小湾水电站厂房进水口高边坡稳定性研究

Study of Powerhouse Intake High Slope Stability for Xiaowan Hydropower Project

围绕小湾电站厂房进口高边坡的稳定性问题 ,利用前期研究中开发的岩体分类、软弱夹层的取样、试验和分析方法、结构面网络模拟、边坡稳定的极限分析等成果 ,在进一步发展完善的基础上进行了综合研究。研究结果表明 ,f3断层对进水口边坡的稳定性起着控制作用 ,由 f3断层和卸荷裂隙组合形成的楔体破坏是小湾电站厂房进口最典型也是最主要的失稳模式。因此 ,本文将重点介绍对 f3断层进行的专门试验以及对

To solve the powerhouse intake high slope stability problem for the Xiaowan Hydropower Project a further comprehensive study was made based on the results of rock mass classification, sampling of soft seams, test and analysis, shearing plane network simulation and slope stability limit analysis developed in the early stage study . The study results reveal that the fault f3 has control of the intake high slope stability, and the wedge-shaped failure caused by combination of the fault f3 and the relaxed fissures is a principal instability pattern of the Xiaowan powerhouse intake structure. This paper gives priority to a presentation of the special tests carried out for the fault f3, and the stability analysis and study results of the wedge formed by combination of the fault f3 and the relaxed fissures.