考虑岩土体变形的边坡临界高度上限解  

Upper-bound solution of critical height of slope considering soil and rock deformation

作　　者：崔新壮[1] 王爱营[2] 刘雁冰[2] 冯洪波[1] 

机构地区：[1]山东大学土建与水利学院,山东济南250061 [2]滨州市公路管理局,山东滨州256614

出　　处：《山东大学学报（工学版）》2006年第5期73-76,81,共5页Journal of Shandong University（Engineering Science）

基　　金：国家973项目(2002CB412706);国家自然科学基金项目(10372104)资助

摘　　要：考虑岩石和土体变形,取对数螺旋面为破坏面,利用塑性力学中的极限分析方法对边坡的临界高度进行了研究.由库仑材料相关联流动法则推得了变形破坏区的速度场.由变形破坏机构得到了边坡临界高度上限解随坡角及岩土内摩擦角的变化规律.并通过比较发现:变形破坏机构对应的上限解略小于刚体平动机构对应的上限解,略大于刚体转动机构得到的上限解.Considering rock and soil deformation and using logspiral failure surface, the limit analysis method in plastic mechanics was used to solve the critical height of slope. The velocity field of deforming region was obtained from the associated flow rules for Coulomb materials. The variation rule of the critical height obtained from deforming failure mechanism with the intemal friction angle of soil and rock and slope angle was studied. It is found by comparison that the upper-bound solution of critical height from deforming failure mechanism is less slightly than that from rigid blocks translational failure mechanism, and more slightly than that from rigid blocks rotational failure mechanism.

关 键 词：边坡 临界高度 变形 极限分析 

分 类 号：TU413.62[建筑科学—岩土工程]