Floating platform device for a wind turbine tower and assembly method

A device for the support and foundation of a wind turbine tower, the device comprising:

• a main body made at least partially of concrete, wherein the main body is
• configured to provide a hydrostatic buoyancy force greater than the weight of the main body;
• a transition part attached to the main body, the transition part comprising a housing for installing a wind turbine tower;
• a plurality of installation elements located on the main body, with each installation element comprising a through hole;
• the device being characterized in that
• the main body has a prismatic shape, and the transition part also has a prismatic shape, with the axis of the prism of the main body coinciding with the axis of the prism of the transition part;
• the main body comprises a first polygonal-shaped base, a second polygonal-shaped base parallel to the first base, a side wall joining the first base and the second base, defining an inner volume comprised between the first base, the second base and the side wall, and a plurality of ribs comprised in the inner volume, with each rib being in contact with at least one of the bases;
• the prism of the main body has beveled vertexes, where the installation elements project from the bevels.