小湾拱坝坝肩岩体稳定分析

根据小湾坝址区断层及节理裂隙等结构面的分布状态，分析了坝肩岩体潜在的滑移边界，并作了最不利产状的分析确定．通过多种滑移型式及荷载组合分析，明确了小湾拱坝坝肩岩体的控制滑移型式及荷载工况．此外，在坝肩岩体稳定分析中，还进行了渗透压力及岩体抗剪强度指标的浮值分析，明确了影响小湾坝肩岩体稳定的主要控制因素．

Rock Mass stability Analysis to the Abutments of Xiaowan Arch Dam

According to the constructional distribution of faults and jiont fissures within Xiaowan damsite,the authors analyzed the potential sliding boundaries of the abutment rock mass.The most unfavorable attitude was analyzed.After having analyzed various sliding types and composition of loads, the controlling sliding type and load performances of the abutment rock mass under the xiaowan Arch Dam was clear.Furthermore,analysis to the floating values of rock mass shear strength index and seepage pressure was made while the authors was analyzing the stability of abutment rock mass.The primary controlling factors of the stability of the abutment rock mass at Xiaowan Hydropower Station is clear nowadays.