The invention discloses an
underwater buoyancy tank separation structure and
separation method suitable for a hexagonal
barrel type foundation overwater prefabricated platform. The
underwater buoyancy tank separation structure comprises a main body platform, the four corners of the main body platform are respectively provided with a permanent dry cabin, the lower parts of separation type
buoyancy tanks are provided with a clamping rack, the lower part of the clamping rack is provided with a group of rollers, the permanent dry cabin is provided with a buckle matched with the clamping rack at a position corresponding to the clamping rack, and an
air cushion is also arranged between the permanent dry cabin and a separation type buoyancy tank. According to the
underwater buoyancy tank separation structure and
separation method suitable for the hexagonal
barrel type foundation overwater prefabricated platform, the mode that the separation type buoyancy tanks are transferred from the platform is adopted, the use space of the platform can be fully utilized, the construction cost of the platform is saved, meanwhile, the risk of transferring a
barrel type foundation is reduced, the operation that two floating body structures of a floating ship and the hexagonal barrel type foundation are connected in the floating state in water is avoided, and foundation transferring is more efficient and
safer. Meanwhile, auxiliary devices for transferring the hexagonal cylindrical type foundation are reduced, so that the foundation transferring operation is more convenient, and the cost is lower. In addition, a separation type buoyancy tank device is simple in structure and can be repeatedly used.