| 摘要 |
PROBLEM TO BE SOLVED: To highly precisely and firmly install a structural stud even when an eccentricity or the like occurs on a precast pile, and execute the structural stud and shorten an execution period regardless of the hardening state of the precast pile. SOLUTION: An upper pile 2 having a hollow part 3 fixing an end face plate 28 on a lower end is joined to a lower pile 30 to be sunk (a), and a casing 7 is inserted into the upper end part 6 of the hole wall of an excavation hole 5 (b). Cement milk (strength 50-300 kg/cm2) 13 is injected and filled into the hollow part 3 and the upward excavation hole 5 of the upper pile 2 (b). A positioning jig 15 is installed and fixed on the casing 7 (c). A structural stud 20 with a temporary fixing material 23 fixed is lowered, the lower end of the stud 20 is sunk in the cement milk 13 in the hollow part 3, and the temporary fixing material 23 is fixed to the positioning jig 15 (d). After the cement milk is solidified, the temporary fixing material 23, the casing 7 or the like is removed to construct the structural stud 20 (e).
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