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There are two ways to lay composite geomembrane on the upstream dam surface of the earth dam. The other is laying perpendicular to the dam axis (horizontal laying). There are 7 anti-slip tooth grooves on the upstream slope, and the tooth groove spacing is 5-10m. The bottom of the tooth groove is 1m wide and 0.8m deep. This project adopts the horizontal laying method, and the composite geomembrane must be folded 50cm and stretched at the upper end of the grazing.

The purpose of geomembrane is to use its anti-permeability effect. Geomembrane should be impermeable to the molecular structure and manufacturing process. However, due to the unevenness and defects in manufacturing, the commonly used geomembrane must not leak. It's just that it is relatively difficult to permeate and what is more important is whether the geomembrane can maintain its anti-seepage performance under the action of long-term water head when it contacts the actual soil (or other materials). Due to the uneven contact surface, rough soil particles, large local deformation of the soil, etc., the geomembrane may be broken or torn under the action of high water head, and its anti-seepage performance will be lost or weakened. Therefore, corresponding anti-seepage tests are also required.

The geomembrane currently used in our country is mainly high-density polyethylene geomembrane.

The composite anti-seepage geomembrane has a high anti-seepage ratio.

When selecting the anti-seepage geomembrane, we must first establish our ordering purpose, for which place and what function is required for ordering the geomembrane. Knowing this, we can reasonably and effectively reduce the selection category.

The polyethylene geomembrane manufacturer uses a brand-new PE material to make a 6-meter plastic film for use in anti-seepage projects. The thickness of the film is 0.75mm to 2.0mm. Geomembrane is a kind of high molecular polymer material.