| 摘要 |
PROBLEM TO BE SOLVED: To prevent opening in a pull box from being buried in a concrete skeleton from the boundary of the concrete skeleton. SOLUTION: A form 3 is placed in front of an opening in a pull box 2 for cable installation, and then concrete is fed. After the concrete is hardened, the form 3 is removed, and thus the pull box 2 is fixed in the concrete skeleton 1. In the method, bolts 7 are installed on the outer face around the opening 2a in the pull box 2 in such a manner that the bolts 7 penetrate the form 3, and the pull box 2 is supported by means of the bolts 7. The bolts 7 are tightened from outside the form 3 using nuts 8, and the form 3 is brought into tight contact with, and firmly secured on, the front face of the opening 2a. Thereafter, concrete is fed. |
