声波透射法桩基检测中声测管弯斜小波分析

为消除声测管弯斜对桩基检测结果准确性的影响,根据一维小波分析原理,在深入分析声波透射法测管弯斜时检测信号特点的基础上,运用一维小波分析原理通过计算机模拟得到了弯斜识别效果最优的小波函数。建立了声测管弯斜修正模型,利用修正模型对实际工程中某桥梁桩基声测管发生弯斜的检测数据予以修正,修正后的数据不仅能够消除声测管弯斜对检测数据的影响,且保留了检测信号中有用的高频信息,取得了较好的修正效果。

Wavelet Analysis for Bend of Pipes in Acoustic Penetrating Test of Pile Foundation

Being affected by the bend of pipes, it is difficult to obtain good original records in acoustic penetrating test of pile foundation. In order to eliminate the affection, based on one-dimensional wavelet analysis theory, analyzing the characteristic of the signal deriving from the bend pipe in acoustic penetrating test, the new modifying model is founded. By simulating on computer the most effective one in familiar thirty-seven kinds of wavelet functions to the model is obtained. The test signal deriving from a pile of a bridge is modified with this method. The result shows that the new method not only dispels the influence of bend pipe, but also holds the useful high frequency signal. This method reduces the happening of oversight and wrong test and shows a nice representation in engineering.