A high-quality and efficient laying method of composite geomembrane applied to water conservancy projects

Abstract

The invention discloses a quality-guaranteed efficient laying method of a composite geomembrane applied to hydraulic engineering. The quality-guaranteed efficient laying method comprises the followingsteps of base layer clearing, geomembrane laying, welding treatment and quality detection. By arranging an outer guide pipe in an underground hole groove, gas in a unit airtight space is pumped by avacuum pumping device to from a certain vacuum degree, gas between the geomembrane and an underground water layer is discharged, and gas expansion destruction is effectively prevented; by arranging laying equipment, the geomembrane is laid by the laying equipment to increasing the laying speed of the geomembrane and lower the working intensity of an operator, meanwhile through the geomembrane laying equipment, three layers of structures of a non-woven layer, a geomembrane layer and a non-woven layer are laid synchronously, the laying speed is increased, and damage caused to the geomembrane inthe repeated laying process is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of geomembrane laying methods, in particular to a quality-guaranteed and efficient laying method of a composite geomembrane applied to water conservancy projects. Background technique [0002] Geosynthetics are widely used in fields such as water conservancy, railways, seaports, highways, urban construction, and ecological environment. Their functions mainly include anti-seepage, reinforcement, filter layer and drainage (air), isolation and protection, etc. [0003] As an anti-seepage geosynthetic material, composite geomembrane is an impermeable geotechnical anti-seepage material composed of plastic film as an anti-seepage base material and non-woven fabric. Because of its good tensile and anti-seepage performance and strong deformation ability, it has been widely used in reservoir areas, dams, cofferdams and other hydraulic structures, as well as garbage disposal sites, etc. anti-seepage works. [0004] ...

AI Technical Summary

Problems solved by technology

[0005] 1. In general, the state between the geomembrane and the groundwater level is unsaturated soil, and the gas will be difficult to discharge freely when it is consolidated under the additional load. When the difference between the accumulated gas pressure and the load on the membrane exceeds the strength of the membrane, it will cause Membrane body inflation damage, severe geomembrane can cause seepage prevention project failure;

[0006] 2. The laying of the existing geomembrane is to wrap the geomembrane on the geomembrane wiring roller, and several operators lift the geomembrane winding roller, and the operators manually lay the geomembrane, which not only wastes a lot human and material resources, and the laying efficiency is low, and the laying intensity is high;

[0007] 3. Existing water conservancy projects usually require multi-layer laying in the process of laying geomembrane, that is, a three-layer structure of non-woven fabric layer-geomembrane layer-non-woven fabric layer, and the existing laying method is to lay layer by layer, that is, First lay a layer of non-woven fabric as a whole, then lay the geomembrane layer, and finally lay the non-woven fabric layer. layer damage

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