Comprehensive advanced detection method of tunnel base on high-resolution signal vibroseis seismic and 3D laser scanning technology

To address the issues of insufficient seismic source energy and low prediction accuracy caused by the superposition of effective reflected signals in traditional geological advance forecasting, a high-resolution data processing method for vibroseis data has been proposed. By integrating high-resolution vibroseis technology with three-dimensional laser scanning, a high-fidelity geological advance prediction combining multimodal and long-short distance approaches has been achieved and applied to the Dangshun Tunnel. The research results demonstrate that the proposed synchrosqueezed wavelet transform correlation operation effectively resolves wavefield superposition issues and enhances the resolution of seismic records. Additionally, the joint multimodal inversion interpretation eliminates the limitations of single-method approaches, reliably restores the properties of anomalous geological bodies, and enables accurate prediction of target structures. The joint prediction results are basically consistent with excavation verification. Multi domain and multi-level detection methods are feasible in tunnel geological advance prediction. Conducting dynamic joint advance prediction is very important for improving the accuracy of prediction.