挡土墙被动土压力的库仑统一解

基于极限平衡理论,视墙后填土为服从Mohr-Coulomb屈服准则的理想弹塑性材料,指出库仑土压力理论存在的一些缺陷,明确提出极限土压力是由墙后塑性土体产生,并假定塑性区的一族滑移线为直线即平面滑裂面,建立了更为完善的滑楔分析模型,求解了在一般情况下考虑黏性土作用的挡土墙被动土压力、滑裂面土反力以及它们的分布。经典库仑和朗肯被动土压力为其特例。

Coulumb’s unified solution of passive earth pressure on retaining wall

Based on the limit equilibrium theory and by treating the backfill as an ideal elasto-plastic material which followed the Mohr-Coulomb yield criterion,some drawbacks of the Coulomb's earth pressure theory were pointed out,and it was explicitly postulated that the limit earth pressure resulted from the plastic soil body behind the retaining wall.By assuming that a family of slip lines in the plastic zone were straight lines,namely,the plane slip surfaces,a more reasonable slip wedge analysis model for clay was established to solve the passive earth pressure on the retaining wall,the reaction force on slip surface and their distributions.The classical Coulomb's and Rankine's passive earth pressures could be considered as the special cases of the solutions.