一种用测桩顶响应识别桩身形状的方法

A Method for Shape Estimation or piles by Using of Measured Impulse Response Date of Pile Head

本文提出了一种用实测桩顶瞬态激励响应信号识别桩身形状的方法。该方法将桩划分为若干个单元，然后基于一维波动方程，从桩顶脉冲响应识别出单元界面反射系数，进而识别出桩身形状。数值模拟算例表明，本文方法准确可靠，是一种有效的基桩桩身质量检测手段。

ased upon the stress wave propagation theory of one dimentional rod, a method for shape estimation of piles by using of measured impulse response data of a pile head is proposed in this paper. It is assumed that a pile consists of successive connections of elastic columns with the same length. The reflection cofficient of every connecting plane between the columns is identified using impulse response data of the pile head. The cross-sectional area of every column is computed from the reflection coefficients, and the shape of the pile is estimated. The numerical example has shown that this method is accurate and reliable. It can be used for the pile quality detection effectively.