Patent ID: 11920559
Assignee: FHECOR INGENIEROS Y CONSULTORES S.A.
Field: Transport (Mechanical engineering)
Classification: CPC F  B  Y | IPC B  F

Claim 13:
14. A method of constructing the floating platform for high-power wind turbines of claim 1, said method comprising:
a) pre-assembly of a rebar of the slab and the arrangement thereof in a submersible pontoon, with dimensions somewhat larger than said slab, and installation of formworks of the slab and the concreting thereof;
b) execution of lower concrete beams by means of a horizontal pre-tensioning which is executed as dry;
c) installation of sliding formworks in the centre and at the corners, wherein the five hollow reinforced concrete cylinders are concreted up to an intermediate height, above a flotation line of the platform;
d) sinking of the submersible pontoon in order to launch a substructure in this partially manufactured state, below a draft of the floating platform, at which time it is separated from the pontoon and is removed from it by pulling by means of a tugboat, in order to be transferred to another adjacent manufacturing area;
e) continuation of a concreting process until an entire height of the five hollow reinforced concrete cylinders is finished with the same formwork system which was used previously;
f) placement of metal elements which make up upper covers of the five hollow reinforced concrete cylinders by means of an overland crane located on the dock and securing thereof by means of anchor bolts which stiffly join them to walls of the five hollow reinforced concrete cylinders;
g) transfer of the platform to another manufacturing area floating by means of pulling from a tugboat;
h) ballasting of the platform by introducing seawater into the four peripheral cylinders until the partially constructed platform is supported on the seabed of the dock in this area;
i) installation of additional metal superstructure(s) and performing welding necessary to make a joint between two already installed portions of the metal superstructure; and
j) installation of a tower, a nacelle, a rotor and blades of the wind turbine by means of an overland crane located on the dock, while the deballasting of the five hollow reinforced concrete cylinders is progressively carried out so that, once an assembly process is completed, the platform remains afloat, completely constructed and ready to be towed to the installation site thereof in deep water.