STUDY ON TOPPLING DEFORMATION AND FAILURE CHARACTERISTICS OF STEEP BEDDING ROCK SLOPE
STUDY ON TOPPLING DEFORMATION AND FAILURE CHARACTERISTICS OF STEEP BEDDING ROCK SLOPE
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发表时间：
2009
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影响因子：
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通讯作者：
Ren Guangming
中科院分区：
文献类型：
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作者：
Ren Guangming
顺层岩质边坡是常见的边坡类型之一，对其变形破坏特征及形成机理进行了深入的研究，一般认为顺层岩质边坡变形破坏的主要特征是滑动-破裂和滑动-弯曲，通过系统的文献收集和大量的现场调查，发现顺层岩质陡坡还存在另一种典型的变形破坏形式-倾倒变形，结合顺层岩质陡坡变形破坏特征的典型工程实例，总结分析了该类边坡的地质条件和变形破坏特征，认为在河谷演化和坡体形成过程中，在坡脚最大主应力作用下，在平行于边坡的坡体上，岩层自上而下呈悬臂梁状弯曲，最后根部折断，形成倾倒体，当坡体折断区的最大剪应力大于抗剪强度时，发生滑动，滑坡发生。
Bedding rock slope is one of the common slope types.The intensive studies have been done for its slope deformation,failure characteristics and formation mechanism.Generally,it is believed that slip-rupture and slip-bending are main characteristics of deformation and failure of bedding rock slope.Through the collection of systemic references and great amounts of location investigation,it is found that there is another typical form of deformation and failure for steep bedding rock slope,namely,toppling deformation.Combining the typical engineering cases of steep bedding rock slopes with deformation and failure characteristics,the geological conditions and the deformation and failure characteristics of this kind slope are summarized and analyzed.Based on these studies,it is shown that in the process of valley evolution and slope-formation and under the maximum principal stress at the foot of slope,which is parallel to slope,rock stratum bends from top to bottom as a cantilever beam,finally its root will be broken off,and a toppling body comes into being.When the maximum shear stress is greater than the shear strength in the snapped zone of the slope,it will slip and landslide happens.