摘要
边坡主滑方向直接关系到边坡整体稳定性及边坡加固中的下滑推力计算,目前边(滑)坡主滑方向主要根据经验半经验的方法确定,如坡体内监测点位移整体矢量方向、平行于坡体底滑面或依据坡体滑动失稳机制进行相应的假设等,对于复杂边坡体则很难给出准确的主滑方向。基于最小势能原理,在坡体当前应力的基础上推导出二维和三维边坡主滑方向的理论公式,简单滑块算例和三维边坡算例验证了文中方法的合理性。除计算坡体主滑方向外,该公式还可计算沿滑移路径的主滑方向曲线,为坡体稳定性分析及剩余下滑推力计算提供更为准确的理论支持。
The main sliding direction is directly related to the slope stability evaluation and the determination of residual thrust force. At present, the sliding direction of the slope is mainly determined with semiempirical or empirical approach, such as whole vector direction of the displacements monitored inside the slope, parallel to the bottom of potential slip surface or the hypothesis made based on the failure mechanism of the slope. According to the principle of minimum potential energy, 2-D and 3-D sliding direction are rigorously deduced on the basis of current stress state of the slope. Moreover, this theoretical solution is verified to be rational by simple sliding block placed on an inclined plane and 3 D slope examples. Besides, the curve of the sliding direction angle along the slip surface is also determined, which accurately supplies theoretical foundation to slope stability problem and the determination of residual thrust force.
作者
刘素锦
郭明伟
李春光
LIU Su-jin;GUO Ming-wei;LI Chun-guang(State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences,Wuhan, Hubei 430071, China;University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education China Three Gorges University, Yichang, Hubei 443002, China)
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2018年第S2期37-44,共8页
Rock and Soil Mechanics
基金
三峡大学三峡库区地质灾害教育部重点实验室开放研究基金项目(2018KDZ02)
国家自然科学基金面上项目(No.51674239)~~
关键词
主滑方向
最小势能原理
边坡稳定
main sliding direction
principle of minimum potential energy
slope stability
