Application of Long-Range Cross-Hole Acoustic Wave Detection Technology in Geotechnical Engineering Detection: Case Studies of Tunnel-Surrounding Rock, Foundation and Subgrade

The adverse geological conditions of soil cave, karst cave and goaf in deep foundation directly affect the safety economy geotechnical engineering construction. It is a difficult problem detection to detect distribution bad efficiently accurately. Aiming at problems short penetrating distance low resolution cross-hole acoustic wave rock-soil mass, based on characteristics propagation rock layers comprehensively utilizing spark source data acquisition device, long-distance technology proposed. According indoor concrete model test field tests engineering, applicability structure phenomena under complex verified. results show that CT imaging can accurately cavities test. In addition, grouting effect tunnel-surrounding rock, high-rise building subgrade further verify rapidity, accuracy intuitiveness technology. This work provides reference for eliminating potential caused by similar investigation.