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Products Description
Needle-punched non-woven Geotextiles are made from polypropylene fibres that are tangled together by a needle-punching process. The fibres may be made in continuous or short lengths (the short length fibres are called staple fibres) and achieve their strength by interlocking. Needle-punched non-woven Geotextiles have excellent water flow rates and are used for filtration of soil fines for drainage applications including trench drains, as a wrapping for perforated pipe, for erosion protection, and combined with three-dimensional structures to create prefabricated drains. They are also commonly used with geomembranes to provide a protective cushion. Needle-punched non-woven primary functions: filtration; separation; protection; drainage. Secondary functions: reinforcement.
Geotextile Functions
- Separation function: Separation of two layers of soil with different soil physical properties, such as road gravel from soft sub-base materials.
- Filtration function: Retaining fine particles when water passes from a fine-grained to a coarse grained layer, such as when water flows from a sandy soil into a Geotextile wrapped gravel drain.
- Drainage function: To drain liquid or gas in the plane of the fabric which results in draining or venting of the soil, such as a gas vent layer in a landfill cap.
- Reinforcement function: Improving the load bearing capacity of a soil structure, such as a high strength Geotextiles to reinforce a retaining wall.
- Protection function: Mechanical protection of geomembranes against perforation and abrasion, such as a liner protective layer when only gravel fills are available.
Application Range
Widely used in highway, railway, dam, coastal shoal engineering reinforcement, inverted filter, isolation and drainage.
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