| 摘要 |
PROBLEM TO BE SOLVED: To provide a mechanism that prevents a tile panel from immediately falling and scattering, even when a tile panel support structure is damaged.SOLUTION: A wire rope 6 elongated in the state of being fitted to a joint 2t of a tile panel 2 is inserted in such a manner as to penetrate to a back side or a front side in a joint crossing part 2k. Ends 6e of opened or closed loops 7A and 7B relaxing tension on the back side of a base plate formed by being folded back at the crossing part 2k in a joint of another row in a part below the wire rope 6 are tied up by a hanger 8 fixed to a tunnel wall 1. |
