| 摘要 |
PROBLEM TO BE SOLVED: To provide a hollow precast pile which allows a curable material to be efficiently removed when steel materials such as reinforcement bars in the pile are exposed by chipping for the formation of a space for bar arrangement and concrete placing for construction of a pile supporting structure such as a footing at a pile head without obstruction to the chipping work, so that the space for bar arrangement and fill concrete placing for construction of the pile supporting structure can be formed at the pile head.SOLUTION: A hollow precast pile 14 includes an auxiliary tool 1 for forming a pile head space having a cylindrical body 2 provided with a pullout metal fitting 4 supported with a supporting rod 5 at the upper end and a long-sized steel material 3, in the hollow part 13 of the precast pile at the column head 9 of the hollow precast pile 14 having reinforcement bars 11 in the pile and a PC steel 20. The auxiliary tool 1 is suspended at a predetermined position with the long-sized steel material 3 such that the outer peripheral surface of the cylindrical body 2 comes in contact with the inner peripheral surface of the hollow precast pile 14. |
