本文按邓肯-张的非线性弹性模型,用有限元法计算各种情况下饱和软粘土地基随荷载的增长而增长的位移、应力与应力水平,从而探讨软粘土地基塑性区(即剪切破坏区)的发源、扩展与交遇等的规律。文中假设粘土在土自重应力作用下正常固结,在增荷过程未发生排水固结。最后分析了现场荷载试验结果,初步验证了本文的计算方法。 In this paper, according to Duncan-Chang’s nonlinear elastic model, the displacement, stress and stress levels of the saturated soft clay foundation with increasing loads under various conditions are calculated by using the finite element method to explore the plastic zone of the soft clay foundation (ie shear failure). The origin, expansion, and encounter of the district). It is assumed that the clay is normally consolidated under the self-gravity stress of the soil and no drainage consolidation occurs during the unloading process. Finally, the results of field load tests are analyzed and the calculation method of this paper is preliminarily verified.