| 摘要 |
PURPOSE:To reduce load to be applied to the bottom of a dock by minimizing the number of blocks and raising the assembling efficiency of a working platform by a method in which a footing is provided for the working platform which is supported by means of the buoyance of the footing. CONSTITUTION:A working platform body 1 is supported by blocks 3 in a dock A, and three first unit legs 5-1 with footings 4 are loose-jointed with the lower end of the working platform body 1. Then, the second unit legs 5-2 of the same form are hung down by a crane 6 and joined with the upside of the first unit legs 5-1, a sand support layer 8 is provided between the footings 4 and the bottom of the dock A, the working platform body 1 is jacked up by an elevator 2, all the weight of the working platform 1 is supported on the support layer 8, and then blocks 3 are removed. Then, water is charged in the dock A, and the working platform 1 is wholly floated, moved, and turned. Then, the footings 4 are landed on the support layer 8 in such a way that slight load is applied to the bottom, and the third unit legs are orderly joined with the upside of the unit legs 5-1 and 5-2. |
