| 摘要 |
PROBLEM TO BE SOLVED: To provide an anchoring structure for a pile head anchor bars having a high reliability capable of smoothly transmitting a pulling force from the superstructure to which the pile head anchor bars can be easily attached. SOLUTION: An anchor bar fixing hole 3 widened downward is provided in advance to the pile head end plate 2. By a heating apparatus utilizing electromagnetic induction, the bottom end of the pile head anchor bar 11 is heated to a high temperature. Heated end portion of the anchor bar 11 is inserted to a fixing hole 3, and a pushing force is applied as it is. The end of the heated anchor bar 11 is flowed and deformed inside the fixing hole 3, and an enlarged diameter portion 12 is formed. Since the enlarged diameter portion 12 is linked to the fixing hole 3, pull-out of the anchor bar 11 can be prevented and, as a pile head anchor bar 11, a smooth stress transmission can be realized between the pile foundation and the superstructure.
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