| 摘要 |
PROBLEM TO BE SOLVED: To improve assembling workability of a form and save labor and facilitate adjustment of precision for a concrete body and further, increase safety. SOLUTION: An inner form 10 formed by setting four side frame bodies 14 to a square cylindrical shape is supported by a concrete body through form-support brackets 22 fitted to anchor bolts embedded in the concrete body placed in the precedent stage, and bracket-support anchor bolts of the subsequent stage are fitted. Then, concrete in this stage is placed and after curing, form-support brackets 22 of the subsequent stage are fitted. The upper part of the side frame body 14 of the inner form 10 is tilted inward to release it, and the inner form 10 is slid up to automatically erect the form-support bracket 22 of the subsequent stage and pass the inner form 10. Thereby the form-support bracket 22 is naturally set to fall and restored so as to make it supportable. Again, the inner form 10 is moved down and mounted on the form- support bracket 22 of the subsequent stage to adjust the inner form 10 and attach a face steel plate. Further, the outer side form is assembled and the inner and outer forms are fastened together and fixed by fixing hardwares provided with separators and anchor bolts are fitted. Thereafter, concrete is placed. The above processes are repeatedly carried out up to a specified height to construct a caisson.
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