
2015-08-26
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
| European Patent Office | 2018
| European Patent Office | 2018
| European Patent Office | 2019
| European Patent Office | 2018