Basic foundation pile and foundation pile construction method

摘要

PROBLEM TO BE SOLVED: To provide a foundation pile capable of improving workability which further increasing flexural and shear strength and heat exchange efficiency, and a foundation pile construction method.SOLUTION: In a foundation pile 1, a cage 3 having a first reinforcement 7a elongated in a vertical direction and a rib 8 for connecting a first reinforcement part a, and heat collection piping 6 are embedded in concrete 4. A sleeve 12 smaller in diameter than the rib is attached almost to the center of the rib 8 on the upside of the cage 3, and the heat collection piping 6 is inserted through the sleeve 12.