Geotextile has many functions, such as anti-seepage, filtration, drainage, isolation, reinforcement, protection and sealing. Compared with conventional masonry and concrete materials, it has the advantages of low investment, simple construction technology, short construction period, good anti-seepage effect and high effective utilization coefficient of channels. The American Association of Agricultural Engineers defines geotextiles as geotextiles or geosynthetics that exist between soil and pipelines, stone cages, or retaining walls to enhance water movement and hinder soil movement. Geotextiles in ASTM 4439 are defined as textiles made of a pure pervious geosynthetics. It is used in soil, rock, clay or other geotechnical engineering related materials and plays a structural role as part of a human-made project. The raw materials used in geotextiles should not only consider the physical and chemical properties required in the use environment, but also pay attention to the cost of products.
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