Construction method of concrete filled double steel pipe column and concrete filled double steel pipe column

摘要

PROBLEM TO BE SOLVED: To provide a concrete-infilled double steel pipe column with excellent strength and rigidity, which enables concrete to be solidly placed in an outer shell steel pipe by using an internal steel pipe with an opening.SOLUTION: A concrete-infilled double steel pipe column 1, which includes an outer shell steel pipe 10 and an internal steel pipe 20, is filled with concrete 30. In the internal steel pipe 20, a plurality of openings 27 are spirally arranged in a height direction on an outer peripheral surface. On the outer peripheral surface of the internal steel pipe 20, radial position fixing members 60, 70 and 80 are provided on a lower end side, in an intermediate part, and on an upper end side, respectively. The concrete 30 is infilled into the inside and outside of the outer shell steel pipe 10 and the internal steel pipe 20 through the openings 27.SELECTED DRAWING: Figure 1