[2018年最新整理](修改图1、2)均质边坡稳定性极限曲线法.doc

均质边坡稳定性极限曲线法 方宏伟1，李长洪2，李波1 (1辽宁交通高等专科学校 道桥系，沈阳 110122；2北京科技大学 土木与环境工程学院，北京 100083) 摘 要：基于滑移线场理论提出了边坡极限曲线法特征线的极限坡面曲线与坡面相交为破坏，定义了安全度和破坏度两个考题例，随着节点的增加例安全系数与具有可比性，因素敏感性分析结论与一致破坏 Limit curve method of homogeneous slope stability FANG Hong-wei1，LI，LIDepartment of Road and Bridge, Liaoning College of Communication, Shenyang 110122, China； 2 School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China) Abstract: Based on the theory of slip line field, this paper proposes the limit curve method of slope stability according to the deformation situation; the method is the inverse process for computing a heavy slope ultimate load and the dual process of strength reduction method. The paper defines two evaluation indexes: the Degree of Safety (DOS) and the Degree of Failure (DOF) according to the deformation failure criterion of the limit stable slope curve and the slope surface intersection computed by characteristic line difference method (SCM) and the slope limit experimental approximate formula (CCM). The method does not require assuming and searching critical slip surface. Classic exams and typical examples show that with the increase of nodes, the accuracy of SCM increases; when boundary step is constant, the judgment value obtained by three spline interpolation is unchanged, which proves the stability of SCM. Typical examples show that the larger the slope angle becomes, the lower the slope stability is, limit slope curve and slope is from without intersection to intersection, which proves that the correctness of the deformation failure criterion. Comparing the results from the two examples shows that the safety factor is large and SCM/CCM results are comparable; this paper increases external load relative to the original boundary conditions, so the safety factor becomes smaller, SCM/CCM is conservative. To calculate the correct rate, this paper uses 34 samples: safety factor method is 67.7%, the stress state method