摘要
Dr2危岩体位于马马崖一级水电站坝址左坝肩880—1010m高程的陡壁上，主要发育有两组卸荷裂隙，危岩体与后缘完整岩层已基本分离。其稳定性直接威胁到电站施工期与运行期的安全。本文通过对危岩体的整体倾倒、滑移的计算分析得出危岩体整体稳定，但存在局部倾倒的危险结论，并采用Good Man—Bray法对其局部倾倒稳定性进行了分析。最终制定出合理的工程处理措施。
The Dr2 dangerous rock mass lies in a 880m - 1010m high overhanging cliff on the left abutment at the dam site of Mamaya - 1 hydropower project, where there are two groups of developed relaxed crack. The Dr2 rock mass has basically detached from trailing complete rock, so its stability constitutes a directly threat to the safety dur- ing the construction and operation of Mamaya - 1 hydropower project. In this article the calculation and analysis of the overall dumping and slip show that the Dr2 dangerous rock mass is stable, but there is a danger of local dumping. Therefore Goodman - Bray method is used to analyze the stability of local dumping and the reasonable engineering measures are finally formulated.
