| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of a pile, which can inexpensively and efficiently suppress the abrasion of a blade, and can push up excavated soil smoothly. SOLUTION: A steel tip shoe 2 with a conical cone part and the three blades 6 is attached to the tip of a pile body 1, so that the pile can be penetrated with rotation into ground. Leading-end-of-blade parts 6a, which are made gradually narrower in the direction of the penetration of the pile and whose angles with respect to the axial direction of the pile are smaller than that of the general part of the pile, are provided on the sides of the leading ends of the blades 6 which are welded to the outer peripheral surface of the tip shoe 2. When the pile is penetrated with the rotation while being made to bite into the ground from the parts 6a, the abrasion of the general parts of the blades 6 can be suppressed though the abrasion of the parts 6a is caused. By virtue of a shape such that the part 6a is made gradually narrower in the direction of the penetration, the resistance of the ground in the penetration with rotation can be reduced. Additionally, the provision of the parts 6a enables an increase in structural resistance. COPYRIGHT: (C)2004,JPO
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