Penetration resistance reduction device, penetration structure of steel pipe pile, and construction method of steel pipe pile

摘要

PROBLEM TO BE SOLVED: To provide a solution, in which a simple structure is used to suppress blockage resistance of soil inside pipes and to reduce penetration resistance, enabling the improvement of workability and the miniaturization of devices required for driving piles.SOLUTION: A device to reduce penetration resistance in this invention is configured to be attached to a steel pipe pile 2 which is penetrated into the ground by a pile-driving unit and to reduce penetration resistance of the steel pipe pile 2, comprising: a vibration rod 3; a vibrator 4 to which the vibration rod 3 is connected extending downward; a splice plate 5 with which the vibrator 4 is detachably attached to the steel pipe pile 2; and a vibration-proof part 6 which is provided between the vibrator 4 and the splice plate 5. While the vibrator 4 is attached to the steel pipe pile 2, the vibration rod 3 is positioned in the inner side of the steel pipe pile 2.SELECTED DRAWING: Figure 1