DEVELOPMENT OF AUTOMATED IMPULSE ACOUSTIC SOUNDING SYSTEM FOR TUNNEL LINING

Abstract

Impulse acoustic method using by hummer is applied generally for sounding of tunnel lining in japan. Automated impulse acoustic sounding system for tunnel lining was developed. The system consist of hitting unit, supporting unit and acoustic analysis unit, and the system was set up on the vehicles. Some kinds of experiments for function of the system were carried on actual tunnels or sham test facilities. As the results, they were clarified the system was able to obtain reproducible data sufficiently and the system could find damaged lining area exactly.