支盘桩承载性能的有限元分析

利用有限元分析了支盘桩的特点和荷载传递规律，研究了承载盘的位置、数量、形状、间距、盘径、盘高、土的性质及地下水位对受压支盘桩单桩受力性能的影响，通过研究发现，下部盘的承载潜力一般要大于上部盘，下部承力盘就承受着较大的荷载，应尽量将支盘设在较深处，支盘桩的盘间距不应小于临界支盘间距，支盘形状对桩的受力影响较小，盘径和盘高越大，桩承载力越高，盘径比盘高的影响要大一些，随着土体模量、内摩擦角、粘聚力、土体重度等的增大，支盘桩的承载力随之增大，地下水位越深，支盘桩的承载力越大。

The finite element analysis on bearing capacity of branch pile

Using the finite element analyzed the characteristics and load transfer mechanism of branch pile, researched the position, number, shape, spacing, branch diameter, branch high, soil nature of branch pile and the influence of groundwater to the mechanical properties of com- pressive pile. Through the study found, the bearing potential of lower branch was general greater than upper branch, the lower bearing branch bear a larger load, should try to be located in deep position. The branch spacing of branch pile should not be less than the critical branch pile spacing, the branch pile shape had little influence to pile force, the bigger of branch diameter and branch height, the higher of pile bearing ca- pacity, the influence of branch diameter was higher than branch height. As the increase of soil modulus, cohesion, internal friction angle, soil weight, branch pile bearing capacity was bigger. Underground water level deeper, pile bearing capacity increased.