| 摘要 |
PROBLEM TO BE SOLVED: To provide an economical rotary penetration pile capable of resisting bending moment transmitted from a blade and unlowered in supporting performance. SOLUTION: A pile tip member 3 with an outer diameter D having a plurality of blades 2 circumferentially dividing the outer periphery of the pile is mounted to the tip part of a general pile part 1. The pile tip member 3 is formed to be thicker in wall thickness than the general pile part 1 or formed of a high strength material to resist bending moment generated by the force applied to the blade 2. In the mounting part of one blade 2, a position where stress generated to the pile tip member 3 is maximum is made a reference position 4, and a length L<SB>1</SB>from the reference position 4 to the rear end of the pile tip member 3 is made 0.1 D to 0.5 D. COPYRIGHT: (C)2004,JPO&NCIPI
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