变截面桩承载能力理论分析与数值模拟研究

Theoretical Analysis and Numerical Simulation Research on the Bearing Capacity of Variable Cross-section Piles

采用ABAQUS有限元分析软件对基桩进行数值模拟,分析变截面桩的承载能力特征值和桩身内力以及桩顶竖向荷载的传递特性。变截面桩能把桩顶荷载作用传递到更深土层中,侧摩阻力作用更大限度地发挥,使得该范围内的桩身承载利用效率提高;变截面处的端阻力作用提前且更充分地发挥,且产生侧阻增强效应,变截面附近的侧摩阻力更大限度地发挥。

The ABAQUS finite element analysis software is used to analyse the characteristics of the bearing capacity and the internal forces of the variable cross-section piles and the vertical load transfer mechanism of the pile top.The variable section pile can transfer the load of the pile top to a deeper soil layer.The side friction resistance is maximized and the utilization of the bearing capacity of the pile is significantly improved.The end resistance of the pile section is played in advance and more fully,and the side resistance enhancement effect is generated,and the side friction resistance near the variable section can be played to a greater extent.