顺层岩质高边坡的静力稳定性安全评价  

Static Stability Safety Evaluation of High Bedding Rock Slope

作　　者：阎石[1] 杜海涛[1] 于琦乐 阎寒[2] 

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168 [2]辽宁电力勘测设计院,沈阳110179

出　　处：《防灾减灾工程学报》2014年第4期407-414,共8页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(51278313);辽宁省自然科学基金项目(201202180)资助

摘　　要：工程边坡环境直接关系到工程的经济效益,顺层岩质高边坡的稳定性主要受软弱结构面的构造和力学性能的影响。采用基于强度折减法的边坡安全系数作为边坡稳定性的评价指标,使用FLAC3D软件对顺层岩质高边坡稳定性进行了非线性有限元分析,分别探讨了结构面倾角和剪切强度、边坡坡率以及边坡高度对其稳定性的影响规律,着重提出了顺层岩质高边坡的两种破坏模式以及滑移剪切破坏的机理;并采用层次分析法定性比较了边坡稳定性对各影响因素的敏感性。结果表明,结构面剪切强度对边坡稳定性影响的权重最大,结构面倾角次之,边坡坡率及边坡高度的影响相对较小。Slope environment is directly related to the economic benefit of an engineering project. The stability of high bedding rock slope is mainly affected by the construction and mechanical properties of weak structure planes. In this paper, the slope safety factor based on the strength reduction method （SRM） was used as the slope stability evaluation index. The FLAC3D software is applied to a nonlinear finite element analysis （NFEA） of the stability of the high bedding rock slope, and the influence law of the inclination and shear strength of the weak structure plane, slope gradient and slope height on its stability was numerically discussed, respectively. And two failure modes of the high bedding rock slope and the sliding shear failure mechanism were em- phatically put forward. The analytical hierarchy process （AHP） was adopted to compare the sen- sitivity of the slope stability in various influencing factors. The results show that the weight of the structural plane shear strength for the slope stability is the largest one, the structural plane inclination is the second one, and the influence of the slope gradient and the slope height is rela- tively small.

关 键 词：顺层岩质高边坡 强度折减法 结构面 敏感性分析 

分 类 号：TU457[建筑科学—岩土工程]