用拟合桩顶速度响应的方法估计桩身形状

Shape Estimation of Piles by Matching Velocity Response of Pile Head

本文提出了一种基桩桩身形状识别方法。该方法将桩身划分为若干个单元，然后基于杆的一维波动方程，通过拟合桩顶瞬态激励速度响应信号识别出桩身参数及桩周土性参数。应用实例表明，本文方法能定量确定桩身缺陷的位置，延伸范围以及严重程度，是一种有效的基桩质量无损检测手段。

ased upon the stress wave propagation theory of a one dimensional rod,a method for shape estimation of piles is proPOsed in this peper. It is assumed that a pile consists of elastic columns with the samelength. The structural parameters of the pile-soil system are identified by matching the velocity response ofthe pile head. Practical examples have shown that this method can be used to determine the size,the typeand the location of defects in a Vile. It is an effective method for the pile quality detection.