To say geomembrane pond liner , we must first understand its raw materials, It is a kind of polymer (polyethylene) as the basic material of waterproof isolation type information. Mainly divided into: low density polyethylene (LDPE), high density polyethylene (HDPE) and EVA width, thickness standard is complete. It has the function of resisting environmental stress cracking and chemical corrosion. Chemical corrosion resistance. It has larger operating temperature scale and longer service life. It can be used in waste landfill, feeding, biogas digester, oxidation pond, tailings storage field, way seepage control, embankment seepage control and subway engineering, etc.
Impermeable geomembrane pond liner shop must pay attention to time; If you want to use a longer life, the base must be cleaned up according to the requirements of the planning, which is the key to ensure the anti-seepage effect, especially for the sharp stones, roots and other debris to remove clean, the base surface is not allowed to have part of the concave and convex phenomenon, clean up the base surface to use a tamper hammer or rammer compact, make it dense and flat.
When laying the geomembrane pond liner, it must be laid from top to bottom. Between the geomembrane and hdpe membranes and between the hdpe membrane and the base plane to press flat, but should not pull the geomembrane pond liner too tight, generally slightly loose, but can not leave bubbles at the bottom of the geomembrane. Because the geomembrane pond liner is relatively thin and very light, paved in the future, not paved protective layer once, easy to be blown by the wind, so a geomembrane spread area should not be large, spread geomembrane edge cover protective layer of soil.
By geomembrane pond liner 10cm thick protective layer of soil material must be screened, not allowed to have more than 6mm particle size, otherwise it is easy to puncture the soil hdpe membrane. The protective layer of soil must be tamped to make sure that the dry bulk density is more than 1.5, and sampling inspection at any time. When backfilling protective layer and masonry block stone protective surface, must be put gently, to avoid hitting the hdpe membrane. Under the stone protective surface, 100mm thick gravel or gravel cushion should be filled to avoid the influence of water level change, waves and other elements and wash soil material protective layer. Dry block stone adopts artificial hanging line paving, stones should be tightly embedded, individual weight of surface block stone should be greater than 48kg, all empty space are filled with small stones.
The requirement of peripheral boundary treatment is to combine the composite geomembrane pond liner with the surrounding soil tightly, seal the seepage inlet, cut off the lateral leakage way, avoid seepage into the geomembrane pond liner bottom surface, form bubbles, and burst the geomembrane when the reservoir water level drops. Therefore, the surrounding boundary must be dug to cut the sink, and the geomembrane buried in the groove.