| 摘要 |
PROBLEM TO BE SOLVED: To provide structure and a joining method for a steel pipe for a steel pipe pile having small penetration resistance when driving the pile and having large joining strength to facilitate connecting construction at a site. SOLUTION: The joining structure has outer joint pipes 10a, 10b having outer diameters almost equal to the outer diameters of the steel pipes 1, 2, provided at their inner peripheral surfaces stepwise with annular rugged parts 11a, 11b reduced in inner diameter toward the tip parts, and joined to the end parts of the steel pipes 1, 2 respectively; and a plurality of circular arc members 20 disposed over the inner peripheral surfaces of the outer joint pipes 10a, 10b when the tip parts of both outer joint pipes abut each other, and provided at their outer peripheral surfaces with rugged parts 21 having large diameters at the axial center parts corresponding to the rugged parts 11a, 11b of the outer joint pipes 10a, 10b and reduced in diameter toward both end parts. The circular arc members 20 are disposed at the inner peripheral parts of the outer joint pipes 10a, 10b so that the rugged parts 11a, 11b, 21 are fitted to each other to connect both, thus joining two steel pipes 1, 2. COPYRIGHT: (C)2004,JPO&NCIPI
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