Details of geomembrane: geomembrane applications canal seepage project: In recent years, geosynthetics in civil engineering, especially in a large number of applications and their effectiveness in flood rescue project, causing the majority of engineering and technical personnel attention. Geosynthetics for the application of technology, the country from seepage, filtration, drainage, reinforcement, protection and other aspects of proposed normative technical requirements, greatly accelerated the pace of promotion and application of new materials. The material is widely used in irrigation canal seepage control project, combined with the construction practice, the application of technology of composite geomembrane. 1, geomembrane performance geomembrane (composite impermeable membrane) into a cloth membrane and two cloth one membrane, width 4-6m, weight 200-1500g / square meter, tensile, tear, top physical and mechanical properties, such as breaking high, the product has high strength, good elongation properties, deformation modulus, acid, anti-corrosion, anti-aging, anti-seepage performance characteristics. To meet the water, municipal, construction, transportation, subways, tunnels, construction of impervious, isolation, reinforcement, crack control reinforcement, civil engineering needs. Due to its selection of polymer materials and the production process adds anti-aging agent, it can be used in unconventional temperature environment. Commonly used in dams, drainage ditch seepage treatment, as well as pollution prevention and waste treatment field. 2. Construction of composite geomembrane geotextile composite geomembrane is affixed on one or both sides of the film to form a composite geomembrane. In the form of a cloth membrane, two cloth one film, two films a cloth. Geotextile as geomembrane layer of protection, protective impermeable layer from damage. To reduce the ultraviolet radiation, increases anti-aging properties, preferably laying buried in France. Construction, the first to use a smaller diameter material leveling sand or clay base surface, and then laying the geomembrane. Geomembrane not stretched too tightly, buried in the soil at both ends of the body part is corrugated, and finally in the shop geomembrane layer of about 10cm over layer of fine sand or clay. Lined with 20-30cm stone (or precast concrete blocks) for the anti-scour protection layer. Construction, should try to avoid a direct hit in the geomembrane stones, the best side to side laying the construction of the protective layer. Geomembrane connection with the surrounding structures should be used bolts and steel batten anchoring, joints brushing emulsified asphalt (thickness 2mm) bonding, to prevent leakage there. Geomembrane seams processing is a key process directly affect seepage effect. Generally joints are: ① lap: lap width should be greater than 15cm; ② heat welding: appropriate for thicker substrates geomembrane weld lap width of not less than 5CM (not recommended for bonding, prolonged water immersion. easy to open plastic, impervious poor results.) Based on years of practice has proved that the geomembrane thickness not less than 0.25mm, too thin may have holes, and easily damaged during construction and reduce seepage effect. Geomembrane construction, with particular attention to the laying do not too tight, not wrinkled, stitching firmly. In strict accordance with the technical specifications of construction, the good preparation, laying, splicing, testing and backfilling five quality. Due to impermeable geomembrane good effect, at present, irrigation and water-saving transformation Baojixia Corollary project construction, extensive use of this material, has been widely praised design, construction units. Geomembrane Features: width 6 meters, is currently the most wide-composite film high puncture resistance, friction coefficient good aging resistance, adapt to the environment temperature range excellent resistance to drainage performance suitable for water, chemicals, construction, transportation, subway , tunnels, waste disposal sites and other projects Main Specifications: 400 5,006,007,008,009,001,000 Notes 0.25 to 0.35 from 0.3 to 0.5 breaking strength KN / m 5 75 100 120 140 160 180 CBR bursting strength KN 11 15 19 22 25 28 30 vertical and horizontal tear strength KN 0.15 0.25 0.32 0.40 0.48 0.56 0.62 aspect to