挡土墙土体复合破裂面主动土压力分析

Analysis of active earth pressure on retaining wall with complex fracture plane of soil

基于普朗德尔-瑞斯纳课题认为,挡土墙土体破裂面是由对数螺线与直线组成的复合滑动面的结论,采用极限平衡法和约束优化相结合的方法,重新推导了主动土压力及其合力和作用点高度的计算公式。在此基础上分析了主动土压力在纵向的分布特征,并讨论了主要参数对破裂面、主动土压力及其合力和作用点的影响。

On account of the conclusion of L.Prandtl-H.Reissner topic, which thinks fracture plane behind retaining wall is made up of a logarithmic spiral and a straight line, and by using limit equilibrium and constrained optimization, the formulas of active earth pressure, the resultant force of earth pressure and its application point are obtained. The distribution characteristics of active earth pressure in the vertical direction are analyzed. The effects of main parameters on fracture plane, active earth pressure, the resultant force of earth pressure and its application point are investigated in detail.