小湾电站进水口高边坡稳定性研究

为了确定小湾电站边坡的最小安全系数,利用UTEXAS2软件对进水口正面、侧面共7个剖面进行了分析计算,对侧面采用圆弧搜索法计算安全系数,给出最危险滑移线;对正面边坡,根据其缓倾角断层和陡倾角结构面,采用非圆弧搜索法对指定滑面进行计算,将最危险的f3断层及gm89 8断层与各陡倾角结构面进行组合,得出当f3与陡倾角结构面f12进行组合时,在剖面6处安全系数最小的结论.

Stability analysis of high inlet slope for Xiaowan Hydropower Station

For determination of the lowest safety coefficient of the side slope at the inlet of the Xiaowan Hydropower Station, the software UTEXAS2 is used for calculation of the safety coefficient of seven sections of the inlet. For the lateral sections, the arc search method is used to calculate the safety coefficient, and further to derive the sliding line under the most dangerous condition, and for the front slope, the safety coefficient is calculated for the specific sliding plane according to its low angle fault and high dip angle structural plane. The most dangerous fault f 3 and fault g m89 8 are combined with the structural planes of different high dip angles, and it is concluded that the safety coefficient is the lowest at section No.6 under the combination of f 3 with the high dip angle structural plane f 12 .