PILE CONSTRUCTION METHOD, PILE CONSTRUCTION DEVICE, AND PILE FOR GROUND CONSTRUCTION

摘要

PROBLEM TO BE SOLVED: To achieve desired supporting force and pulling resistant force and to carry out work ranging from excavation in the ground to formation of an expanded body (anchor) in a pile by a single process.SOLUTION: In a method for constructing a pile 10, which has a bag body 11 expandable outward beyond the outer circumferential face 10a of the pile 10, in ground G: the pile 10 is turned so that propulsion force into the ground is caused by a spiral blade 12 formed in the outer circumferential face 10a of the pile 10 to advance the pile 10, and a predetermined place in the ground G is agitated by using the spiral blade 12. The bag body 11 of the pile 10 is positioned in the agitated place, a fluid is introduced into the bag body 11 to expand the bag body 11, and an expanded body 11' is formed by solidifying the fluid. Preferably, rotation of the pipe 10 is continued while suppressing advance of the pile 10 for agitating the predetermined place in the ground G.