| 摘要 |
PROBLEM TO BE SOLVED: To easily and shortly assemble precast plates for a tunnel.SOLUTION: On a frame 2 in a shaft Ha outside a tunnel Hb, minimum units of precast plates 5 are assembled with parts 5a of the precast plates 5. Then, the frame 2 is made to travel along on a rail 1 to an installation position in the tunnel Hb and the precast plates 5 on the frame 2 are installed in the tunnel Hb. Such work is performed in order from the inside corner of the tunnel Hb to the outside. The precast plates 5 are assembled outside the tunnel Hb, therefore improving the assembling accuracy of the precast plates 5. Workability is good in assembling work for the precast plates 5, resulting in a shorter construction period for the precast plates 5. |
