One-way water-permeable composite geomembrane

Abstract

The invention belongs to a device which is installed on a seepage control canal and is used for preventing the canal from uplift damage and in particular relates to a one-way water-permeable composite geomembrane. The geomembrane is characterized in that the peripheries of an upper long-fiber needle-punched nonwoven layer, a middle PE (polyethylene) geomembrane layer provided with uniformly distributed through holes and a lower long-fiber needle-punched nonwoven layer are sealed and solidified as a whole; a closed cavity is formed inside the whole; upper net racks and a high-density PE membrane which are adaptive to the area of a gap cavity between the upper long-fiber needle-punched nonwoven layer and the middle PE geomembrane layer are stacked in the gap cavity from top to bottom in sequence; and lower net racks which are adaptive to the area of a gap cavity between the middle PE geomembrane layer and the lower long-fiber needle-punched nonwoven layer are arranged in the gap cavity. The geomembrane has reasonable structure, reliable property, low manufacturing cost and long service life, can effectively lower the water level outside the canal, prevent the seepage control structure of the canal from uplift damage and ensure water delivery safety of the canal and is convenient to install.

Description

technical field [0001] The invention belongs to a safety device for a channel installed on an anti-seepage channel to prevent floatover damage, in particular to a one-way permeable composite geotechnical diaphragm. Background technique [0002] At present, with the development of the national economy, all walks of life have put forward higher standards for the demand and rational allocation of water resources, and long-distance large-flow water delivery has become an inevitable choice for the rational allocation of water resources. For example, the east and middle routes of the South-to-North Water Diversion project being implemented in my country, the construction of Yin'ejike and Desert Canals in Xinjiang, and the South Bank Main Canal Project, etc., all of which have water delivery distances of more than 100 kilometers. Due to the long distance of water delivery, the engineering geological conditions along the way are very different, engineering safety and water delivery ...

AI Technical Summary

Problems solved by technology

When there is a difference in the water level inside and outside the canal, and when the groundwater outside the canal is higher than the water level inside the canal, the groundwater often causes damage to the anti-seepage structure of the canal. (Float-over damage) Such engineering problems often occur in existing canal projects, and there is no such problem at present. ideal solution

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