Heilongjiang Harbin HDPE geomembrane uses

geomembrane D geomembrane has excellent environmental stress cracking resistance, a large operating temperature range (---+) and a long service life (years)
Scope of use:
, environmental protection and sanitation projects (Such as domestic waste landfills, sewage treatment plants, toxic and harmful substances treatment sites, hazardous materials warehouses, etc.)
, water conservancy and civil engineering (rivers, lakes, reservoirs, dams, anti-seepage, plugging and leakage reinforcement, anti-seepage vertical core wall slope protection for water channels etc.)
, municipal engineering (underground engineering of subway buildings and anti-seepage sewage pipe lining of roof reservoirs, roof gardens, etc.)
, landscaping (artificial lakes, ponds, golf courses, pond bottom lining slope protection, etc.) etc.)
, petrochemical (chemical plant refinery oil storage tank anti-seepage and anti-fouling chemical reaction tank sedimentation tank lining secondary lining)
mining (washing tank, heap leach tank, ash pile Anti-seepage and anti-pollution of mines and tailings dams, etc.)
, Transportation facilities engineering (anti-seepage of highway foundation reinforcement culverts)
, Agriculture (anti-seepage of drinking water ponds and irrigation systems in reservoirs)
br/>, aquaculture industry (lining of fish ponds and shrimp ponds, etc.)
, performance of composite geomembrane
Composite geomembrane (composite anti-seepage membrane) is divided into one cloth and one film and two cloths and one film Width - weight per square meter. The product has high physical and mechanical properties such as tensile strength, tear resistance and bursting. It has the characteristics of high strength, good elongation performance, large deformation modulus, acid and alkali resistance, corrosion resistance, aging resistance and anti-seepage performance. It can meet the needs of civil engineering such as anti-seepage, isolation, reinforcement and anti-crack reinforcement in water conservancy, municipal administration, construction, transportation, subways, tunnels, and engineering construction. Because it uses polymer materials and adds anti-aging agents in the production process, it can be used in unconventional temperature environments. It is often used for anti-seepage treatment of dams and drainage ditches and anti-fouling treatment of waste dumps.
.Construction of composite geomembrane
Composite geomembrane is a composite geomembrane formed by pasting geotextile on one or both sides of the film. Its forms include one cloth and one film, two cloths and one film, two films and one cloth, etc.
Geotextile serves as the protective layer of the geomembrane to protect the anti-seepage layer from damage. In order to reduce ultraviolet radiation and increase anti-aging properties, it is best to use the buried method for laying.
During construction, sand or clay with a smaller diameter must first be used to level the base surface and then the geomembrane can be laid. Do not stretch the geomembrane too tightly. The parts buried in the soil at both ends will be corrugated. Finally, use fine sand or clay to lay a layer of left and right transition layers on the geomembrane. Lay a stone (or concrete prefabricated block) as an anti-collision protective layer. During construction, efforts should be made to avoid stones hitting the geomembrane directly. It is best to construct the protective layer while laying the membrane. The connection between the composite geomembrane and surrounding structures should be anchored using expansion bolts and steel plate battens. The connection parts should be coated with emulsified asphalt (thick) to prevent leakage.
The joint treatment of composite geomembrane is a key process that directly affects the anti-seepage effect. The general seam methods are: ① Overlap: The overlap width should be greater than ② Heat welding: It is suitable for slightly thicker geomembrane substrates. The weld overlap width should not be less than . Poor.)
According to years of practice, it has been proven that the thickness of the geomembrane should not be less than 100%. Too thin may produce pores and be easily damaged during construction, thus reducing the anti-seepage effect. During the construction of geomembrane, special attention should be paid to ensuring that the laying should not be too tight and should not be wrinkled, and the splicing should be firm. It is necessary to carry out construction in strict accordance with technical specifications and ensure five quality checks including preparation, laying, splicing, inspection and backfilling. Due to the good anti-seepage effect of composite geomembrane, this material is widely used in the construction of water-saving renovation and extension supporting projects in Baojixia Irrigation District, and has been widely praised by design and construction units.
Characteristics of composite geomembrane
Composite geomembrane is a geotextile anti-seepage material that uses plastic film as the anti-seepage base material and non-woven fabric. Its anti-seepage performance mainly depends on the anti-seepage performance of the plastic film. . At present, the plastic films used for anti-seepage at home and abroad mainly include polyvinyl chloride and polyethylene. They are polymer chemical flexible materials with small specific gravity, strong extensibility and high adaptability to deformation. Corrosion resistance, low temperature resistance and frost resistance. Its main mechanism is to use the impermeability of the plastic film to block the leakage channel of the earth dam. Its greater tensile strength and elongation can withstand water pressure and adapt to the deformation of the dam body. Non-woven fabric is also a kind of polymer short fiber chemical material. Needle punching or hot bonding has high tensile strength and extensibility. When combined with the plastic film, it not only increases the tensile strength and puncture resistance of the plastic film, but also increases the friction of the contact surface due to the rough surface of the non-woven fabric. The coefficient is beneficial to the stability of the composite geomembrane and protective layer. At the same time, they have good corrosion resistance to bacteria and chemicals and are not afraid of acid, alkali, and salt corrosion.
The service life of the composite geomembrane is mainly determined by whether the plastic film loses its anti-seepage and water-proofing effect. According to the Soviet national standards, the thickness of the polyethylene film with stabilizer for hydraulic engineering is . The service life is up to ~ years. The working life under sewage conditions is ~ years. Therefore, the service life of the composite geomembrane is sufficient to meet the service life of the dam's anti-seepage requirements.
) Selection of composite geomembranes
At present, there are many domestic manufacturers of geomembranes with various product specifications: one cloth, one membrane, one cloth, two membranes, two cloths, one membrane, two cloths, two membranes, multiple cloths and multiple membranes, etc. . Models include /~/, etc. Users can also make requests according to their actual conditions, and the manufacturers can produce them individually according to the requirements.