Geotextiles (also called non-woven fabrics) as filter materials are increasingly used in water conservancy projects, especially in dike projects, irrigation projects, and drainage projects.
As a new filter material, geotextile plays an important role in anti-seepage in water conservancy projects. For its application, the choice is directly related to the safety and economy of engineering construction.
Engineering design and construction application of geotextile as filter material should have the three functions of water retention, permeability and anti-blocking, and its strength should meet the requirements. In practice, the following points are open to discussion.
(1) Geotextiles have different types and specifications, and their soil retention, permeability, and anti-blocking properties are different. According to the engineering application conditions, the properties of the protected soil, particle composition and seepage characteristics of the parameters need to be adapted to the geotextile. At present, the specific application and selection of geotextile in engineering mostly deviate from the above conditions.
(2) Geotextiles are subjected to uneven subsidence during use, and are subjected to tension, compression, tearing, and bursting during construction and transportation. Geotextiles are required to have a certain strength to meet the above requirements.
(3) In the current design drawings and instructions, generally only g/m 2 is required, and there is less mention of the more important filter performance and strength indicators.