三向应力作用下的Rankine被动土压力公式  

FORMULA OF RANKINE PASSIVE EARTH PRESSURE IN TRIAXIAL STATE OF STRESS

作　　者：陈秋南[1] 张永兴[2] 周小平[2] 

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201 [2]重庆大学土木工程学院,重庆400045

出　　处：《岩石力学与工程学报》2005年第5期880-882,共3页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家"十五"科技攻关计划项目(2001BA604A02)

摘　　要：基于Mohr-Coulomb理论推导的Rankine被动土压力计算公式,只考虑大小主应力的影响,没有考虑中间主应力的影响,而三向应力作用的双剪强度理论克服了Mohr-Coulomb屈服准则的不足,使被动土压力公式在三向应力作用下推导出来,更加符合实际,实例演算表明三向应力状态下的被动土压力值大于经典Rankine被动土压力值,计算结果用于设计更偏于安全。The traditional formula of Rankine passive earth pressure of retaining wall is deduced based on Mohr-Coulomb strength theory in which the intermediate principal stress is not considered. In this paper, the formula of Rankine passive earth pressure of retaining wall in triaxial state of stress is established based on twin shear strength theory. A calculation example shows that the passive earth pressure of retaining wall is increased when the influence of the intermediate principal stress is considered.

关 键 词：土力学 三向应力状态 双剪强度理论 被动土压力 

分 类 号：TU432[建筑科学—岩土工程]