| 摘要 |
PROBLEM TO BE SOLVED: To provide a foundation pile construction method for constructing a foundation pile having a steel frame reinforcing expanded portion having a diameter larger than a pile diameter at a lower end or an intermediate portion of the pile, with good working efficiency. SOLUTION: According to the foundation pile construction method, the steel frame reinforcing expanded portion having the diameter larger than the pile diameter is formed at the bottom portion or/and the intermediate portion of the pile. Specifically a cylindrical steel frame reinforcing body 10 having a structure that is expandable by a compressive force applied thereto in the vertical direction, is fixed to the lower end or/and the intermediate portion of the existing pile. Then the steel frame reinforcing body 10 is expanded at a predetermined depth in the ground, and at the same time the steel frame reinforcing body is rotated to excavate the ground at the expanded portion. After the excavation, the steel frame reinforcing body is left as it is as a reinforcing material of the expanded portion. COPYRIGHT: (C)2005,JPO&NCIPI
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