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The key to ensure the anti-seepage of composite geomembrane lies in the integrity and tightness of the placed materials. When constructing composite geomembrane, you need to smooth the surface of the base layer excellently. After the welding construction is completed, the construction quality inspection will be strengthened, and the damage will be repaired in time.

According to the experience and lessons of the relevant engineering projects, in the real anti-seepage process, the peripheral access of the composite geomembrane usually becomes the most vulnerable or the weakest point where problems occur.

​High-density polyethylene geomembrane (HDPE geomembrane) laying construction steps. Chinese name High-density polyethylene geomembrane lap process. Flatness ±2cm/m2, smooth and straight. Compaction degree 95%. Climate requirement 5-40℃ Cleanliness. No tree roots within the vertical depth of 2.50cm.

In many reservoirs, composite geomembrane uses plastic (thermoplastic polymer), rubber (thermosetting polymer) and composite geotechnical mechanics, but currently my country still widely uses geotechnical mechanics and composite geotechnical mechanics.

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 construction quality control of composite geomembrane includes the quality control of raw materials and the quality control of the construction process.