JOINT STRUCTURE OF STEEL PIPE PILE FOR PREVENTING LANDSLIDE, AND STEEL PIPE PILE FOR PREVENTING LANDSLIDE EQUIPPED WITH THE SAME
PROBLEM TO BE SOLVED: To provide a joint structure of a steel pipe pile for preventing landslide, and the steel pipe pile for preventing landslide equipped with the joint structure of high reliability with a small amount of rotational movement in joining and high joint strength with no possibility o...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a joint structure of a steel pipe pile for preventing landslide, and the steel pipe pile for preventing landslide equipped with the joint structure of high reliability with a small amount of rotational movement in joining and high joint strength with no possibility of thread ridges biting each other. SOLUTION: The joint structure has an internal thread joint part 11 provided at the end of a steel pipe pile body 1, and an external thread joint part 21 provided at the end of a steel pipe pile body 2 and screwed into the internal thread joint part 11. The outer diameters of the internal thread joint part 11 and external thread joint part 21 are formed to be practically the same as the outer diameters of the steel pipe pile bodies 1, 2. The thread parts of the internal thread joint part 11 and external thread joint part 21 are formed of tapered threads with the number of threads of 3 to 6 with inclination, thread ridge height and thread ridge spacing set to complete screwing within one rotation. The product of section modulus and material strength at screw terminal point parts of the internal thread joint part 11 and external thread joint part 21 is larger than the product of section modulus and material strength of the steel pipe pile bodies 1, 2, and the product of thread ridge height and the number of threads is larger than cross-sectional areas at the thread terminal point parts of the internal thread joint part 11 and external thread joint part 21. COPYRIGHT: (C)2007,JPO&INPIT |
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