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中文摘要：
采用三维有限元模型，对在堆载作用下软土与桩的相互作用进行分析，分析中考虑土的非线性和大应变，并在桩土间设置接触单元．重点研究桩土交界面上的接触应力以及土参数对土侧压力的影响．所得到的桩土交界面上的应力分布可以很好地解释离心实验结果，参数研究有助于更深刻地理解软土与桩的相互作用机理．
英文摘要：
The pile-soft soil interaction behavior under a surcharge load was investigated by means of three dimensional finite element analysis. The non-linear constitutive model and large strain were used to describe the soil, and the contact elements were defined to represent the contact behavior between the pile and the soil. The focus of study was on the contact stress at the pile-soil interface and the effects of soil parameters on the lateral pressure of the soil. The stress distribution at the interface obtained from the analysis could explain the results from the centrifuge model test, and the parametrical study will help us to have an insight into the mechanism of the pile-soft soil interaction.
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