Geomembrane is a new kind of geomembrane, which is composed of plastic film and non-woven fabric. Its anti-seepage performance mainly depends on the anti-seepage performance of plastic film. At home and abroad, the plastic films used for seepage prevention mainly include polyvinyl chloride (PVC), polyethylene (PE), EVA (ethylene / vinyl acetate copolymer). In tunnel application, there are also those designed to use ECB (ethylene vinyl acetate modified asphalt blend geomembrane). They are polymer chemical flexible materials with small specific gravity, strong extensibility, high adaptability to deformation, corrosion resistance and low temperature resistance It has good frost resistance.
Short fiber needle punched nonwoven geotextile
Short fiber needle punched nonwoven geotextile is one of nonwovens and industrial fabrics. It is made of crimped polyester staple fiber with fiber size of 6-12 denier and length of 54-64mm.
Bentonite waterproof blanket
Geosynthetics clay liner (GCL) is a new type of environmental protection composite waterproof and anti-seepage material, and it is also a kind of waterproof material based on the swelling principle of bentonite in water. It is composed of bentonite particles filled between the woven geotextile and the non-woven geotextile, and the upper non-woven fiber is combined on the lower woven fabric through bentonite particles, special process and equipment, and needling method.
Three dimensional composite drainage network
The three-dimensional geo composite drainage network is made of high-density polyethylene (HDPE). The ribs are extruded through a special die. The three ribs are arranged according to a certain distance and angle to form a three-dimensional spatial structure with drainage guide channel. The middle rib has greater rigidity, forming a rectangular drainage channel. The results show that the three-layer ribs of the drainage network have high longitudinal and transverse tensile strength and compressive strength; the drainage guide channel formed between the three-layer ribs is not easy to deform under high load, which can prevent the geotextile from embedding into the core of the geonet and ensure smooth drainage. The three-dimensional geotechnical drainage network has high strength and high drainage type according to the use.
Composite anti-drainage board
Composite drainage board (also known as 3D composite drainage network, drainage grid) is a new type of drainage geotechnical material. It is made of high-density polyethylene (HDPE) and processed by a special extrusion process, with a three-layer special structure.
HDPE geomembrane impermeable membrane
HDPE geomembrane is one of the geosynthetic materials, the application of geosynthetic materials originated in the 1950s, the domestic geomembrane is one of the country's eight five-year plan. HDPE geomembrane is a waterproof and barrier type material produced from (medium) high density polyethylene resin (density of 0.94g/cm3 or more geomembrane). HDPE geomembranes are known as "high density polyethylene films" and have excellent resistance to environmental stress cracking, low temperature, ageing and corrosion resistance, as well as a wide temperature range (-60 to +60) and a long service life (50 years).