某水电站左岸坝肩边坡软弱夹层的工程特性及其对边坡稳定性的影响  

Engineering characteristic of weak seam and affection of it to slope stability of left dam abutment of a hydroelectric station

作　　者：王维早[1] 杨小荟[1] 贾磊[1] 王朝阳[1] 

机构地区：[1]石家庄经济学院工程学院,石家庄050031

出　　处：《水文地质工程地质》2007年第1期70-73,共4页Hydrogeology & Engineering Geology

摘　　要：西南某大型水电站左岸坝肩边坡分布有多层二叠系凝灰岩软弱夹层,其中对该边坡稳定性影响最大的是标记为A3的软弱夹层。本文从A3的空间展布、成因、工程分类、物质组成、物理性质、力学性质等因素进行分析,认为A3可能构成该边坡的潜在的滑动面,对该边坡的稳定性影响很大。从影响边坡稳定的因素和边坡的整体稳定性计算两个方面分析后,得出虽然A3构成该边坡潜在的滑动面,但边坡整体是稳定的。There are many weak seams made from tuff of Permian system in the slope of the left dam abutment of a hydroelectric station in southwest China, and of all the weak seams A3 has the most influence on the stability of the slope. The stability of the slope is regarded as one of the primary geological engineering problems. Through analyzing on the spacing distribution, cause of formation, engineering classification, material component, physical appearance and mechanical property of A3, it is proposed that A3 probably forms latent sliding surface, which will have great influence on the slope stability. Based on the analysis of influential factors of the slope stability and calculation result of the slope stability, this slope is considered to be overall steady although A3 probably forms latent sliding surface.

关 键 词：边坡 软弱夹层 滑动面 稳定性 

分 类 号：P642.2[天文地球—工程地质学]