| 摘要 |
PURPOSE:To decrease a construction cost, by a method wherein arrangement of bar, in which the upper part of a pile main arrangement of bar forms a PC steel bar constituted in an unbond and the lower part forms a steel bar for reinforced concrete, is installed in an excavated hole, and after concrete is placed therein, the PC steel bar is stretched. CONSTITUTION:The whole of pile arrangement of bar forms a connection main arrangement of bar 4 in which a given upper section L, on which high bending moment is exerted, forms a PC steel bar 1, and a lower section l forms a steel bar 3 for reinforced concrete connected to the PC steel bar 1 by means of a coupler 2. An anchoring metal 5 is attached to the lower end or the connection of the connection main arrangement of bar 4, and arrangement of bar in which the whole surface of the PC steel bar 1 is formed in an unbond 6, is installed in an excavated hole 7. Thereafter, after concrete 14 is placed and cured, given tension is exerted on the PC steel bar 1 from the top of a pile, and the PC steel bar 1 is anchored at 8 to the top part of the pile to exert prestress on concrete 14 at the upper section L. |
