Assembled inclined-pile foundation for offshore wind turbine

Abstract

The invention discloses an assembled inclined-pile foundation for an offshore wind turbine. The assembled inclined-pile foundation comprises a wind turbine tower, steel pile foundation bodies and a switching steel structure connected between the steel pile foundation bodies and the wind turbine tower. The steel pile foundation bodies are installed towards the wind turbine tower in an inclined mode. The wind turbine tower and the steel pile foundation bodies are connected with the switching steel structure through flanges. The switching steel structure is of a branch-shaped structure comprising a center cylinder and a plurality of welded branches on the periphery of the center cylinder. The bottom ends of the branches are coaxially connected with the top ends of the steel pile foundation bodies through the corresponding flanges respectively. The top end of the center cylinder is coaxially connected with the bottom end of the wind turbine tower through the corresponding flange. The assembled inclined-pile foundation is high in bearing capacity and reliability, good in fatigue resistance, free of site welding and grouting and low in requirement for engineering equipment and construction technologies.

Description

technical field [0001] The invention relates to a pile foundation structure, in particular to an assembled inclined pile foundation for offshore wind turbines, which is suitable for wind turbines with large installed capacity and deep sea areas. Background technique [0002] Wind energy is currently one of the fastest growing renewable energy sources with the best industrial prospects. Due to the high wind speed, long-lasting and stable wind force and high wind energy output at sea, the small wind turbulence has little loss of life of wind turbines, and the construction and use of wind turbines are less restricted by land and environmental noise. Wind turbines have moved from land to sea and large-scale become the trend of international wind power development. [0003] At present, offshore wind turbines generally use large-diameter single pile foundations, tripod foundations and tetrapod foundations, jacket foundations, high pile cap foundations and other foundation forms. ...

AI Technical Summary

Problems solved by technology

However, the construction of its bearing platform requires various measures such as steel box, steel cage hoisting and concrete mixing, and the curing time is long; when large-volume concrete is poured, it is very easy to produce large-area temperature cracks and shrinkage cracks on the surface of the bearing platform, which affects the bearing platform. Structural durability; large-volume concrete structure with high cantilever, unfavorable for earthquake resistance; high cost and long construction period

[0008] Based on the above analysis, there is a lack of a new form of pile foundation that is safe, reliable, convenient to construct, and economically reasonable to promote the rapid development of offshore wind power.

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