| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of molding a concrete pile that can increase strength of a concrete pile itself.SOLUTION: A method comprises: forming a prepared hole 21 having a larger diameter than a cylindrical hole in soil or a concrete structure; setting a fixation plate 30 having a screw hole 31 formed at a prepared-hole bottom part; setting a cylindrical concrete form 32 having a smaller diameter than the fixation plate in the prepared hole; and installing concrete outside the concrete form; and removing the concrete form after the concrete is hardened so as to form the cylindrical hole 22. Further, the method comprises: inserting a PC steel rod or screw-knotted reinforcing bar into the hole and threadably engaging the reinforcing bar with a screw hole of the fixation plate; and threadably engaging a nut 41 with an upper part of the screw-knotted reinforcing bar across a stopper pressure plate 40 and screwing the nut to make tensile force acts on the screw-knotted reinforcing bar. Furthermore, the method comprises: installing concrete in the cylindrical hole in the state; and loosening the nut after the concrete 51 is hardened; and thus molding the concrete pile in which compressive force acts on the concrete having been solidified.SELECTED DRAWING: Figure 1 |
