Application of Ground Penetrating Radar and High Density Seismic Mapping Method in Tunnel Concrete Lining Detection

If there are quality defects such as voids, non-compactness, insufficient lining thickness, and water-filled voids in the concrete structure, the bearing capacity and durability of the tunnel concrete lining structure will inevitably be affected. The non-destructive testing of tunnel concrete is a problem that the engineering community generally pays attention to, and it is the key to ensure the safe operation of tunnel concrete structures. Combined with engineering examples, the principle and method of using ground penetrating radar method and high-density seismic imaging method to detect internal defects of concrete are expounded, and the process of data processing is briefly introduced. The results are consistent, indicating the accuracy and feasibility of the ground penetrating radar method combined with the high-density seismic imaging method to detect the internal defects of tunnel concrete.