Abstract
An accurate description of urban underground pipelines can effectively avoid blind construction and damage to underground pipelines during urban planning, design, construction, and management. Full waveform inversion could reconstruct the underground velocity structures with high resolution and has been widely used in urban engineering geophysical prospecting. The pseudo-spectral method combines the efficiency and accuracy of seismic forward modeling. Using the pseudo-spectral method for full waveform inversion can effectively improve this method’s detection accuracy for urban pipelines. In this paper, we test the pseudo-spectral full waveform inversion method in underground pipeline detection. The synthetic test shows that compared with conventional full wave inversion, the pseudo-spectral method is easier to converge and has higher accuracy. The method has great potential to be used to detect the urban underground pipelines.
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