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修建在长江丘陵区开阔河谷地段上的某大型河床式水电站,其基础为多层软弱夹层的下白垩统陆相地层,产状平缓。深基坑开挖后,岩体沿某些软弱夹层产生了较显著的水平错动。本文根据现场观测成果,论述了岩体变形特点,分析了产生岩体变形的原因和影响,为设计部门研究并确定工程措施提供了依据。本文曾在今年九月于马德里召开的第三届国际工程地质会议上进行了交流。
The construction of a large riverbed hydropower station in the open valleys of the hilly area of the Yangtze River is based on the Lower Cretaceous continental facies with multiple layers of weak intercalations and is gentle in shape. After excavation of deep foundation pit, the rock mass produced some significant horizontal dislocation along some weak intercalations. Based on the field observation results, this paper discusses the deformation characteristics of rock mass, analyzes the causes and effects of the rock mass deformation, and provides the basis for the design department to study and determine the engineering measures. This article was held at the Third International Engineering Geology Conference held in Madrid in September this year.