饱和软土地基排水固结法的流固耦合计算模型

The Fluid-solid Coupled Model Analysis on the Reinforcement of Saturated Soft Foundation with Drainage Consolidation Method

对处理饱和软土地基时采用排水固结法进行相应的简化 ,提出 3点假定 ,结合Biot固结理论 ,建立了该问题的流固耦合模型的控制方法 ,从而较好地考虑了排水条件对材料参数的影响 ,依据迭加原理 ,对地基的初应力条件进行简化 ,获得了体积压缩与土体骨架压力和孔压间的对比关系 ,并由虚功原理建立了饱和软土地基排水固结法流固耦合问题的有限元计算格式 。

In this paper, the reinforcement construction in soft ground by using drainage consolidation method is simplified and 3 suppositions have been put forward. Based on the Biot consolidation theory, the control equation of the method with the fluid solid coupled model has been established. The influence of physical properties by drainage condition has been taken into account. According to addition method, the original stress of ground is simplified, and the relation between bulk condensation and the stress of soil framework and pore pressure is drawn. The finite element method of fluid solid coupled model has been founded by the principle of virtual work, the effect of soft foundation treatment by the method of drainage wells at different space is analyzed.