| 摘要 |
A gravity platform for a great water depth, wherein the platform in operational condition is intended to stand stably on the sea bed (3) essentially by its own weight and in this position is intended to project above the water surface (4) for support of the deck structure (5). The platform comprises a lower part in the form of a base (6, 7) and a caisson structure (1) of concrete, and an upper part in the form of a framework structure (2). In order to take into account natural circumstances and conditions in an optimal manner, i.e. existing limitations in available towing draft out from sheltered coastal area to the site of installation, the framework structure (2) as well as the caisson structure has a height of at least 100 meters, and the monolithic caisson structure (1) has such a great height in relation to the framework structure (2) that the centre of gravity of the platform is located substantially below its centre of buoyancy in a floating position during towing-out at a depth which is essentially equal to or greater than the height of the caisson structure (1). Thus, the platform is floating-stable at the depth in question without any external means. |
