文档介绍：641 中国农村水利水电·2012年第6期
文章编号:1007-2284(2012)06-0146-06
卡拉水电站坝肩岩质高边坡稳定性分析
黄振科,傅少君,汤鹏
(武汉大学土木建筑工程学院,武汉 430072)
摘要:卡拉水电站大坝坝肩左岸为高陡的反倾向层状岩质高边坡,谷坡高度接近1 000m,边坡的稳定性直接关系
到坝址的选取和工程造价。利用有限元强度折减法和刚体极限平衡法,对左岸坝肩边坡在天然状态下和开挖成型条件
下多种工况的坡体稳定性进行了研究,并利用有限单元法对边坡可能的施工方案进行了敏感性分析,得出如下结论:①
,但在暴雨工况下其坡顶开挖范围外的部分坡
,存在局部失稳的可能性;②拟采取的开挖加固方案能有效的减小开挖坡体范围内屈服区,但是对坡
顶开挖范围外的坡体无太大影响。
关键词:卡拉边坡;有限元强度折减法;Sarma法;边坡稳定性
中图分类号: 文献标识码:A
An Analysis of the Stability of High Rock Slope of the Abutment in Kala Hydropower Project
HUANG Zhen-ke,FU Shao-jun,TANG Peng
(School of Civil Engineering,Wuhan University,Wuhan 430072,China)
Abstract:The abutment of Kala Hydropower Project located in the middle of Yalongjiang River in Sichuan Province of China,is
made of a high rock slope and the slope stability in the period of construction and operation is one of the key technical issues worried
about by the slope stability is directly related to the dam location and project finite element method
(FEM)and limit equilibrium theory(LET)are adopted to analyze the stability of the left bank slope before being excavated and dur-
ing its construction period under several loading conditions and the sensitivity analysis of different construction schemes,which will
be carried out,is conclusions are drawn:Firstly,the safety fact