| 摘要 |
PROBLEM TO BE SOLVED: To improve the workability of a winged steel pipe pile and reduce cost. SOLUTION: A substantially roll of spiral blade 2 of one turn is formed in a doughnut shape with a large diameter and a wide width extending over the internal blade 2b protruding from the external blade 2a largely protruding to the outside of the pile body 1 to the inside of the pile body 1 and is provided at the lower end of the pile body 1. An extension pipe 3 having the same diameter with the pile body 1 forming a part of the pile body 1 is connected to the lower side of the spiral blade 2 and a cutting edge 6 is protruded at the lower end of the extension pipe 3. The spiral blade 2 of the steel pipe pile with the blade is screwed in the ground by rotary press-in. COPYRIGHT: (C)2004,JPO&NCIPI
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