What Specifications of Geomembrane Are Used in The Anti-seepage Layer of The Landfill
The geomembrane used in the anti-seepage system project of the landfill should meet the standards of the Ministry of Urban Construction GJ / T234-2006 high-density polyethylene geomembrane and high quality aquaculture geomembrane GB / T17643-2011 of the landfill plant, and should also meet the following requirements: The thickness is not less than 1.5mm, and the width is not less than 6m.
Landfill closure works are carried out through the closure of the landfill, the final coverage of the HDPE film, the collection, and discharge of rainwater, the collection and treatment of the landfill leachate, and the reduction of the polluted environment of the landfill. Eliminate the runoff of rainwater, and the flow of the cover layer and surrounding mountains into the field to reduce the landfill leachate due to rainwater leakage.
If temporarily covered, the geomembrane is usually made of 1.0mm geomembrane or 0.75mm geomembrane. This kind of membrane is also called rainwater and sewage diversion high quality environmental geomembrane of landfill. It is made according to regional requirements. Before laying the garbage cover film, the area to be laid should be flattened and compacted, and the flatness of the soil should exceed 30 cm to eliminate sharp objects and stones to avoid damage to the geomembrane and affect the overall anti-seepage effect. Construction requires professionals Of the construction personnel to perform welding, and the welding surface of the air duct requires a welding gun (monorail welding machine) for standard welding.
The composite geomembrane is made of HDPET geomembrane and needle-punched geotextile hot-melt. The key to the waterproof layer is the waterproof property of the geomembrane. It cuts off the permeable channel at the bottom of the canal and has greater tensile strength and fracture strength to withstand water. The geotextile is a polymer material of polyester staple fiber. It is molded according to thermal bonding. It has high tensile strength and ductility. When it is mixed with a high quality textured geomembrane, it not only improves the resistance of geomembrane Tensile strength and puncture resistance, and because the surface of the geotextile is not smooth, increases the frictional resistance of the surface, which is beneficial to the stability of the thickness of the composite geomembrane and protective layer.
Before the composite geomembrane is paved, the base surface to be removed will damage the rib-shaped agglomeration of the composite geomembrane, make the pit flat, solve the slope according to the regulations, and complete the method of earthwork backfill and slope finishing, the flatness and compactness of the slope The degree must exceed the scope of the design concept in order to lay the composite geomembrane.