基于ABAQUS的真空预压有限元数值模拟

本文以上海浦东某真空预压地基处理工程为算例,利用ABAQUS软件将三维问题简化为二维平面应变问题进行数值模拟分析,模拟计算中土体采用修正剑桥模型,对真空预压加固软基中的地表沉降,土体侧向位移和孔压进行有限元分析。模拟结果和实测值比较吻合,能准确地反映出真空预压加固软基土体变形的实际情况,计算结果对工程应用有一定的帮助。

Vacuum Preloading Finite Element Numerical Simulation Based on ABAQUS

A soft base reinforcement project by vacuum preloading method in Shanghai is taken as an example.The equivalent consolidation degree method is used in the paper,and the ABAQUS software is used to analyze the settlement,horizontal displacement and negative pore pressure.In the process of numerical simulation,the three dimensional problem is transformed into a two-dimension plane strain problem,and the modified Cambridge clay model was used to simulate soils.The calculation results agree well with actual measurements,and can reflect the actual distortion of soil when the vacuum preloading method is used to consolidate the soft base.The simulation results have certain help to engineering application.