Geomembrane Products: geomembrane Function: seepage, isolation purposes: geotechnical dam, rockfill dam, masonry dam and concrete dam development pressure; embankment, dam levels impervious blanket, ground vertical impermeable layer; tailings dam sewage reservoir dam body and Reservoir; cofferdam; channels, build liquid pool (pit, Khouang); scrapyard; subways, basements and tunnels, tunnel impermeable lining; road, highway, railway roadbed; roadbed and other Salted Prevention Foundation; expansive soil and loess of the waterproof layer; leakproof roofing products: two cloth membrane (impermeable membrane on both sides with the added protection of geotextile) side plus a cloth membrane (impermeable membrane with protective geotextile) Width: 4-6 m Specifications: membrane thickness from 0.2mm - 0.8mm protective layer of geotextile from 100g / m2-800g / m2 (factory production, in line with national standards) Table 1 The basic technical requirements table1 basic technological requirement: Item Indicators tolerance, mass% a unit area, g / m2 by design or contract -102 width, cm by design or contract breaking strength -1.0 3 1), KN / m according to the design or the contract to four vertical and horizontal tear -5% Elongation meet the design requirements of 30 to 100 vertical and horizontal tear strength to 5 1), KN by design or contract -8 aspect to 6 CBR bursting strength, KN by design or contract -57 peel strength 2), N / cm 6 to 8 standard aspect of not less than hydrostatic pressure, Mpa by design or contract is not less than the standard 9 permeability coefficient, cm / s according to the design or contract with the design requirements 1) common staple acupuncture nonwovens / polyethylene geomembrane strength requirements in Table 2. 2) When the sample was measured as unpredictable and less than the predetermined peel off strength of the substrate or membrane rupture, deemed to meet the requirements. Table 2 staple acupuncture non-manufacturing cloth / polyethylene geomembrane strength standards: mass per unit area of ??400 5,006,007,008,009,001,000 Remarks strength requirements \ membrane thickness, mm 0.25 ~ 0.345 0.3 ~ 0.5 breaking strength, KN / m 5 7.5 10.0 12.0 14.0 16.0 18.0 aspect to CBR bursting strength, KN 1.1 1.5 1.9 2.2 2.5 2.8 3.0 CBR bursting strength, KN 1.1 1.5 1.9 2.2 2.5 2.8 3.0 Note: The actual size when the table ranged between adjacent specifications, by linear interpolation to calculate the corresponding evaluation indicators; specifications beyond the scope of the table as well as other processes, the structure of the product, according to the design or assessment indicators negotiated determined by supply and demand sides. Features 1, set seepage, filtration and drainage in one role, along with features such as isolation and reinforced. 2, high composite strength, high peel strength, high puncture strength. 3, drainage capacity, friction coefficient, low coefficient of linear expansion. 4, anti-aging performance, adapt to a wide range of ambient temperatures, stable quality. Applications are widely used in water conservancy, environmental protection, construction, transportation, tunnel and other projects. (2) the characteristics of a low-density polyethylene geomembrane products, anti-aging, long service life. 2, excellent barrier properties, barrier properties, high puncture resistance. 3, good adhesion, easy construction. Range River dams, drainage library impermeable, metallurgical and chemical pollution, construction, subways, cave tunnel, transportation, environmental protection and other engineering applications. (3) linear low density polyethylene geomembrane Features 1, puncture resistance ability. 2, high impact strength. 3, good low temperature resistance. Applications channels, pools, tunnels, chemical industry, construction. (4) EVA geomembrane product features a high strength and toughness. 2, high transparency. 3, to adapt to a wide temperature range. 4, excellent resistance to environmental stress cracking resistance. Applications especially suitable for underground works subways, tunnels and other complex terrain. (5) high-density polyethylene geomembrane product features an excellent resistance to environmental stress cracking resistance. 2, chemical resistance. 3, impermeability capacity, thermal deformation. 4, good anti-penetration. Applications landfill, Sewage treatment plant, tailings storage sites, cave tunnel and underground construction projects. Construction Programs (1) Clean the substrate (2) geomembrane laying (3) joint construction, testing (4) coupled with the surrounding anchor (5) Acceptance (6) a protective layer construction technique, Jumbo geomembrane should be adopted laying machinery operations, small volume geomembrane used in artificial laying. 2, the laying direction geomembrane should meet the design requirements, and the least amount of seams, seam position on large parallel to the direction of tensile stress. 3, laying not too tight, should leave more than enough pieces (approximately 1.5%) in order to adapt to temperature changes and stitching. Should vary with the press shop, at the corner of 2-5 meters film 20-40㎏ put a heavy bag of sand intervals to prevent the wind. 4. Geomembrane connection with the surrounding buildings, the use of bolts and steel batten other components anchored. Around the corner, you should pay attention to proper tailoring geomembrane to ensure proper connection with the surrounding buildings. 5, prior to welding, soldering do sample testing, adjust the welding equipment to the best condition according to the test results. 6, welding, weld quality should always observe. According to the actual construction work, at any time to adjust the welding equipment in top working condition. 7, the junction formed between the geomembrane should be T-shaped, can not make a cross. T-shaped junction of the base material should be used up scars, scar size up to 300 mm × 300 mm can be. Shall be rounded rectangular scar. 8, when there Weld, weld, the weld must be cut using a hot-melt extrusion welder cut parts of welding. Note 1, construction workers must wear rubber-soled shoes without spikes or prohibit any stampede on geomembrane. 2, should be promptly after laying protective layer construction to prevent deformation and thermal shrinkage geomembrane geomembrane aging caused by ultraviolet radiation. 3, prohibiting contact can cause chemical changes in the performance of polyolefin avoid geomembrane permanent deformation. 4, machinery shall not directly rolling geomembrane surface. Design material selection based on engineering properties, categories, site of application, conditions of use, design requirements to select the appropriate type and size. According to the engineering design of water pressure required strength, as well as exposure to bury, climate, life and other application conditions, to determine the thickness of the geomembrane. According to the actual size of the project, area, construction conditions, construction capacity, at least in principle seam construction to determine the width and length of the geomembrane. When the concrete structure at the grassroots level, should choose directly bonded directly on the cement grassroots filament nonwoven composite soil film. Highway seepage treatment is applied, the lower median strip when seepage generally use a cloth membrane 200-300g / m2