灌注桩声波透射检测中声测管管距修正研究

A New Method for Amending the Time interval in Ultrasonic Test for Pile

对声波透射法检测混凝土桩的几种判据进行了比较，并针对声测管管距变化问题提出了声时拟合方法，该方法采用幂级数最小二乘法对声时深度曲线进行拟合，可修正管距引起的声时变化、计算混凝土声速及判断桩身缺陷位置．

In ultrasonic test for pile, the variety of embedded pile is always a problem for further analysis. In this paper, a new method for amending the time interval in ultrasonic test of pile is studied. This method is easy to be understood. The key of this method is to assume that the varying trend of time interval represents the trend of pipe. With this method, we can calculate the real ultrasonic velocity of concrete and easily locate the weak part of the pile.