科哈拉水电站厂房后边坡及基坑稳定分析  

Stability Analysis of Slope and Foundation Pit of Kohala Hydropower Project

作　　者：许艇 苏通[1] XU Ting;SU Tong(China Water Resources Beifang Investigation,Design and Research Co.Ltd,Tianjin 300222,China)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222

出　　处：《海河水利》2021年第2期76-79,82,共5页Haihe Water Resources

摘　　要：边坡稳定一直是工程建设中不容忽视的问题,对工程安全及稳定运行起着至关重要作用,而基坑开挖及支护过程中的边坡稳定也是施工过程中的重要关注点。结合巴基斯坦科哈拉水电站厂房后边坡及基坑开挖支护设计,综合采用极限平衡法及强度折减法对高边坡、复杂地质条件、深覆盖层下的边坡稳定进行分析。采用施工步进行分步开挖及支护,计算及分析不同施工步下边坡及半地下厂房基坑的稳定性,最终得出适合当前边坡及基坑设计方案下的支护方式,论证不同工况下厂房后边坡及基坑的稳定性。Slope stability,which plays a vital role in the safety and stable operation of the project,has always been a problem that can not be ignored in engineering construction.Meanwhile,the stability of foundation pit excavation and support⁃ing structure is also an important concern in the construction process.In this paper,based on the excavation and support de⁃sign of the slope and foundation pit behind the powerhouse of Kohala Hydrowpower in Pakistan,the stability of high slope,complex geological conditions and deep overburden is analyzed by using limit equilibrium method and strength reduction method.The construction step is adopted to carry out excavation and support step by step,and the stability of slope and foundation pit of semi-underground powerhouse under different construction steps is calculated and analyzed.Finally,the supporting mode suitable for the current slope and foundation pit design scheme is obtained,and the stability of the slope and foundation pit behind the factory house under different working conditions is demonstrated.

关 键 词：边坡支护 基坑稳定 极限平衡法 强度折减法 

分 类 号：TV731[水利工程—水利水电工程] TU271.1[建筑科学—建筑设计及理论]