连续小波变换在基桩完整性检测分析中的应用

基于一维连续小波变换的基桩完整性检测分析方法，通过对应力波信号进行多尺度一维连续小波分解，根据局部模极大值线（Local Maximum Line）判断信号的奇异点位置。然后根据奇异点位置确定入射波、缺陷反射波、桩底反射波位置。这种分析方法可以实现对反射波测试数据更为灵活精细的分析，消除了由实测信号直接判读反射波到达时刻存在的潜在误差。给出了实测桩端部响应信号的分析实例，说明将连续小波变换应用于基桩完整性检测是有效的。

Application of Continuous Wavelet Transform in Analysis of Pile Integrality

The analysis method for pile integrality based on 1-D continuous wavelet transform is to make a multi-scale continuous wavelet decomposition of the stress wave signal and determine the position of singular point according to local modular maximum line. Then, the positions of the incident wave, pile-toe reflection wave and flaw reflection wave can be determined by the position of singular point. Adopting the method can realize a more accurate analysis on the test data to reduce the potential error, which is caused by reading the original signal directly. The examples of analyses of of the tested piles indicate that the application of continuous wavelet transform in pile integrality test is effective.