| 摘要 |
PROBLEM TO BE SOLVED: To form a reinforced concrete pile in the soil of the weak ground in the accurate and uniform state of covering thickness of placed concrete and a reinforcing skeleton. SOLUTION: A concrete filling pipe 1 formed by connecting a bit 30 provided with a vibrator 33, to the lower part of a lot 10 of a hollow pipe provided with a small diameter pipe 17 inside is sunk into the weak ground by the vibration of the vibrator 33. The reinforcing skeleton 40 is inserted in the small diameter pipe 17 in the sunk concrete filling pipe 1 to place concrete from the lower part of the concrete filling pipe 1 through a concrete filling hose 13, and the concrete filling pipe 1 is pulled out leaving the reinforcing skeleton 40 while continuously vibrating by the vibrator 33.
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