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1 概述石漫滩水库始建于1951年,为均质土坝,1975年8月因特大暴雨溃坝失事,1993年9月开始复建,1998年元月通过国家验收。新坝为全断面碾压砼坝,是兼顾防洪除涝,工农业及城市生活供水的综合性水利工程。石漫滩坝址持力层为厚层及中厚层细粒石英砂岩,块状结构,层理明显,岩性坚硬,裂隙发育普遍,具有硬、碎、脆的特点。断裂构造以陡倾角为主,层面和裂隙夹泥层分布普遍,且透水性较大,尤以河床7~#、8~#、9~#坝段最具代表性。河床坝段基岩有两
1 Overview Shimanan Reservoir was built in 1951 as a homogeneous earth dam. In August 1975, the dam collapsed due to heavy rainfall and began reconstruction in September 1993. It passed state inspection in January 1998. The new dam is a full-face roller compacted concrete dam, which is a comprehensive water conservancy project that takes flood prevention, waterlogging, industrial, agricultural and urban water supply into consideration. Shihupan dam site holding layer is thick and medium-thick fine quartz sandstone, block structure, layering obvious, hard rock, crack development is common, with hard, broken, brittle characteristics. The fault structure is dominated by steep dip, and the distribution of layers and fractures is widespread and the water permeability is large, especially in the 7 ~ #, 8 ~ # and 9 ~ # sections of the riverbed. There are two bedrock bedrock