| 摘要 |
PURPOSE:To facilitate removal of a tension member, by a method wherein a hollow material for a tension member removing process is formed by a pressure resistant material, a sectional shape is formed into flat cross section, and the flat parts are aligned so that the directions of flat axes differe from each other through classification of the flat part toward the longitudinal direction. CONSTITUTION:A hollow material 1 is made of a pressure resistant material, the sectional shape thereof is formed into a flat cross section, and flat parts 1a, 1b, 1c... are arranged such that they are caused to differ in the direction of a flat axis through classification of them toward the direction of length. Tension members 2 are aligned around the hollow material 1 to bind them by means of a band 3. After such bound material is inserted into a bored, a curing material is injected and cured. Thereafter, after a curing material is broken by the inflation of the hollow material 1 through application of an oil pressure on the interior of the hollow material the tension members 2 are removed. |
