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总述基础工程地质与水文地质概况白河主坝坝址位于箱式河谷中,宽约1,000米。帷幕线所在基岩,为前震旦纪片麻岩、震旦纪石英岩与中生代侵入的火成岩——正长斑岩和石英正长斑岩。在东岸部分,风化层厚5～6米,单位吸水量大于0.2公升/分;其他部分小于0.2公升/分。复盖层为砂卵石冲积层,最大基岩埋藏深度达44米,绝大部分为
General Description Basic Engineering Geology and Hydrogeology Overview The main dam site of the Shirakawa River is located in a box-shaped valley about 1,000 meters wide. The bedrock where the curtain line is located is composed of pre-Sinian gneiss, Sinian quartzite and Mesozoic intrusive igneous-orthophical porphyry and quartz-bearing porphyry. In the eastern part of the weathered layer thickness of 5 to 6 meters, the unit water absorption is greater than 0.2 liters / min; other parts less than 0.2 liters / min. Cover layer of sand and gravel alluvial layer, the largest bedrock buried depth of 44 meters, the vast majority