黏土地基中能量桩受力特性数值模拟分析

吉林建筑大学 测绘与勘查工程学院,长春 130118

能量桩,位移,轴力,侧摩阻力

Numerical simulation analysis of force characteristics of energy piles in clay foundation
CHANG Hong,LIU Jin-nan

CHANG Hong,LIU Jin-nanSchool of surveying & prospecting engineering,Jilin Jianzhu university,Changchun 130118,China

energy pile,displacement,axial force,side friction

备注

本文基于COMSOL Multiphysics,对能量桩在加热和制冷不同工况下桩顶竖向位移、桩身轴力及侧摩阻力的变化进行了数值模拟.结果表明,能量桩桩顶位移会随时间增长而增加最终趋于平稳.桩体应力会随桩体深度先增大,达到峰值后又缓慢减小,峰值大概位于桩体中部.不同温度作用下桩体会在上半部与下半部分别产生负摩阻力.

Based on COMSOL Multiphysics,this paper changes the vertical displacement of the pile top,the axial force of the pile body and the side friction resistance of the energy pile under different heating and cooling conditions.The research shows that the top displacement of the energy pile will increase with time and eventually stabilize.The pile stress will increase first with the depth of the pile,and then slowly decrease after reaching the peak.The peak is located in the middle of the pile.Under different temperature effects,the pile will produce negative frictional resistance in the upper half and the lower half respectively.