Waterproof Membrane Do not pull the film too tightly
5 technical requirements for waterproof membrane anti-seepage construction
1. Peripheral interface processing
Around the junction processing requirement is tightly coupled, the waterproof membrane and the surrounding soil plugging waterproof membrane seepage entrance, truncation of lateral seepage path, prevent water penetration into the geomembrane underside, blisters, drop of water in the library is expanding ground membrane. Therefore, the surrounding boundary must pick up the sink and bury the geomembrane into the slot
2. Waterproof membrane laying
When laying a film, it must be laid up and down. The membrane between the membrane and the membrane is pressed flat with the base plane, but it should not be too tight, generally a little loose, but not a bubble at the bottom of the film. Because the geomembrane film is thin and very light, spread good, before the protection layer is not laid, easy to be blown by the wind, so the area of a layer of film is not easy to be too big, the best change is spread film to cover the soil material
According to the manufacturer's information, the waterproof membrane is 1.0-1.9m wide, and the project is 1.9m wide to reduce the connector material. The joint has the method of hot glue, gluing and lap. The design of this project is adhesive and the seam width is 50mm.
If the puncture or tear of the geomembrane is found, it is necessary to use three times the area of the damaged soil film adhesive patch
3. Process flow
The section of the dam waterproof membrane of zhoutou reservoir is used to make the section cycle of digging, side shop, side ramming and side protecting.
4. Protective layer and protective surface
It is necessary to sift through the soil material of 10cm thick layer of geomembrane. It is not allowed to have particle size greater than 6mm, or it can Pierce the waterproof membrane easily. The protective layer of soil material must be compacted with compaction to ensure that the dry bulk density is more than 1.5 and sampling inspection at any time. When backfilling protection layer and masonry surface, be sure to light, so as not to hit the earth work film. In the lower part of the rock protection, 100mm thick gravel or gravel bedding should be covered to prevent the influence of water level change, wind wave and other factors. The dry masonry stone shall be paved with artificial hanging line, the stone shall be firmly embedded, the individual weight of the stone shall be greater than 48kg, and all the gaps shall be filled with small stones