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一、土工合成材料应用概况在葛洲坝工程中大量使用了土工合成材料作减压排水孔的滤层。葛洲坝水利枢纽坐落在白垩系下统红色碎屑岩上。石门组为砾岩与粉砂岩互层,无粘土类夹层。五龙组的主要岩性是粘土质粉砂岩与砂岩互层,其中夹有44条软弱泥化夹层。这些夹层,从大江、二江到三江一层接一层分布,似叠瓦状缓倾角平行排列。它们性状差,强度低,是该工程的主要工程地质问题。室内外渗透变形试验结果表明,泥化夹层在渗透水作用
First, the geosynthetics application profile In the Gezhouba project extensive use of geosynthetics as a drainage layer filter layer. Gezhouba Dam is located in the Lower Cretaceous red clastic rocks. Shimen group of conglomerate and siltstone interbedded clay-free interlayer. The main lithology of the Wulong Formation is interbedded clay clayey siltstone and sandstone, in which there are 44 weakened muddy intercalations. The mezzanine, from the river, river to Sanjiang one layer after another layer of distribution, like shingled gentle dip parallel arrangement. Their poor characters and low strength are the major engineering geological problems of this project. Indoor and outdoor infiltration deformation test results show that the muddy interlayer in the infiltration of water