将水泥土搅拌桩支护结构及土体视为共同变形的整体,建立了三维有限元模型,选用Drucker-Prager本构模型及非线性增量迭代法,以泉州某基坑为工程原型,利用ANSYS工程计算软件,进行了模型验证,并详细讨论了各支护参数变化时水泥土搅拌桩的位移、应力分布。揭示了地面堆载、墙体厚度、不同土层性质及其分布对搅拌桩位移、应力的影响,墙体位移和应力的关系,分步开挖对搅拌桩位移的影响及合理布置开挖步需考虑的因素。 The cement-soil mixing pile supporting structure and soil are regarded as the whole deformation. A three-dimensional finite element model is established. Drucker-Prager constitutive model and nonlinear incremental iterative method are selected to use a foundation pit in Quanzhou as an engineering prototype. ANSYS engineering calculation software was used to verify the model, and the displacement and stress distribution of cement-soil mixing piles were discussed in detail when each supporting parameter was changed. It reveals the impact of ground loading, wall thickness, different soil properties and their distribution on the displacement and stress of mixing piles, the relationship between wall displacement and stress, the influence of step excavation on the displacement of mixing piles and the rational arrangement of excavation steps. Factors to consider.