真空-堆载联合预压软土固结理论和ABAQUS模拟分析

Vacuum-surcharge Preloading Soft Soil Consolidation Theory and Simulation of ABAQUS

真空联合堆载预压法是加固软土地基的一种有效的方法.采用等效砂墙地基法,以江门市滨江大道软土路基处理工程为算例,用ABAQUS软件对真空-堆载预压加固软基中的竖向位移的影响范围进行有限元分析.在模拟过程中考虑渗透系数随饱和度的变化,这样模拟的实验数据与实测数据比较吻合,说明模拟得到的数据能更加准确的反应真空-堆载预压软基的实际情况,计算结果可以给软土地基处理提供参考.

Vacuum preloading in combination with surcharge fill preloading is an effective technology to consolidate soft soils.The equivalent sand wall foundation method is used in the paper,Jiangmen Binjiang avenue soft soil subgrade treatment engineering is taken as an example,and the ABAQUS software is used to analyze the vertical displacement and the sphere of influence in soft base consolidation by vacuum-heap load preloading.In the process of simulation,the permeability coefficient varies with the saturation of change,and the simulation data is consistent with the experimental data,which demonstrates that the simullation data can more accurately reveal the actual situation of the vacuum-heep load preloading.The calculation results can provide references for the soft soil foundation treatment.