| 摘要 |
<p>The invention relates to a method for building an offshore platform having pressure-loadable legs (8), by preference also allowing jacking up above the sea surface while the substructure (3, 3', 3, 3a', 8) is resting on the seabed. In order to be able to build a part platform structure ready in dock (2) and avoid casting of platform legs at large depth in a fjord, the deck frame (6) is built on top of a bottom section (3, 3', 3, 3a') and connected to this through jointable platform leg sections (8) having a length corresponding to a fraction of intended leg length, this part platform structure being towed in a floating condition to a field position, where further leg sections (8) are jointed to form legs of sufficient length for allowing the bottom section (3, 3', 3, 3a') to be anchored to the seabed, the substructure of the platform structure resting on the same. Also, the invention relates to an offshore platform structure having pressure-loadable legs (8), comprising a bottom section, e.g. in the form of a plurality of storage tanks (3, 3', 3, 3a'), and a deck (6) preferably adapted to be jacked up, wherein the platform legs consist of jointable, longitudinal sections (8), and that the deck (6) is formed with vertically through-going, channel-forming sleeves (7), which are formed for the passage of the platform leg sections (8) from above/downwardly, i.a. upon jointing to underlying leg sections (8), and wherein the latter can be attached to the deck.</p> |
