| 摘要 |
PROBLEM TO BE SOLVED: To install an invert form and extremely easily release the form without lowering a construction quality. SOLUTION: The invert form 30 having a recessed form 24 collapsible inward, a releasable end plate 26 and side forms 28 formed integrally is moved by a moving carriage 20, and then, the recessed form 24, the end plate 26 and the side forms 28 are installed. Invert concrete is placed, cured and hardened, and then the end plate 26 is released. The recessed form 24 collapses inward to be released. The side forms 28 are released to place the invert concrete. COPYRIGHT: (C)2003,JPO
|
