中文摘要：

为描述桩身与地基土的能量传递过程,建立了桩身单元的能量平衡方程及考虑桩身与土层能量传递过程的桩侧阻与端阻模型。将变形协调关系作为计算边界条件,得到了完整的基桩轴力、位移、侧阻及端阻计算方法。实例计算中,通过与实测工程基桩数据的对比,显示计算结果与实测曲线较为一致。结果表明,桩身能量平衡方程及反映桩土荷载-位移关系的侧阻及端阻模型能够正确描述桩、土之间的能量传递过程;该方法能够较准确的分析基桩在多层土地基中的工作性状,能够为相关工程实践提供相应的辅助资料。

英文摘要：

In order to describe energy transfer process between pile and soil,pile＇s energy balance equation as well as pile shaft and pile tip resistance transfer models considering energy transfer process were established.Furthermore,taken deformation coordination as boundary condition,the integrated calculation methods for axial force,displacement,shaft resistance and tip resistance of pile were obtained.A calculation example shows that calculation results agree well with measured ones,which proves that energy transfer process between piles and soil could be properly described by the presented equation and models.This method could also be used to precisely analyze pile＇s behavior in multi-layer foundation as a reference for engineering practices.