| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hammering testing device for a structure, by which a hammering test regarding a tunnel wall can be performed with efficiency and with safety. SOLUTION: The hammering testing device 1 for a tunnel is provided with an inspection head 5, a head movement device 6 and a track land vehicle 7. The head 5 is provided with a plurality of hitting elements 39, which hit the face to be inspected 4 of a railroad tunnel 3 at a prescribed hitting force and at prescribed hitting intervals and a plurality of microphones 43 for hitting-sound collection, which collect the hitting sounds. The movement device 6 is provided with a swivel base 17. The head 5 is pressed against the face 4 by an air cylinder 25, for arm erection and collapse of an erection and collapse arm 18 and the air cylinder 36, for head-attitude control of a head support part 19, and it is moved by following undulations on the face 4. The movement device 6 is mounted on the vehicle 7. While the head 5 is made to follow the face 4, the track land vehicle 7 is moved at a prescribed speed, the hitting sounds are collected, and the state of the tunnel 3 is inspected.</p> |
