中部“砥柱”锁固平面旋转切向层状岩质滑坡启动力学机理与稳定性判据

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 成都山地所知识仓储（2009年以前）

	中部“砥柱”锁固平面旋转切向层状岩质滑坡启动力学机理与稳定性判据
	崔鹏
刊名	岩石力学与工程学报
	2004
卷号	23 期号:16 页码:2718-2725
关键词	岩石力学滑坡平面旋转切向层状岩体启动机理稳定性判据
其他题名	DYNAMICS AND STABILITY CRITERION OF OBLIQUE LAYERED LANDSLIDE WITH PLANE ROTATION UNDER LOCKUP OF CENTRIC SEGMENT
合作状况	国内
中文摘要	中部“砥柱”锁固平面旋转滑坡,是切向层状岩质斜坡在特殊的边界条件控制下,发生渐进性变形而形成的。其主要特征是:在平面上,滑体中部的潜在滑床面部位,岩层抗剪强度较高,出现坡体变形的相对锁固段;而由滑体中部向周围边界,坡体变形逐渐增大,且变形岩体围绕着滑体的中部呈现出平面旋转变形之趋势。引起滑坡平面旋转的根本原因是滑体在变形时,其所受诸力的合力不通过滑体重心,从而产生了使滑体发生旋转的力矩。其变形与破坏模式可以概化为:在自重力、滑床摩擦力、滑床锁固段阻力和滑体周围边界处围岩切层阻力的共同作用下,圆环状岩块(岩板)所发生的平面旋转变形以及临界状态下“锁固段”的旋转破坏问题。基于弹性力学的平面应力问题,分析了圆环状岩块的旋转应力场;并应用极限平衡方法,分析了旋转滑坡下滑失稳的启动条件和旋转滑动的力学机理,建立了滑坡稳定性的判据。
英文摘要	Landslide with plane rotation under lockup of centric segment is formed in the course of progressive failure of layered rocks on the oblique bank slope. It is characterized that there exists a relative locked segment on bedding plane around the center of a landslide body with bigger shear strength and torsion sliding impeded,whereas the movement of slope increases gradually from the center to the outer segment in which the layered rock mass spins around a hinge located in the center on potential bedding plane. The reason why landslide exhibits plane rotating is that resultant of forces acting on the landslide body does not traverse its center of gravity,which results in a moment of rotation. So the deformation and failure mode of landslide can be described by rotation of a circled rock slab with inner fixed part under combined loading of gravity,friction forces on potential bedding plane,shear strength in centric part,and resistance to rotating on boundary. By means of elasticity theory,the rotation stress field of the circled layered rocks is deduced. Furthermore,the triggering condition of rotating glide is studied and onset mechanism and stability criterion of landslide are established with the approach of limit equilibrium. The study result is proved to be effective in the quantitative evaluation of stability of this kind of landslide.
资助信息	国家自然科学基金(40172093;50008016);国家杰出青年科学基金(40025103);教育部科学技术研究重点项目(03143);“地质灾害防治与地质环境保护国家专业实验室”开放基金项目资助
语种	中文
公开日期	2011-05-18
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/3129]
专题	成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前）成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
推荐引用方式 GB/T 7714	崔鹏. 中部“砥柱”锁固平面旋转切向层状岩质滑坡启动力学机理与稳定性判据[J]. 岩石力学与工程学报,2004,23(16):2718-2725.
APA	崔鹏.(2004).中部“砥柱”锁固平面旋转切向层状岩质滑坡启动力学机理与稳定性判据.岩石力学与工程学报,23(16),2718-2725.
MLA	崔鹏."中部“砥柱”锁固平面旋转切向层状岩质滑坡启动力学机理与稳定性判据".岩石力学与工程学报 23.16(2004):2718-2725.