强夯处理高填方的大变形有限元数值模拟

Numerical Simulation for Stepped Reinforced Soil Retaining Wall

根据强夯处理高填方时土体存在局部大变形的特点,运用非线性有限元理论,导出弹塑性大变形有限元动力平衡方程,对高填方强夯处理进行数值模拟,得到夯坑形状、土体应力变化及塑性区演化等结果。研究表明,采用弹塑性大变形有限元动力分析方法模拟高填方的强夯处理过程是可行的,其力学分析与传统方法相比更加精细,模型更加符合强夯加固的实际特征,数值模拟结果与现场试验吻合较好,对强夯加固机理研究和工程实践具有较高的参考价值。

According to the local large deformation in dynamic consolidation for high earth fill, a elasto-plastic large-deformation dynamic balance equation is derived nonliear finite element theory. subsequently, the dynamic consolidation process for high earth fill is simulated, and the ramming hole shape, stress history of soil and plastic zone development are obtained. The research showes that the dynamic consolidation process simulated by elasto-plastic large-deformation dynamic FEM is feasible, the model is more consistent with the factual characteristic of dynamic consolidation, the numerical results are basically accordant with those of site test, which provides a reference for mechanism investigation of dynamic consolidation and engineering application.