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卜寺沟水电站库坝址区有29处坠落式危岩体,为此选择左坝肩边坡ZBJ-07典型坠落式危岩体为研究对象,针对该危岩体工程地质条件,从定性角度采用赤平投影图解法初步判断可能的失稳破坏区域,再从定量角度采用悬臂梁理论找到该危岩体破坏的最危险点,进而评价出自然状态、暴雨及地震状态下的ZBJ-07危岩体均处于不稳定状态。采用与ZBJ-07坠落式危岩体相同的方法评价了另28处坠落式危岩体。结果表明,卜寺沟水电站库坝址区坠落式危岩体有8处基本稳定,可不处理;21处不稳定或欠稳定,应予以清除。
There are 29 falling rock mass bodies in the reservoir dam site of BuShiGou Hydropower Station. Therefore, ZBJ-07 typical falling rock mass of the left abutment slope is selected as the research object. According to engineering geological conditions of the rock mass, By using the stereographic projection method to determine the possible destabilization damage area and then using the cantilever beam theory to find out the most dangerous point of the dangerous rock mass destruction from the quantitative point of view, the ZBJ-07 dangerous rock under natural conditions, heavy rainstorms and earthquakes can be evaluated. Body are in an unstable state. In the same way as the ZBJ-07 falling rock mass, another 28 falling rock masses were evaluated. The results show that there are 8 places at the reservoir dam site of Baishigou hydropower station, which are basically stable and can not be treated. The unstable or unstable areas at 21 are to be removed.