自平衡法试验上段桩荷载-位移曲线的解析拟合算法

上海交通大学学报（自然版） ›› 2011, Vol. 45 ›› Issue (10): 1498-1503.

自平衡法试验上段桩荷载-位移曲线的解析拟合算法

奚笑舟,陈龙珠

（上海交通大学安全与防灾工程研究所，上海 200240）

收稿日期:2010-10-27 出版日期:2011-10-31 发布日期:2011-10-31

Analytical Fitting Method of Loading-Displacement Curve for Upper PileSegment under O-Cell Pile Testing

XI Xiao-Zhou, CHEN Long-Zhu

(Institute of Engineering Safety and Disaster Prevention, Shanghai Jiaotong University,Shanghai 200240, China)

Received:2010-10-27 Online:2011-10-31 Published:2011-10-31

摘要/Abstract

摘要： 针对自平衡法试验数据的分析处理，假定桩侧土荷载传递函数符合三折线模型，考虑桩身重力作用的影响，推导出上段桩荷载-位移曲线的解析算式，并给出了由自平衡法试验数据确定桩土参数的方法.通过2根桩的实测数据初步验证了文中解法的适用性，为由自平衡法试验数据推算桩侧摩阻力和桩身参数、常规顶压桩的荷载-位移曲线提供了一种理论手段.

关键词: 基桩静载试验, 荷载-位移曲线, 解析算法

Abstract: A set of analytical equations of the loadingdisplacement curve of upper pile segment for the O-cell pile testing (OPT) method were established by using load transfer method. The lateral soil of pile shaft was simulated with a tri-linear load-transfer function and the gravity of pile shaft was taken into account. Also, the method to determine parameters for the pile-soil system with OPT data was mentioned. The theoretical results were compared with engineering cases from literatures. The method could be used as a theory guide to determine the frictional force at the pile-soil interface and furthermore to obtain the loading-displacement curve of traditional loading test with OPT data.

Key words: static load testing, loading-displacement curve, analytical algorithm

中图分类号:

TU473.1

奚笑舟, 陈龙珠. 自平衡法试验上段桩荷载-位移曲线的解析拟合算法[J]. 上海交通大学学报（自然版）, 2011, 45(10): 1498-1503.

XI Xiao-Zhou, CHEN Long-Zhu. Analytical Fitting Method of Loading-Displacement Curve for Upper PileSegment under O-Cell Pile Testing[J]. Journal of Shanghai Jiaotong University, 2011, 45(10): 1498-1503.

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