reunite with Geomembrane , widely used in canal seepage prevention works. In recent years, geosynthetics have been widely used in civil engineering, especially in flood control and rescue projects, and their achievements have attracted great attention of engineering and technical personnel. For the application technology of geosynthetics, normative technical requirements are proposed from the aspects of seepage prevention, reverse filtration, drainage, reinforcement, protection, etc., which greatly improves the promotion and application of new materials. This material has been widely used in canal seepage prevention works in irrigation areas. Combined with construction practice, the application technology of composite geomembrane is briefly discussed.
performance : Composite geomembrane (composite anti-seepage membrane) is divided into one cloth, one membrane and two cloth, one membrane, wide 4-6m, weight of 200-1500g/m2, high physical and mechanical performance indicators such as bursting, good extensibility, large deformation modulus, good anti-seepage performance, etc. * * *. It can meet the needs of civil engineering such as seepage prevention, isolation, reinforcement, crack prevention and reinforcement in water conservancy, municipal administration, construction, transportation, subway and engineering construction. It is often used for anti-seepage treatment of dams, drainage ditches, and anti pollution treatment of waste yards
Construction matters（ 1) The use must be embedded: the covering thickness should not be less than 30cm.
Composite geomembrane is widely used in reservoir anti-seepage works
（ 2) The renovated anti-seepage system shall be composed of cushion, anti-seepage layer, transition layer and protective layer.
（ 3) The soil mass should be solid and avoid open Uneven settlement, cracks, and turf and tree roots within the anti-seepage range shall be cleaned. Laying of small particle size sand or clay As a protective layer.
（ 4) The geomembrane shall not be pulled too tightly when laying, and the parts buried in the soil at both ends shall be corrugated. When * * * is anchored with rigid materials, a certain amount of expansion shall be reserved.
（ 5) During construction, avoid open stone The heavy objects are directly hit on the geomembrane, and the construction is carried out while laying the membrane and covering the protective layer.
