| 摘要 |
PROBLEM TO BE SOLVED: To make the construction of a pier comprising steel pipe piles easier, more appropriate, and faster by reducing on-site work processes as much as possible.SOLUTION: The precast block comprises: a steel pipe 1 that can accept a pile head Pa of an existing steel pipe pile P of a pier B from the bottom; and a concrete head part 2, constructed outside the steel pipe 1, having a top surface 20 positioned above the top edge of the steel pipe 1, a bottom surface 21 positioned above the bottom edge of the steel pipe 1, and a side surface 22 between the top surface 20 and the bottom surface 21. The steel pipe 1 has: an injection part for pouring concrete 3 into a space formed between the steel pipe 1 and the steel pipe pile P after the steel pipe 1 accepts the steel pipe pile P, at a side portion of the steel pipe 1 below the bottom surface 21 of the head part 2; and a stopping part 11 for preventing the concrete 3 from leaking, at the bottom edge. |
