摘要
对顶压桩采用双曲线荷载传递函数拟合自平衡试桩上段桩的荷载-位移曲线,采用指数荷载传递函数拟合自平衡试桩下段桩的荷载-位移曲线。对抗拔桩采用双曲线荷载传递函数拟合自平衡试桩的荷载-位移曲线。通过若干工程实测数据验证了基桩上下段分别采用两种曲线函数拟合,能较好地描述自平衡试桩的荷载传递特性。拟合结果对比表明,通过最小二乘法原理求解Q-s曲线方程,具有较高的精确度,应用Excel表格可快速处理多条实测曲线,方法简单、实用。
For bearing piles,the loading-settlement curve for upper pile segment with OPT （O-cell pile testing） were fitted by hyperbolic load transfer function, and the loading-settlement curve for lower pile segment with OPT were fitted with exponential load transfer function. For pulling piles, the loading-settlement curve for upper pile segment with OPT were fitted by hyperbolic load transfer function. The numerical solution verified by several history engineering cases can be used to describe the loading-settlement characteristic of OPT effectively. The comparison of fitting result shows that equation by the least square method to solve the Q-s curve has high accuracy degree, and application of Excel spreadsheet can quickly deal with the measured curves.
出处
《建筑结构》
CSCD
北大核心
2012年第8期111-113,共3页
Building Structure
关键词
自平衡试桩
荷载传递函数
曲线拟合
O-cell pile testing method
load transfer function
curve fitting
