To provide a joint structure of a steel pipe pile, which enables the upper and lower steel pipe piles to be connected together by simple work on a job site and which enables the high-accuracy and high-reliability connection of the steel pipe piles by making working of a joint part simply performed by a steel working manufacturer and the like, and the steel pipe pile with a joint.
A diameter-enlarged sleeve part 1a is provided at an end of one steel pipe pile 1A of two steel pipe piles 1 (1A and 1B) to be connected to each other, which are equal in diameter to each other, and an end 1b of the other steel pipe pile 1B is fitted into the sleeve part 1a. The sleeve part 1a has a diameter enlarged by applying axial compressive force while heating an end of a round steel pipe, which serves as a material for the one steel pipe pile 1A, by high-frequency induction heating.
FUKUDA AKIRA
TSUBOI MITSUO
Shuji Sugimoto