基于深部位移监测数据定量分析的滑坡抗剪强度参数取值  

Selecting shear strength parameters of landslides based on quantitative analysis to deep displacement monitoring data

作　　者：汤罗圣[1] 殷坤龙[1] 

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074

出　　处：《中南大学学报（自然科学版）》2013年第7期2965-2970,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(41002103;41101515);中央高校优秀青年教师基金资助项目(2012049018);中国地质调查局项目(121201122017)

摘　　要：提出以滑坡峰值强度和残余强度为基础,以滑坡深部累计位移监测数据定量分析计算得到的滑带完整性指标为依据,对滑坡的抗剪强度参数进行选取。以三峡库区五尺坝滑坡为例,采用极限平衡法稳定性计算和地表位移监测数据对该抗剪强度参数选取方法结果进行检验。研究结果表明,采用此方法得到的五尺坝滑坡在所选计算工况条件下的抗剪强度参数为:滑带水上部分的内聚力c为27.99 kPa,内摩擦角Ф=17.71°;滑带水下部分的内聚力c为20.69 kPa,内摩擦角Ф=11.63°,经检验符合滑坡实际情况。A method to select shear strength parameters was proposed according to the slip zone integrity index calculated through quantitative analysis of deep displacement monitoring data of landslides based on landslide peak strength and residual strength.Taking Wuchiba landslide in Three Gorges reservoir area for example,the result was inspected using limit equilibrium method and surface displacement monitoring data.The results show that the shear strength parameters of Wuchiba landslide in the chosen calculation conditions by the proposed method are as follows： the cohesion and internal friction angle of slip zone above water are 27.99 kPa andФ=17.71°,and those of slip zone under water are 20.69 kPa and Ф=11.63°,which conforms to the actual situation.

关 键 词：深部位移监测 滑带完整性指标 抗剪强度选取 稳定性评价 五尺坝滑坡 

分 类 号：TU398[建筑科学—结构工程]