| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide the weldless pipe joint employing expansive mortar, which facilitates works for a steel pipe joint, is excellent in execution efficiency, is reliable in water cut-off properties, and is furthermore high in joint strength. SOLUTION: This invention is concerned with the weldless steel pipe joint employing mortar where a cut-off member 3 is provided for the end parts of steel pipes 1 and 1 which are mutually adjacent with their pipe ends faced to each other, the steel pipes 1 and 1 are covered by a cylindrical outer pipe 2 which covers the outer circumferences of the joint parts of the steel pipes 1 and 1, is provided with flange parts 4 at both the inner sides of it, an air vent hole 5 at its upper part, and with an injection hole 6 at its lower part, and can be divided in the circumferential direction, cut-off members 7 are interposed between each flange part 4 and the outer pipe 2, and expansive mortar 10 which is so blended that expansive pressure is developed as specified, is filled in the inside of a joint space 9 formed between the outer pipe 2 and each steel pipe 1 and 1. Besides, the aforesaid joint also represents the weldless steel pipe joint employing expansive mortar, in which ribs are welded over the outer circumferences of the steel pipes 1 and 1 in the inside of the joint space 9.</p> |
