安康水电站在施工中进行的补充地质勘探,发现在坝基深层有缓倾角构造结构面,从而产生了大坝坝基深层滑动失稳问题。由于中孔坝段位于第一期基坑内,故而先对中孔坝段坝基深层的滑动问题及其处理措施进行了研究,分析了滑动破坏机理,拟采用在缓倾角构造结构面设置混凝土硐塞和加长加厚消力池底板及护坦为主的处理方案。现将对采用上述方案的分析情况和研究结果扼要介绍如下。 Ankang Hydropower Station in the construction of the supplementary geological exploration, found in the deep dam dike tectonic structure surface, resulting in deep dam instability dam. Because the mid-hole dam is located in the first-phase foundation pit, the problem of deep sliding in the dam foundation of Zhongkeng dam and its treatment measures are firstly studied. The mechanism of sliding failure is analyzed. It is proposed to adopt a concrete- And longer thickened Stirred pool floor and protection of the main treatment programs. The analysis of the use of the above programs and the results of the research are summarized below.