Abstract: The invention relates to a MSW (municipal solid waste) landfill barrier system capable of prolonging breakthrough time of leachate and a manufacturing method thereof. The system comprises a leachate collection and removal layer, a first HDPE (high-density polyethylene) geomembrane infiltration proof layer (2), a clay liner (5) and a groundwater collection and removal layer (6) which are sequentially stacked from top to bottom. The clay liner (5) is composed of a lower clay liner (51), a middle clay liner (52) and an upper clay liner (53) which are sequentially arranged, wherein the middle clay liner (52) is filled with a medium-fine sand layer (7) laid with sands of particle sizes ranging from 0.1 mm to 0.5 mm and of water content ?3%, wherein the saturated hydraulic conductivity of the medium-fine sand layer (7) varies from 1×10?5 to 1×10?3. A method of manufacturing the MSW landfill barrier system capable of prolonging breakthrough time of leachate is also provided.

Abstract: The invention relates to a MSW landfill barrier system capable of prolonging breakthrough time of leachate and a manufacturing method thereof. The system comprises a leachate collection and removal layer, a first HDPE (high-density polyethylene) geomembrane infiltration proof layer (2), a clay liner (5) and a groundwater collection and removal layer (6) which are sequentially stacked from top to bottom. The clay liner (5) is composed of a lower clay liner (51), a middle clay liner (52) and an upper clay liner (53) which are sequentially arranged, wherein the middle clay liner (52) is filled with a medium-fine sand layer (7) laid with sands of particle sizes ranging from 0.1 mm to 0.5 mm and of water content ?3%, wherein the saturated hydraulic conductivity of the medium-fine sand layer (7) varies from 1×10?5 to 1×10?3. A method of manufacturing the MSW landfill barrier system capable of prolonging breakthrough time of leachate is also provided.