| 摘要 |
PURPOSE:To prevent occurrence of metallic fatigue in PC cables at crooked parts and to check decrease of fatigue strength by covering each bundle of bending PC cables at a crooked part with mantle tubes made of resin that are applied over a range of the crooked part. CONSTITUTION:A crooked guide sleeve 3 is composed of a curved part 31, formed in a locus of a certain radius (r), and straight-lined parts 32 extending from the opposite ends of the curved part. PC cables 2 are covered with mantle tubes 4 that are stretching over the curved part 31 of the crooked guide sleeve 3. The mantle tubes 4 are interposed between the adjoining PC cables 2 as well as between the PC cables 2 and the interior face of the crooked guide sleeve 3 so that these members may not contact directly one another. Thereby decrease of fatigue strength at the crooked part can be prevented. |
