Offshore wind turbine composite cylindrical foundation of support-free single-column structure

Abstract

The invention belongs to the field of offshore wind turbines, and provides an offshore wind turbine composite barrel type foundation of a support-free single-column structure, which comprises a thin-wall outer barrel, a thin-wall inner barrel arranged at the central position of an inner cavity of the thin-wall outer barrel, a single-column transition section arranged on the thin-wall outer barrel and used for being connected with a wind turbine tower barrel, and a single-column foundation arranged between the thin-wall outer barrel and the single-column transition section and used for being connected with a wind turbine tower barrel. The conical variable-diameter force transmission structure is used for transmitting loads, and the reinforcing cylinder is arranged outside the thin-wall outer cylinder; wherein the interior of a cavity between the thin-wall outer cylinder and the thin-wall inner cylinder is divided into a plurality of first sealed cabins through a plurality of first cabin dividing plates; a plurality of reinforcing ribs are connected between the thin-wall outer cylinder and the reinforcing cylinder, and the interior of the reinforcing cylinder is divided into a plurality of second sealed cabins through a plurality of second cabin dividing plates. By arranging the conical reducing force transmission structure, the area, affected by stormy waves, of the composite barrel type foundation can be effectively reduced, and the berthing influence of an underwater structure on an operation and maintenance ship can be reduced.

Description

technical field [0001] The invention relates to the field of offshore wind turbines, in particular to a composite cylindrical foundation for offshore wind turbines with an unsupported single-column structure. Background technique [0002] With the country's emphasis on environmental protection, the urgent need for green energy, the abundant offshore wind resources, and the explosive development of the offshore wind power industry, the construction of offshore wind farms in China is currently mainly constructed in offshore shallow seas, and mainly uses jackets, single piles, The composite tube foundation with support is mainly used, and the jacket and single pile are mainly constructed on the sea. Due to the risks of offshore construction and the uncertainty of the construction window period, offshore construction is an important bottleneck restricting the development of offshore wind power. With the promotion of the composite tube foundation, the operation mode of the tradit...

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Problems solved by technology

[0002] With the country's emphasis on environmental protection, the urgent need for green energy and the abundant wind resources at sea, and the explosive development of the offshore wind power industry, the current construction of China's offshore wind farms is mainly in offshore shallow seas, and mainly uses jackets, single piles, Composite tube foundations with supports are the mainstays, and jackets and single piles are mainly constructed offshore. Due to the risks of offshore construction and the uncertainty of the construction window period, offshore construction is an important bottleneck restricting the development of offshore wind power. With the promotion of composite tube foundations, the operation mode of traditional jackets and single piles has been changed, and the original offshore construction work has been moved to the shore, reducing the time of offshore construction operations; The supporting steel structure is the main structure, and the concrete transition section needs to prefabricate the pouring formwork to increase the cost, and the construction period of the concrete is long, the construction is difficult and complex, and the concrete operation requires a good weather environment, so many uncertain factors also restrict the composite tube of the concrete transition section The development of the foundation; in addition, the all-steel composite cylindrical foundation with a support structure is also subject to a huge support system. The support structure needs to increase the amount of steel used to increase the difficulty of construction, and the support system is completely submerged after the foundation is installed offshore. In seawater, the wave receiving area is increased, and it affects the berthing of operation and maintenance ships, so the unsupported single-column composite tube can better reflect the superiority of the structural system

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