采用三种弹塑性模型——剑桥模型(MCC)、三维修正剑桥模型(3DMCC)和考虑各向异性的三维修正剑桥模型(ANIS-MCC),对一假想路堤进行快速加载下的固结变形有限元分析,以考察这三种模型预测结果的区别,为路基变形有限元分析时的本构模型的选取提供依据。研究结果表明,在路基未达到破坏状态以前,三种模型给出的路基变形、孔压消散的规律性基本一致;但当研究分析需要特别提高坡脚位置处地基变形预测精度时,最好采用较为复杂的能够反映土体各向异性屈服特性的模型,如ANIS-MCC模型。 Three kinds of elasto-plastic models-MCC, 3DMCC and ANIS-MCC, were used to simulate the consolidation deformation under the rapid loading of a hypothetical embankment Element analysis to examine the differences between the predicted results of the three models and provide the basis for the selection of the constitutive model in the finite element analysis of subgrade deformation. The results show that the regularity of subgrade deformation and pore pressure dissipation given by the three models are basically the same before the subgrade reaches the failure state. However, when the analysis needs to especially improve the prediction accuracy of foundation deformation at the foot of the slope, The more complex model that can reflect the anisotropic yield characteristics of soil, such as the ANIS-MCC model.