| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an erection bar allowing two upper and lower stages of enlarged diameter part bars and shear-reinforcing bars to be easily arranged at the enlarged diameter part of a bottom part of a pile hole. Ž<P>SOLUTION: The erection bar 1 is constituted by mounting the upper stage side enlarged diameter part bar 31 and lower stage side enlarged diameter part bar 32 turnably to a narrow diameter part bar 2, mounting the shear-reinforcing bars 33 turnably between the upper stage side enlarged diameter part bar 31 and the lower stage side enlarged diameter part bar 32, and connecting a sliding member 4 to an anchor part 31a of the upper stage side enlarged diameter part bar 31 through connecting members 5. When the erection bar 1 is lifted, the upper stage side enlarged diameter part bar 31 and the lower stage side enlarged diameter part bar 32 are turned upward by the load of the sliding member 4. When the erection bar 1 is arranged in the pipe hole H, the upper stage side enlarged diameter part bar 31 and the lower stage side enlarged diameter part bar 32 are horizontally arranged at an enlarged diameter part Hb of the pipe hole H, and the shear-reinforcing bars 33 are arranged at predetermined spaces between the upper stage side enlarged diameter part bar 31 and the lower stage side enlarged diameter part bar 32. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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