| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a member for being driven into ground, which can obtain an end bearing capacity while reducing driving resistance and preventing a reduction in pull-out resistance.SOLUTION: In a steel pipe pile 1 according to the present invention, a plurality of small-diameter pipes 5 are attached in an axial direction of a steel pipe 3 to an outer peripheral surface away by a predetermined distance upward from a tip of the steel pipe 3. The small-diameter pipes 5 are equally attached in the circumferential direction of the steel pipe 3. Both upper and lower ends of the small-diameter pipe 5 are opened, and the lower end thereof is formed as a lower inclined surface 5a directed obliquely upward from the side of the steel pipe 3.</p> |
