考虑桩-土接触面及桩底土非线性的单桩Q-s曲线分析

Analysis of Q-s curve of single pile considering non-linear behavior of reaction of pile bottom and interface between pile and soils

假定桩周围的土体为半空间无限体 ,桩由一系列受压单元组成 ,在桩土之间有一层无限薄的非线性接触面 ,传递桩土之间的剪力。认为接触面的剪力和剪切位移之间的关系是非线性的。此外 ,还考虑了桩底土反力的非线性 ,认为桩底反力与位移之间的关系亦为非线性。根据体系中结点力的平衡条件 ,建立了求解方程 ,并给出了两个算例 。

In this paper, the soil is looked as elastic body in half unlimited space, and there is an interface between the soil and the pile, which can transfer shear force The relationship between shear force and shear displacement of the interface is considered non-linear, and the relationship of the force and the displacement of the pile bottom is considered non-linear too Base on the equilibrium of node forces a new method analyzing the load-settlement curve of single pile is proposed The suitability of this analysis method is shown by two examples analysed in the paper