考虑土的粘滞性 ,采用粘弹塑性本构模型 ,较系统地介绍利用有限元处理真空联合堆载预压加固软基的数值方法。通过对一工程实例的数值计算 ,分析固结和流变的综合作用对地基变形的影响 ,并对工后沉降进行了预测。结果表明 ,在软基变形计算中考虑土体流变是必要的和重要的 ,它可对加固效果进行更为准确和全面的评价。 Considering the viscosity of soil, a viscoelasto-plastic constitutive model is adopted to systematically introduce the numerical method of using finite element method to treat the soft foundation consolidated by vacuum combined with surcharge preloading. Through the numerical calculation of an engineering example, the effect of consolidation and rheology on the deformation of foundation is analyzed, and the post-construction settlement is predicted. The results show that it is necessary and important to consider the soil rheology in the deformation calculation of soft foundation, which can make a more accurate and comprehensive evaluation of the reinforcement effect.