Rankine土压力理论的改进算法

IMPROVED METHOD OF RANKINE EARTH PRESSURE THEORY

利用Rankine土压力理论进行挡土墙土压力计算 ,计算结果常与实际测得的土压力偏差较大 ,Rankine土压力的分布与实际也有很大出入。而且挡土墙后土体破坏时 ,并不是土体中各点都达到极限平衡状态。针对Rankine土压力理论的这些缺点 ,考虑到墙土间摩擦角δ及地下水的影响 ,采用微单元片体的分析法对Rankine土压力公式作进一步改进 ,得出了较为符合实际的土压力计算公式。

The earth pressure value calculated by Rankine earth pressure theory often deviates from the measured value,and the distribution of Rankine earth pressure differs from the practical one.When the soil behind the retaining wall is destroyed,not every point of the soil is under the state of ultimate equilibrium.With reference to the shortcomings of Rankine earth pressure theory,the finite element flake is used to improve the formula of Rankine earth pressure.Meanwhile,in consideration of the two effects of the angle δ between the wall and the soil,and under ground water on earth pressure,the formulas reduced comparatively accord with the practical earth pressure.