软弱基座型斜坡变形破坏过程研究  

STUDY OF DEFORMATION AND FAILURE PROCESS OF SOFT FOUNDATION SLOPE

作　　者：任光明[1] 宋彦辉[1] 聂德新[1] 陈龙[1] 

机构地区：[1]成都理工大学工程地质研究所,成都610059

出　　处：《岩石力学与工程学报》2003年第9期1510-1513,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。

摘　　要：在现场调查的基础上,以黄河上游某电站库区一个下部有软弱基座、上部为硬岩构成的双层结构型斜坡中发育的大型滑坡为例,通过地质分析及数值模拟分析,揭示了该类斜坡的形成多以软弱基座的压缩变形为先导,从而引起上部岩体拉裂、弯曲变形,并最终受坡体内最大剪应力带控制而形成蠕滑拉裂型滑坡的特征。Based on the field investigation, the deformation mechanism of a large-scale soft foundation landslide is discussed in the area of hydroelectric power station in the upstream of Yellow River. The soft foundation slope is composed of soft rock mass in lower part and hard rock mass in upper part. It is demonstrated that the evolution of this kind of slide is always initiated by the compression of the lower soft rock mass, then the tension fracture and toppling of the upper hard rock mass occur, and at last the landslide of creep sliding-tensile fracturing type would occur along the shear stress concentration zone in the slope.

关 键 词：滑坡 软弱基座型 斜坡 变形破坏 数值模拟 

分 类 号：P642.22[天文地球—工程地质学]