根据张氏法对普通桩在水平荷载下的解析解,对挤扩支盘桩桩身按直径不同分成若干段,在每一段上运用直桩的解析解。由各段在共用节点处的变形协调条件,结合初始条件和边界条件,求出所需参数,得到挤扩支盘桩水平荷载作用下的解析解。计算一定荷载作用下桩身的水平位移,并与有限元计算结果相比较,然后用有限元方法分析了桩身参数和桩周土参数对挤扩支盘桩水平承载力的影响。 According to Chang’s method, the analytic solution of ordinary pile under horizontal load is divided into several sections according to different diameters, and the analytical solution of straight pile is used in each section. According to the deformation coordination conditions of each segment at the common node and the initial conditions and boundary conditions, the required parameters are obtained, and the analytic solution under the horizontal load of the squeezed branch pile is obtained. The horizontal displacement of the pile under a certain load is calculated and compared with the finite element calculation results. Then, the influence of pile parameters and soil surrounding parameters on the horizontal bearing capacity of the squeezed branch pile is analyzed.