长江三峡大石板滑坡计算参数反分析  

Back analysis of calculation parameters for Dashiban landslide at Three-Gorges Reservoir on Yangtze River

作　　者：高德军[1] 徐卫亚[1] 郭其达[2] 

机构地区：[1]河海大学岩土工程研究所,江苏南京210098 [2]三峡大学土木工程学院,湖北宜昌443002

出　　处：《河海大学学报（自然科学版）》2006年第1期74-78,共5页Journal of Hohai University(Natural Sciences)

基　　金：国家重点基础研究发展规划项目(2002CB412707)

摘　　要：在研究长江三峡库区大石板滑坡约束条件和某一确定计算状态的基础上,利用极限平衡理论方法对滑坡的滑带土进行了计算参数反分析,并通过敏感性分析确定了计算参数的取值.结果表明:计算参数c(黏聚力),φ(摩擦角)值的反分析存在解的非唯一性,只有确定了边坡的临界状态并选定相应的评估指标后,才有可能获得准确结果;反分析得到的滑带土c,φ值与临界状态的滑带赋存条件相对应,当进行其他工况的稳定分析及工程设计时,应根据经验及工程类比结果进行折减.Based on a study of constraint conditions and specific computation status of the Dashiban landslide in the Three-Gorges Reservoir region, a back analysis was made of calculation parameters of the soil in slide zone by use of the limit equilibrium method, and the parameter values were determined by sensitive analysis. The result shows that the values of parameter c and φ derived from back analysis are not unique, and that the accurate values can be obtained only after determination of the critical state of the landslide and selection of the corresponding evaluation indices. It is also indicated that the values of parameter c and φ are in accordance with inherent conditions of the landslide in critical state. However, in other cases of stability analysis and engineering design, the values should be modified according to experiences and comparison with similar projects.

关 键 词：长江三峡 大石板 滑坡 反分析 计算参数 

分 类 号：P642.22[天文地球—工程地质学]