To address the challenge of long-duration data collection difficulty in urban geophysical exploration resulted from regulatory restrictions on exploration sites,the authors utilize ultra-short-duration passive source noise data.By employing the phase-weighted stacking of cross-correlation functions,dispersion curves are extracted.The fundamental mode dispersion curves are then inverted to obtain a one-dimensional S-wave velocity profile.Utilizing this profile as an initial model,a second-stage inversion is conducted,which reveals the presence of underground cavities.The results of this study demonstrate the feasibility of using ultra-short-duration passive source surface-wave imaging for cavity detection.
维普
万方数据