History of geotechnical materials
Geotextiles have the following three series:A needle nonwoven geotextile, the specification of 100g/m2-600g/m2 between any choice, the main raw materials is the use of polyester staple fiber or polypropylene staple fiber, made by acupuncture method, the main purpose is to: slopeprotection River, sea, Lake embankment, land reclamation, flood control engineering, dock lock, is an effective way to maintain and prevent the piping the filter to the soil.Two, non-woven cloth and PE membrane composite geotextiles, specifications have a membrane cloth, a cloth film two, maximum width of 4.2 meters is the main raw material to use acupuncture non-woven polyester staple fiber, PE film by composite, is mainly used for seepage control, railway, highway, tunnel, subway, airport, etc. engineering.Three, non-woven and woven composite geotextiles, non-woven fabric and polypropylene filament woven fabric, non-woven and plastic woven composite, suitable for foundation reinforcement, adjust the permeability coefficient of the basic engineering facilities.
Geosynthetics are widely used in geotechnical engineering at present, which is a general name of polymer products. As early as in 1920s, the chemical industry was successful in the production of synthetic materials, but it was not until the late 50s that the material was gradually used as a new type of building materials to be used in geotechnical engineering. In the early stage, the products were mainly pervious to spinning and non-woven geotextiles, and later produced impermeable geomembrane. With the requirement of engineering practice and the improvement of manufacturing technology, the geogrid and other composite products with high strength reinforcement are manufactured. In this way, the original geotechnical fabric word has not summarized all kinds of products in the international meaning, so there are many alternative names, the geotextile material was the most common, but the habit still referred to as geotextile. Geotechnical material is divided into several categories of materials: geotextile, geomembrane, geogrid, drainage board, composite geomembrane, geotextile, geocell, bentonite waterproof blanket, etc..
