基坑开挖对周边CFG桩复合地基力学性状的影响

Research on The Mechanical Behavior Effect of Around Composite Foundation of CFG Under Pit Excavation

利用有限元分析软件ANSYS建立了基坑开挖对群桩影响的有限元分析模型,并根据计算结果分析了基坑开挖深度对周边CFG桩复合地基的影响规律。考虑到桩土相互作用,建立了接触面。计算结果表明基坑开挖对中间桩的影响最大,同时也证明了采用接触面分析方法的合理性。

A numerical model was established with ANSYS software to analyze the foundation pit excavation effect on group piles,analyze the effect rule of the mechanical behavior on composite foundation of CFG by calculation. Considering pile-soil interaction, establish contact surface. The calculation results show that foundation pit excavation has the greatest effect on the middle pile,it is also demonstrated that contact surface algorithm is a proper selection in onsidering soil pile interaction