Engineering application of acoustic wave method in leakage detection of directly buried heating pipeline

In this paper, the acoustic wave method is used to measure the leakage of two sections of directly buried heating pipelines in the city by trenchless engineering. The characteristics of the leakage acoustic wave signal under different engineering conditions are analysed, and the acoustic wave vibration signal is denoised by Fourier filter. The research shows that Fourier filter can effectively improve the accuracy of leakage location, and the measured leakage location error is less than 2%. The acoustic wave method based on Fourier filter denoising has good engineering application value.