差异沉降是群桩复合地基研究中一个不容忽视的问题，往往使得结构产生不良内力.传统的解决方法是采用改变桩长、桩距、桩径等来实现地基的刚度调平.支盘桩是一种具有高承载力和低沉降量特性的新型桩，通过差分分析软件FLAC 3D对挤扩支盘桩、基础、土层共同作用进行模拟，并对挤扩支盘桩的参数进行敏感性分析,最终达到减少和消除差异沉降的目的，使结构布置更加合理.

Differential settlement of composite foundation cannot be ignored, and often brings undesirable internal force to the structure. Traditional solutions are to change length, spacing, and diameter of the pile to achieve even foundation stiffness. Squeezed branch pile is a new type of pile with high pile capacity and low settlement. This paper simulates the interaction between squeezed branch pile and soil using the finite difference analysis software FLAC 3D, and get the best solution to reduce, or even eliminate, differential settlement, leading to a more reasonable structural arrangement.