Geotextiles include fabrics for stable formation, water and soil loss fabrics, road fabrics and moisture-proof fabrics.

Woven fabric and nonwovens can be used as geotextiles. The fibers geotextile used in these fabrics are polypropylene, olefin, polyester, nylon and acrylonitrile fiber. In this field, the application of nonwovens exceeds that of woven fabrics. The most important or most widely used fiber geotextile is polypropylene fiber. Polyester fiber has the best performance, but it is considered to be high in cost and can not be used in large quantities; although acrylonitrile has many excellent properties, it is also considered to be more expensive and not suitable for this purpose.

The most commonly used areas of geotextiles are stratum stability, soil erosion prevention and drainage. Geotextiles are equivalent to an isolation layer, forming a stable boundary between different soil layers to maintain the integrity, inherent characteristics and service performance of each layer. Geotextiles belong to this type when constructing dams and placing ballast on roads or railways. These textile materials are equivalent to a barrier that prevents the movement of soil particles, but allows the flow of water to facilitate drainage. Water can be discharged from one soil layer to another through the geotextile layer; or the drainage process can be carried out in a plane or in one layer, when the geotextile acts as a medium for drainage (i.e. filtration). By maintaining uniform stress in a large area, Geotextiles play an important role in enhancing structure and reducing soil loss.
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