顺层边坡岩体结构的不稳定性态研究  

Instability behavior for side slope with bedding rock mass

作　　者：杨治林[1] 

机构地区：[1]西安科技大学理学院,陕西西安710054

出　　处：《岩土工程学报》2010年第12期1888-1891,共4页Chinese Journal of Geotechnical Engineering

基　　金：教育部科学技术研究重点项目(207119)

摘　　要：针对顺层边坡岩体结构的初始缺陷特性和非完善屈曲特征,应用初始后屈曲理论和突变理论探讨了缺陷结构的后屈曲性态,分别以载荷和位移的形式确定了边坡结构分岔点附近的邻域,建立了边坡结构溃屈破坏和剪切滑动的判据,并以雅砻江下游的霸王山边坡为例给出了工程实例。研究结果表明:位能增量泛函中表征结构初始缺陷的零阶余项与尖点突变模型中的剖分因子之间具有确定的关系;顺层边坡岩体结构在其分岔点处的载荷临界值是由其突变模型的分岔集确定的;只有考虑了岩体边坡的实际缺陷,才可得出其溃屈破坏和剪切滑动的极限值。Considering the original defect and imperfection buckling characteristics for side slope with bedding rock mass,the post-buckling behavior of defect structure is studied by using the initial post-buckling theory and the cusp catastrophic model,which derives a region near the bifurcation point expressed by the load and displacement.The criteria for buckling failure and shearing slip of rock mass bedding slope are proposed,and an application example of Bawang Mountain slope located in the lower reaches of Yalu River is given.The results indicate that the zero order remainder expressing the original defect in the potential energy incremental function has determined the relation with the ripping factor in the cusp catastrophic model.The critical value at bifurcation point of the side slope with bedding rock mass is determined by its bifurcation set.The critical values of the real significant buckling failure and shearing slip can be obtained only if considering the actual defect for the side slope with bedding rock mass.

关 键 词：顺层边坡 初始缺陷 分岔集 分岔点邻域 稳定性判据 

分 类 号：P583[天文地球—岩石学]