基于Chow模型计算桩基础沉降

Analysis on Settlement of Pile Foundation Based on Chow Model

Randolph的近似解析解可计算线弹性土体,且土的剪切模量随深度不变或者线性增加条件下的桩基础沉降。Chow(1986)在此基础之上,结合荷载传递法,建立了一种层状模型,可用于计算任意分层土条件下单桩以及群桩的沉降,并将计算分析扩展至土体的非线性。基于该模型在均质线弹性土体条件可计算出两桩的相互作用系数,将其与严格意义上的弹性理论法进行对比,可得出在一般条件下应用Chow模型计算桩基础沉降的精度能够得到保证的结论。

Closed form solution by Randolph could be used to calculate linear deformation soil, where shear modulus unchanged or grow linearly with depth. United with load transfer method, Chow constituted a layered model, which could be used to calculate settlement of pile foundation in arbitrary layered soil condition, and the analysis was extended to nonlinear deformation. On the basis of that, interaction factors between two piles of different geometries can be computed in a homogeneous linear condition, and it was compared to the more rigorous integral equation method, concluding that settlement of pile foundation of adequate precision could be calculated by this method in most conditions.