| 摘要 |
On each longitudinal joint of the stiffener there is an internal and an external brake separated by a flange of thickness T. The stiffener is placed on the main face of the rectangular plate. Inside each longitudinal joint there is at least one welding pass to form an internal welding band with a connecting radius R greater than or equal to 4mm. - Method of assembling a column (1, 2) for the rack of a jack-up oil platform, comprising at least one rectangular plate (3, 3') with teeth (41, 51) on its longitudinal side faces (4, 5) and at least one stiffener (8, 8', 9, 9', 10, 10') in the form of a half- shell welded to a main face (6, 7) of the rectangular plate(s) along the longitudinal joint (11, 12) of the leg. The brakes on the outside of each longitudinal joint are filled with an external welding band made in one or more passes with metal deposit. The welding on the inside of each longitudinal joint is a metal depositing weld. After making the internal welding band and before filling the brake with weld, the internal welding band is controlled and if necessary defects are removed and repaired. The thickness T of the flange is less than the sum of the penetration depth of the internal welding bead , the penetration depth of the first pass of the external weld and the grinding thickness at a defect. The internal welding band is made using submerged arc, MIG, MAG, TIG or coated electrode welding. The external weld is made using submerged arc. At least one stiffener is a connecting piece between two stiffeners for two adjacent rectangular plates. - Independent claims are made for the column containing a rack for a jack-up oil platform manufactured as described above, and for a device to carry out the process described, with a welding head mounted to articulate on a movable trolley. |
