不同埋管形式对混凝土能量桩受力特性的数值模拟研究

吉林建筑大学 测绘与勘查工程学院,长春 130118

能量桩; 侧摩阻力; 埋管形式; 温度循环; 固结比

Numerical simulation study on mechanical characteristics of concrete energy pile under different buried pipe forms
CHANG Hong,LI Yang,LI Zong-xiao*

School of surveying & prospecting engineering,Jilin Jianzhu university,Changchun 130118,China

energy pile; side friction; buried tube form; temperature cycle; consolidation ratio

备注

通过ABAQUS有限元分析软件,对比分析了温度循环下的不同埋管形式能量桩桩顶竖向位移、侧摩阻力及桩周土温度场变化,并分析了不同固结比时两种不同埋管形式在荷载作用下的桩顶位移及侧摩阻力变化.结果表明,不同温度作用下桩体在上部和下部分别产生负的侧摩阻力; 不同固结比时,随着固结比的增大,能量桩桩顶竖向位移逐渐减小; 在相同输入功率下,并联U型桩的换热、桩顶沉降量和桩侧摩阻力均高于单U型桩.

The finite element analysis software ABAQUS is used to analyze the vertical displacement of the pile top,the side friction resistance and the temperature change of the energy pile under different buried tube forms and under different temperature cycles.The changes of pile top displacement and side friction resistance of two different buried pipe forms under load are analyzed.The results show that,under different temperature,negative lateral friction is generated in the upper part and the lower part respectively; when the consolidation ratio is different,with the increase of consolidation ratio,the vertical displacement of energy pile top decreases gradually; under the same input power,the heat transfer, pile top settlement and side friction of parallel U-shaped piles are higher than the single U-shaped pile.