关键词: 挤扩支盘桩, 荷载传递, 数值模拟, 正交分析, 优化设计

Abstract: Numerical simulation on the vertical bearing capacity of single squeezed branch pile was studied, with MIDAS finite element analysis software applied. The orthogonal analysis between the diameter of branch and the distance of branch was done. The related changes were studied, and then the optimization analysis of squeezed branch pile was done. Simulation result shows that when the distances of branches are same, the bearing capacity of the piles increases first and then decreases with the diameter of branch increased. When the diameters of branches are small, the bearing capacity of the piles doesn't change obviously with the distances of branches changed. When the diameter of branch is a certain number, the bearing capacity of the most piles increases first and then decreases with the distances of branches increased. After the analysis, when the diameter of branch and the distance of branch are primarily selected, the diameter of branch can be preferred twice as the diameter of the pile, and the distance of branch can be preferred between twice and three times of the thickness of branch.