摘要
以黄河上游某电站库区一大型反倾层状岩质斜坡的变形破坏为例,通过地质分析及数值模拟分析,揭示了该类斜坡的变形破坏是岩层在自重应力作用下作悬臂梁弯曲,使岩层发生弯曲变形,导致坡体后缘开裂、根部折断,前缘发生剪切蠕变,当坡体内折断带的剪应力超过其抗剪强度时,坡体逐渐错动下滑形成倾倒塌滑体。
Based on the field investigation,geology analysis and numerical simulation of a large-scale slope in reservoir area on the upstream of Yellow River,the rules of deformation and failure of this kind of slopes are disclosed. The layered rock bends like cantilever under the effect of gravity. When rock mass in back of the slope bends to a certain extent,its root will break off and create a continuous weak surface,and shear creep will occur in the toe of the slope. When the shear stress excesses to the shear strength of the weak surface,the topple-slumping will occur in the shear stress concentration zone of the slope.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第z2期2707-2710,共4页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金(40072090)资助项目。
关键词
斜坡
反倾岩层
变形破坏
形成机制
数值模拟
slope,anti-dip layered rock mass,deformation and failure,mechanism,numerical simulation
