1.山东大学 基坑与深基础工程技术研究中心;2.中建八局第一建设有限公司
U416.1
国家自然科学基金资助项目(51508310)；山东省优秀中青年科学家科研基金项(BS2013SF024)；
1.Foundation Pit and Deep Foundation Engineering Research Center,Shandong University;2.China Construction Eighth Bureau First Construction Co,Ltd,Shandong University
为了探究土与强风化岩边坡中岩体不破坏的临界坡率以及推导求边坡安全系数的方法,基于济南地层参数,利用plaxis3D分析出强风化岩不发生破坏的临界坡率,为相应工程提供参考；针对岩体不破坏的土与强风化岩双元边坡的圆弧平面滑动模式,利用plaxis3D和matlab软件分析边坡的应力场,运用滑移线场法得到土体圆弧和土岩交界直线组成的边坡临界滑移曲线,进而运用瑞典条分法推导出边坡稳定系数解析解。结果表明,土与强风化岩双元边坡的岩体是否破坏与边坡高度、土岩厚度及其比例相关,岩层厚度超过边坡高度一半或坡率大于1:0.5时一定破坏；并与具体案例比较得出解析解安全系数偏小,利于工程安全；针对土与强风化岩边坡,可根据本文研究结论确定边坡破坏区域,进而设计支护方案。
In order to explore the critical slope rate of soil and strongly weathered rock slope without damage and the method of deriving the slope safety factor, based on the stratum parameters of Jinan, the critical slope rate of strongly weathered rock without damage was analyzed by using plaxis3d, which can provide reference for the corresponding engineering; for the circular plane sliding mode of soil and strongly weathered rock slope without damage, plaxis3d and MATLAB software were used to analyse the stress field of the slope. The critical slip curve of the slope was obtained by using the slip line field method, and then the analytical solution of the slope stability coefficient was derived by using the Swedish slice method. The results show that whether the rock mass of the soil and strongly weathered rock dual slope is damaged or not is related to the slope height, soil rock thickness and its proportion. When the rock thickness is more than half of the slope height or the slope ratio is greater than 1:0.5, the rock mass will be damaged. Compared with the specific case, the analytical solution shows that the safety factor is smaller, which is beneficial to the engineering safety. For the soil and strongly weathered rock slope, the slope failure can be determined according to the research conclusions of this paper Then the supporting scheme is designed.
