HDPE geomembrane refers to high-density polyethylene film used in civil anti-seepage projects. The thickness of the HDPE geomembrane used in anti-seepage and waterproof projects ranges from 0.5mm to 3.0mm. The thickness can be 0.75mm, 1.0mm, 1.25mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, etc. Use hot-melt welding equipment for joint processing.
The thickness of the anti-seepage geomembrane is generally designed during the engineering design. There are many factors considered in the design: local environment, external factors, water depth, etc. The design thickness of the geomembrane is also related to the material and form of the soil. For example, the larger the diameter and angularity of the soil particles of sandy soil, the greater the thickness required.
The thickness of the geomembrane selected for different application fields is also different. There are many used fields, such as municipal environmental protection field landfills, especially liquid waste, which has fluidity and extravasation, and is easy to spread and difficult to control and handle. Now, geomembrane can be used to solve this problem, usually 1.5mm or 2mm thick geomembrane is used in landfills. Of course, when geomembrane is used in different directions in the landfill, the thickness of the geomembrane is different, as a substrate for anti-seepage, side slope anti-seepage, and closure coverage. The types of films used in different orientations are different, such as smooth surfaces for substrates and rough surfaces for slopes.
Farming field: Geomembranes are used in the field of aquaculture. As water seepage often occurs in diversion ditches, geomembranes can be used now to prevent the extravasation of irrigation water and improve efficiency and longevity. Also, there are aquaculture fish ponds and shrimp ponds. Geomembranes with a thickness of 0.75mm and 1mm are used.
Petrochemical industry: The impermeability, acid resistance, alkali resistance, and chemical resistance of geomembrane make it very popular in the petrochemical industry. It can be used for anti-seepage in chemical sewage plants and oil refining sewage tanks to avoid chemical corrosive liquids and petroleum waste liquids. For diffusion and extravasation, these projects usually use geomembrane with a thickness of 1.5mm, 2mm or 2.5mm.
In addition, in the choice of thickness, there are many other factors, such as landfill topography, soil quality, anti-seepage materials, anti-seepage requirements, and so on. How to choose the thickness of geomembrane in anti-seepage engineering? There is no doubt that the thicker the geomembrane, but at the same time the cost will increase. The thinner the thickness, although the cost can be reduced, it cannot meet the needs of the project.
Therefore, choosing a suitable thickness of geomembrane can not only meet engineering needs, but also achieve the purpose of reducing costs. The thickness should be selected and customized according to the engineering requirements of the geomembrane. The thickness of the geomembrane is usually not less than 0.5mm. In the actual operation of the project, it is recommended to entrust the relevant testing center to test the materials to check whether the quality of the geomembrane produced by the manufacturer is reliable and to provide a basis for selecting safe, reliable, and economical materials. The application environment of geomembrane is buried in the ground all year round, so it is required to have good anti-aging and anti-decomposition ability and can resist the piercing of plant roots. For geomembrane working in complex water environment, it should also have good acid and alkali resistance.