| 摘要 |
PROBLEM TO BE SOLVED: To provide a supporting structure of a foundation pile capable of ensuring the effective load transfer to a foot protection section from a pile body and to the bearing ground to exhibit high bearing power and having the excellence in workability at a low cost and a steel pipe pile. SOLUTION: The supporting structure of the foundation pile is constituted of the steel pipe pile having a circular or a spiral projection 2 on the outer circumference of the front end section and the foot protection section 11 formed in a bearing layer in the ground or an area including the bearing layer, and it fulfills the following conditions. [p/h=8 to 15], [H≤S1+S2], [Dp×2≥Dg≥Dp+2×h]. Here, p is the pitch of the projection 2, H is the overall height of the foot protection section 11, Dp is the external diameter of the steel pipe pile 1, and Dg is the external diameter of the foot protection section 11. S1 is the anchorage length of the circumferential projection, S2 is the distance from the front end of the steel pipe pile to the bottom of the foot protection section, and it fulfills the following conditions. [1.75×Dg-2.45×Dp≤S1≤1.75×Dg-1.75×Dp], and [Dp×2≥S2≥(Dg-Dp)/(2×tanβ)]. COPYRIGHT: (C)2007,JPO&INPIT
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