Pig farm cesspool leakproof membrane chemical reaction tank HDPE geomembrane 2.0 national standard geomembrane geomembrane also known as HDPE geomembrane, impermeable geomembrane, PE film, geomembrane is an impermeable material made of HDPE particles, specifications are from 0.2mm to 3.0mm thickness, 1.0 to 3.0mm workshop habit called board, also known as waterproof board, with anti-seepage, isolation, etc. Many The characteristics of. Geomembrane is divided into several standards according to quality, such as enterprise standard, national standard, new material, urban construction, American standard, etc. Due to the excellent anti-seepage performance of geomembrane, HDPE impermeable geomembrane is widely used in landfills, mining ash fields, waste residue treatment plants, reservoirs, municipal administration, highways, fish ponds, biogas digesters, tailings depots, reservoirs, artificial lakes and other environmental protection anti-seepage projects. Classification of geomembrane: 1: GH-1 geomembrane; 2: GH-2S geomembrane; 3: GH-2T1 geomembrane; 4: GH-2T2 geomembrane; 5: GL-1 geomembrane; 6: GL-2 geomembrane. Calculation of geomembrane price: According to the geomembrane thickness of 1.5mm as an example, its weight is 1,425 g/square meter, which can be calculated according to the tonnage price of the finished product. The formula is to multiply the weight per unit area by the price per kilogram to get the price of one square meter. There are differences in the price of polyethylene geomembrane of the same thickness due to different quality requirements and materials used. Common diseases of geomembrane laying quality 1. Geomembrane damage 1 Phenomenon: there are breakings, punctures, abrasions, tears, tears or aging in the geomembrane. 2 Main reasons: (1) The thickness, mechanical index and durability of the geomembrane do not meet the design requirements; the packaging, transportation and storage do not meet the requirements of the specification; the storage period exceeds the expiration date of the product. (2) The surface of the cushion under the geomembrane is uneven; the geomembrane is not laid evenly and the stress is uneven; the top of the geomembrane is damaged by blocks, muck, etc. under or on the membrane. (3) There are sharp debris left on the site, and the geomembrane is in contact with irregular rigid materials. 3 Key points of prevention and control measures: (1) Use qualified geomembrane and pack, transport and store according to specifications. (2) Set a gravel, gravel or sand cushion under the geomembrane. Before laying the cushion, the surface of the base soil is compacted, trimmed smoothly, and removed from debris. (3) Test paving is carried out before geomembrane is laid. Generally, it is carried out from one end to the other. The end is paved first, and the back middle. The end must be carefully laid and anchored, and the elasticity is moderate. (4) Strengthen management, prevent construction damage, and timely backfill protection. 2. The phenomenon of poor quality and water seepage of geomembrane splicing or repair: (1) geomembrane splicing has missed joints or burns; when geomembrane splicing and repairing, quality problems such as excessive tightness, folds, distortions and overlaps occur. (2) Geomembrane repair is not strict, and there are degumming parts. 2 Main reasons: (1) Seams are only visually inspected. (2) Water-soluble glue is used. (3) The uneven base surface under the joint is not treated well; the climate changes abruptly; and the geomembrane margin is insufficient. 3 Key points of prevention and control measures: (1) Conduct on-site inspection of all welds. (2) Use qualified rubber. (3) Treat the foundation before splicing; splice under dry and climatic conditions as much as possible. After splicing, visually inspect for missing joints, folds, and use instruments to inspect; leave enough margin for laying geomembrane. 3. The phenomenon of loosening or sliding of the geomembrane 1: the geomembrane moves, disconnects or sinks at the longitudinal and transverse joints; in the slope area, the geomembrane slides, falls or folds and damages. 2 Main reasons: (1) The vertical and horizontal connection of geomembrane laying is not reliable, and the length is too small. (2) The joints are loose due to uneven and uneven stress at the joints. (3) The upper end is not anchored or the anchoring effect is poor, and sliding occurs under the action of the upper filler and its own gravity. 3 Key points of prevention and control measures: (1) The lap width of the geomembrane should be determined at 0.3m to 0.9m according to the foundation conditions, and stress at the lap should be avoided. (2) If suture is connected, the suture thread and stitch distance shall ensure that the strength of the suture reaches more than 70% of the fabric strength. (3) During construction, the foundation at the joint should be flat and firm and the anchoring effect of the end position should be ensured.