Single-sided high-temperature-resistant impervious three-cloth-two-membrane type composite geo-membrane

Abstract

The invention relates to a single-sided high-temperature-resistant impervious three-cloth-two-membrane type composite geo-membrane. The invention aims to provide the single-sided high-temperature-resistant impervious three-cloth-two-membrane type composite geo-membrane so as to reduce or eliminate damage to an internal structure due to external water temperature, external water pressure, air pressure and the like, and then the construction safety and quality can be ensured. According to the technical scheme of the invention, the single-sided high-temperature-resistant impervious three-cloth-two-membrane type composite geo-membrane is characterized by being composed of two geo-membrane layers, two geotechnical cloth layers and a polytetrafluoroethylene high-temperature cloth layer. The composite geo-membrane has polyester filament geotechnical cloth, a high density polyethylene geo-membrane and the polytetrafluoroethylene high-temperature cloth are sequentially attached to one side of the polyester filament geotechnical cloth, and an ethylene / vinyl acetate copolymer geo-membrane and a polyester staple fiber needle-punched geotextile are sequentially attached to the other side of thepolyester filament geotechnical cloth. The invention is applicable to the single-sided high-temperature-resistant impervious three-cloth-two-membrane type composite geo-membrane.

Description

technical field [0001] The invention relates to a single-sided high-temperature-resistant and anti-penetration three-cloth and two-membrane composite geomembrane. It is suitable for underwater projects such as water conservancy and hydropower projects, river courses, and ports. Background technique [0002] Geomembrane is a geotechnical anti-seepage material composed of 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 in related projects at home and abroad mainly include PE (polyethylene), EVA (ethylene / vinyl acetate copolymer), and ECB (ethylene vinyl acetate modified asphalt blend geomembrane) is also designed for tunnel applications. ), HDPE (High Density Polyethylene Geomembrane), LDPE (Low Density Polyethylene Geomembrane) and LLDPE (Linear Low Density Polyethylene Geomembrane), they are a polymer chemi...

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Problems solved by technology

[0003] However, sometimes high temperature, high head groundwater (such as hot springs) and high pressure geological conditions (such as hot springs) will be encountered. The water temperature and temperature in the excavation holes exceed 110 degrees Celsius, especially in Xinjiang, Tibet and southwest karst areas. The medium in contact with the membrane is susceptible to high temperature, high external water pressure and high air pressure, which will cause the waterproof effect of ordinary geomembranes to fail.

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