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前言葛洲坝水利枢纽位于长江三峡出口南津关以下3公里的开阔河段上。在1958～1961年与1970年以来的设计施工阶段中,进行了大量的地质勘察研究。除按常规工作外,着重开展了大口径钻探、孔内电视与照像、现场大型力学试验、渗透稳定试验以及室内电子显微镜扫描、电算和地质力学模型试验研究。坝址地区复盖层较厚,基岩为具多个软弱夹层的层状岩体,产状平缓微向左岸偏下游倾
Introduction Gezhouba Dam is located in the open channel of the 3 km below the Nanjin Pass at the Three Gorges Exit of the Yangtze River. In 1958 ~ 1961 and 1970 since the design and construction phase, conducted a large number of geological survey. In addition to the conventional work, emphasis has been placed on large-bore drilling, in-hole television and photography, on-site large-scale mechanical tests, infiltration stability tests and indoor electron microscopy, computational and geomechanical model tests. The overburden is thick in the dam site, and the bedrock is a stratiform rock mass with a plurality of weak intercalations, and the shape of the bedrock is moderate and gentle to the left bank,