Gravity-Based Structure For Off-Shore Structures

A gravity-based structure to support off-shore structures, such as wind turbines and oil and gas platforms, is described. The gravity-based structure includes a submersible frame having a primary base body, an auxiliary base body spaced apart from the base body in parallel alignment therewith and a plurality of connecting members to interconnect the auxiliary body to the base body. One or more support towers is mounted on the base body, the one or more support towers being configured, in use, to support the off-shore structure. The gravity-based structure may be pre-assembled with an off-shore structure, and said assembly may be subsequently transported proximal to an off-shore installation site by a semi-submersible vessel, for example. The submersible frame of the assembly may then be progressively ballasted with water to cause the submersible frame to settle on a mudline of the off-shore installation site. - 10 16c 17 14c 16d 20 16a 16c 30 16c 14d 16b 12 14c 178 14a 14b 14c 30 Figure 1