大岩淌滑坡稳定复核抗剪强度参数的取值研究  

Determination of shear strength parameters for stability check of Dayantang landslide

作　　者：边智华[1] 余美万[1] 高鸣安[1] 杨火平 

机构地区：[1]长江水利委员会长江科学院,湖北武汉430010 [2]长江水利委员会三峡勘测研究院,湖北宜昌443003

出　　处：《人民长江》2009年第21期16-19,共4页Yangtze River

基　　金：国家自然科学基金资助项目(40772193)

摘　　要：清江水布垭水电站大坝下游左岸,距坝160 m处的大岩淌滑坡位于整个枢纽建筑物的咽喉处,施工期滑坡体稳定环境遭到了较大破坏,滑坡治理后一度在滑面产生变形突变,前沿抗滑桩体开裂。为进行滑坡稳定性复核并补充加固,进行了大量原位直剪试验,以复核滑坡的抗剪强度参数。试验表明,进行滑带土及剪切泥化带的矿化成分、颗粒组成、土的强度室内试验和反演计算与原位直剪试验成果综合分析,能为研究提供更为可靠的依据。抗剪强度参数取值时还应考虑滑坡的工况条件,对特征强度指标进行工程经验类比分析确定。At left bank downstream Shuibuya Hydropower Station,Dayantang landslide which is 160 m away from the dam is located at the throat of whole hydro-junction.The stable environment of the landslide body was greatly destroyed during construction period.Deformation mutation once occurred at the slide surface after landslide control and the front anti-slide pile crocked.In order to recheck stability of landslide and carry out supplemental reinforcement,massive in-situ direct shear tests were conducted to recheck shear strength parameters.The experimental results show that more reliable basis could be provided by comprehensive analysis of mineralization and grain composition in slide soil and shear mudded zone,strength of soil obtained by laboratory test,inverse calculation and in-situ shear test results.Landslide working conditions should be considered and analogy analysis of engineering experiences should be performed corresponding to the characteristic strength so as to determine shear strength parameters.

关 键 词：稳定性复核 抗剪强度参数取值 补充加固 大岩淌滑坡 水布垭水电站 

分 类 号：TV698.23[水利工程—水利水电工程]