Geomembrane with double coarse surfaces

Abstract

A geomembrane with double coarse surfaces comprises a geomembrane main body (1), both sides in the vertical direction of the geomembrane main body (1) are provided with lap joint plain edges (3); both sides of the geomembrane main body (1) are coarse surfaces (2) which are of bulged coarse surfaces; the geomembrane main body (1) is 0.8-2.5mm in thickness; the bulges are protruding nails or salient points, and are 0.5-0.6mm in altitude. The surfaces of the geomembrane with double coarse surfaces are coarse surfaces, so that the geomembrane is high in membrane surface friction resistance, excellent in antiskid effect, and high in engineering applicability; both sides in the vertical direction of the geomembrane with double coarse surfaces are provided with the lap joint plain edges, so that two adjacent geomembranes are convenient to lap; the lap joint is reliable, a non-leakage lap joint of two membranes is achieved, the problems of polishing work load required firstly in a lap joint process of membranes with coarse surfaces and the damage of the membranes caused by the polishing treatment are reduced.

Description

technical field [0001] The invention relates to a geomembrane, in particular to a plastic anti-seepage geomembrane for landfills, in particular to a double-rough geomembrane. [0002] Background technique [0003] Geomembrane is a geotechnical anti-seepage material composed of plastic film as the anti-seepage base material and non-woven fabric. Its anti-seepage performance mainly depends on the anti-seepage performance of the plastic film. At present, plastic films for anti-seepage applications at home and abroad mainly include polyvinyl chloride (PVC), polyethylene (PE), EVA (ethylene / vinyl acetate copolymer), and ECB (ethylene vinyl acetate modified film) is also designed for tunnel applications. Asphalt blend geomembrane), they are a polymer chemical flexible material with small specific gravity, strong extensibility, high adaptability to deformation, corrosion resistance, low temperature resistance, and good frost resistance. [0004] Plastic geomembranes are usually u...

AI Technical Summary

Problems solved by technology

The formation of geomembrane rough surface usually has two ways of roughening by spraying and chemical foaming. If the surface of the membrane is roughened by spraying, the spray on the surface of the membrane will fall off in actual use, thereby reducing the anti-skid performance; adding a foaming agent The chemical foaming and roughening of the chemical foaming will reduce the mechanical properties of the membrane due to the addition of foaming agent and foaming. Secondly, the rough surface geomembrane obtained by the above two roughening methods has a limited height of the rough surface, so the coefficient of friction and The anti-slip performance has not increased much, and the anti-slip effect of laying on a slope with a large slope is still limited

[0005]In addition, the existing geomembranes are basically produced by the blown film method. width, resulting in more welding seams during the paving construction process, not only prone to leakage, but also a waste of materials, increasing construction hours and prolonging the construction progress

Secondly, the thickness of the blown geomembrane is uneven, and the thin part is easy to scratch and cause leakage when it encounters hard objects. It is carried out by constant temperature and constant speed. Uneven thickness will affect the quality of lap joint welding and even cause damage.

Furthermore, for the rough film produced by the blown film method, there is no way to reserve smooth overlapping edges on both sides of the film width. In this way, during the construction process, the rough surface of the overlapping edges must first be ground into a smooth surface, and then welded. It not only increases the workload of lap joints, but also easily scratches the surface of the membrane, affects the welding fastness, and is prone to leakage

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