| 摘要 |
PROBLEM TO BE SOLVED: To provide a foundation pile which is excellent in workability, economy and pile performance, and which prevents or minimizes the production of excavated surplus soil to be disposed of in the whole foundation pile, by effectively utilizing characteristics of both a steel pipe pile to be constructed as a non-earth-removal pile and a cast-in-place pile to be constructed in the lower part of the steel pipe pile, and a manufacturing method for the foundation pile. SOLUTION: A steel pipe 1 penetrates ground up to a prescribed depth without earth removal in a state wherein a lower end is closed with a closing member such as a rotary head 2. The rotary head 2 at the tip of the steel pipe 1 is removed, and recovered through the inside of the steel pipe 1. When lower ground is excavated through the inside of the steel pipe 1 whose end is opened, and concrete 7 is placed by inserting a cage 5 into a pile hole 4, so that the cast-in-place pile can be constructed below the steel pipe pile. The excavated surplus soil in the excavation of the pile hole 4 is infilled into the upper steel pipe 1 in an as-is state or the state of being stabilized by means of cement etc. COPYRIGHT: (C)2005,JPO&NCIPI
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