Existing pile removal method and pile cutting device used to implement the method

摘要

PROBLEM TO BE SOLVED: To remove a large-sized pile of a long dimension, without using a large-sized crane.SOLUTION: An existing pile P is removed by repeatedly executing a process of pulling up by a whole peripheral rotary machine 2 until an upper end part projects above the whole peripheral rotary machine 2 on an existing pile P after cutting and a process of cutting and removing a part projected from the whole peripheral rotary machine 2, after successively executing a process of installing the whole peripheral rotary machine 2 capable of penetrating into the ground of a casing 1 and pulling up from underground on the ground G above the existing pile P, a process of dividing the ground of the existing pile periphery from its peripheral ground by penetrating the casing 1 into the periphery of the existing pile P by the whole peripheral rotary machine 2, a process of pulling up the existing pile P by the whole peripheral rotary machine 2 until the upper end part of the existing pile P projects above the whole peripheral rotary machine 2 by gripping the upper end part of the existing pile P by a gripping device 7 and a process of cutting and removing the part projected from the whole peripheral rotary machine 2 in a state of gripping the upper end part of the existing pile P by the gripping device 7.SELECTED DRAWING: Figure 1-2