某水电站导流洞施工对边坡稳定性影响分析  

Analysis on slope stability influenced by excavation construction of diversion tunnels of a hydropower station

作　　者：涂斌[1] 孙金山[2] 

机构地区：[1]中国水电顾问集团中南勘测设计研究院,湖南长沙410014 [2]中国地质大学(武汉)岩土钻掘与防护教育部工程研究中心,湖北武汉430074

出　　处：《人民长江》2014年第5期42-45,共4页Yangtze River

摘　　要：西南地区某大型水电站导流洞开挖经过一断层,施工过程中在导流洞进口边坡上部岩体中出现多条裂缝,这些裂缝对边坡稳定和后续施工安全存在不利影响。采用数值模拟方法对导流洞施工期边坡的稳定性进行分析,同时分析了洞身采取初期支护和不同施工顺序对边坡变形的影响。结果表明,边坡变形主要由断层F154控制,导流洞的施工顺序对边坡稳定的影响不大;施加锚索对控制边坡坡体变形具积极作用,可以作为该工程导流洞边坡加固的方法。During the excavation of diversion tunnel of a hydropower station in south -west China that passed through the fault, a number of cracks were found in the upper rock mass of the tunnel entrance slope, which exerted adverse influence on the subsequent tunnel construction and slope stability. The numerical simulation was used to analyze the slope stability during the ex-cavation, also the influences of initial support and different construction procedures on the slope deformation were calculated. The results show that slope deformation is mainly controlled by fault F154, and different construction procedures of diversion tunnel have a slight influence on the slope stability. Initial support of anchor cables has evident favorable effect for control of slope de-formation.

关 键 词：边坡裂缝 数值模拟 边坡加固 导流洞施工 

分 类 号：TV551[水利工程—水利水电工程]