Spar type assembly prestressed reinforced concrete floating offshore wind turbine foundation

Abstract

The invention provides a Spar type assembly prestressed reinforced concrete floating offshore wind turbine foundation, which serves offshore wind power development. The foundation comprises a plurality of prefabricated prestressed reinforced concrete assembly components; the interior of each assembly component adopts a hollow cylinder; a prestressed steel bar porous channel is reserved in a cylinder wall; a circular flange plate is arranged at the bottom; the integral rigidity of the Spar foundation is guaranteed through post-tensioned prestressing assembly; the anti-cracking and anticorrosion performances are improved. A circular groove with a diameter being the same with that of the hollow cylinder is formed in the center of the bottom of the fringe plate, so as to enhance the overall stability and water tightness of an assembly structure. Solid and liquid ballasts can be filled in the component in the lowest part. The overwater height of the foundation is about one fifth to one tenth of the total height of the foundation, and a wind driven generator is mounted at the top of a vertical column. A cable guide device is embedded in a column body, a cable guide hole is formed in a flange, and a mooring line is connected with a seabed anchor. Compared with the Spar type foundation with a traditional steel structure, the prefabricated assembly component has the advantages that the prefabricated assembly component is made from lightweight and high-strength marine concrete, the construction technology is simple, occupied field can be reduced, the construction difficulty and cost can be reduced, and fans with different powers and water depths can be adapted through the adjustment of the quantity of prefabricated components.

Description

technical field [0001] The invention belongs to the field of wind power generation and relates to an offshore floating wind turbine foundation. Background technique [0002] The gradual depletion of land wind resources has shifted human attention to a new direction of clean energy—offshore wind power. Offshore wind power has the advantages of high wind speed, large power, stable operation, and is suitable for large-scale development. Moreover, the southeast coastal areas with the most abundant offshore wind energy resources are adjacent to economically developed areas with large demand for electricity, which can realize nearby consumption of electricity and reduce transportation costs. , great potential for development. It is estimated that the energy efficiency of offshore wind energy resources is 20% to 40% higher than that of onshore wind power. [0003] For deep-water marine environments with a water depth greater than 40 meters, the basic economy of floating wind turb...

AI Technical Summary

Problems solved by technology

However, the small water surface area cannot contribute to the stability of the rolling and pitching directions, and the overturning moment of the wind turbine will reduce the foundation stability and the efficiency of the wind turbine.

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