In the 1960s and 1970s, the design of filament geotextile filter geotextile, a group that the decision to be protected several major soil hydraulic properties and fabric. Such as particle size and permeability of soil woven geotextile fabric pore size, permeability, open area, such as c 7L where soil particle size and fabric 7L diameter plays a decisive role. People have made reference to the classical design principles pellets filtration through test analysis and proposed a different design criteria, in accordance with the characteristics of soil particle size aperture choice of fabric. About fabric aperture test method, used for the initial screening method or wet sieving. Since 1977 D. Yang M sieve method proposed water power to create customized e woven geotextile, in recent years has been adopted by many other countries. For fabric aperture design. Since the 1970s, not of the Special woven geotextile, experts consider more factors: such as being protected soil particle size distribution, uneven degree of compactness, teaching, etc.; seepage flow state - laminar or turbulence; seepage direction - one or both directions, with identical or opposite to the direction of gravity; openings of the fabric, the thickness of the structure, and the forces, and the like, made more complex design is pushed, and a long-term laboratory and prototype observation to verify the accuracy of these guidelines. But has yet to agree a recognized pattern. Permeable fabric is also pushing a similar situation. In view of the comments on the design criteria of divergence, thus filament geotextile Some experts suggested by the test to select fabric, namely the use of protected territories and fabric filter simulation tests to determine whether the fabric is able to meet the requirements. According to Dawa and the Hun River embankment slope soil test results, Cheung indoor filtration analysis drawn by A. Curve shown in Figure. According to the different experimental conditions mutated geomembrane Richard critical curve points (destruction) gradient table. From the test results, the selected good anti-clogging performance geotextile woven geotextile practical, especially Dawa soil. Whether in standard or non-standard tests Huai, Dawa soil Cheung cR values ??are less than o. 8, Andrew Dawa standard soil test, Alexandra value even less than o. 5. Substantially equal to o. 44. Only the largest case of non-standard o. 76, but with the increase in head even decreased, indicating the role of head of the higher filtration geomembrane play better. Hun River soil samples were used geomembrane filtration effects, although not as good at Dawa soil samples, but also within the range allowed by the specification (cA'3), is also the head of the higher, the better the filtration effect play. That is woven with a larger pore size is very small, as the likelihood of clogging of the filter layer. As can be seen from the figure the geomembrane, in the case where the hydraulic gradient is less than 73, the permeability coefficient and flow velocity are not mutated, flow rate and water head under various conditions geomembrane substantially maintained a relatively slow proportional growth of eels. Critical protective case (the damage) was significantly higher than those without the protection of slope, in line with the actual project situation. There are two conditions under the protection of r. Point mutations i f curve is greater than 95, the protection of gravel i value greater than 100, which is equivalent to a 95- 100m head in 1M thick filter layer seepage path. Geomembrane revetment works on flood control is almost impossible, in fact, it is sufficient to meet the project by 50 security needs. So geomembrane show by experimental analysis of indoor filtration geotextile om poison 10J9 Soil new guidelines for insurance protection engineering filtration designed with adequate margin of safety. Quality woven geotextile, woven geotextile Tianmen, Edison new materials (View) provided by New Materials Co., Edison. Edison New Materials Co., Ltd. (www.fangshenmo.com) strong, credible, in Dezhou site construction materials industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Edison new materials into the brilliant and you work for a better future!