| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite pile of a steel pipe pile and a soil cement column. SOLUTION: A plurality of stirring wings 2 are projected to the circumference of the lower end of a composite pile, a hollow steel pipe as a pile core having one or more discharge ports 4 is used as a channel, successively adding the hollow steel pipe while pouring grout to rotationally bury, and it is formed in a state of soil cement by solidifying the grout inside and outside of the hollow steel pipe.
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