CONCRETE PILE WITH DOUBLE STEEL PIPE, METHOD FOR MANUFACTURING THE SAME, MANUFACTURING DEVICE, PILE HEAD JOINT STRUCTURE AND JOINTED PILE STRUCTURE

摘要

To provide a concrete pile with double steel pipe which secures a sufficient bending bearing force even at the end, a method for manufacturing a concrete pile with double steel pipe having a sufficient bending bearing force, a manufacturing device, a pile head joint structure and a jointed pile structure.SOLUTION: A concrete pile with a double steel pipe includes: an outer steel pipe; a first end plate; a second end plate; a hollow cylindrical inner steel pipe arranged inside in a radial direction of the outer steel pipe, and a hollow cylindrical concrete part which is arranged in contact with the outer steel pipe between the outer steel pipe and the inner steel pipe, and is composed of concrete; and a filling part arranged between the concrete part and the inner steel pipe. The inner steel pipe is configured so as to burden a tensile axial force when a bending moment acts on the concrete pile with double steel pipe, at least the first end of the inner steel pipe is configured so as to burden a larger tensile axial force when the first end of the inner steel pipe and the first end plate are fillet-welded when the tensile axial force acts on the inner steel pipe.SELECTED DRAWING: Figure 1