摘要
采用有效应力迭代算法来确定中性点的位置和计算下拉荷载值,并通过一个实例来说明迭代试算的过程。通过对试算结果与实测结果的对比,说明有效应力迭代算法是一种简单实用的方法,可用于指导桩基础的设计。有效应力法计算出的轴力与实测值在中性点以上也存在着差异,原因在于有效应力迭代算法所假定的单位面积上的负摩擦力与实际情况存在差异。
The effective stress iterative method of estimating neutral point and downdrag on a single pile was presented in this paper. A case was introduced to illustrate the trial-and-error procedure. By comparing the calculation result with the field measured value, effective stress iterative method is verified to be simple and practical and can be used in pile foundation design. Axial force of pile above the neutral point calculated by the presented method have differences from field measured value. The main cause lies in that the assumed negative skin friction is different from that of the field.
出处
《山东建筑大学学报》
2006年第5期401-405,441,共6页
Journal of Shandong Jianzhu University
关键词
有效应力迭代法
中性点
负摩擦力
下拉荷载
实测值
effective stress iterative method
neutral point
negative skin friction
downdrag
measured value
