High-rise pile cap offshore wind power foundation combining vertical single pile and multiple raking piles

Abstract

The invention discloses a high-rise pile cap offshore wind power foundation combining a vertical single pile and multiple raking piles. The foundation comprises a bearing platform, the multiple raking piles and the single pile, wherein the upper ends of the raking piles and the upper end of the single pile are positioned above the sea level, the lower ends of the raking piles and the lower end of the single pile are inserted below the sea level, the multiple raking piles are uniformly distributed on a circumference with the single pile serving as a circle center, and the top ends of the multiple raking piles and the top end of the single pile are fixedly connected onto the lower end surface of the bearing platform. Besides, the upper end surface of the bearing platform is connected with a blower tower through a flange; and the number of the raking piles is 3-8, and the multiple raking piles are radially and uniformly distributed on the circumference with the single pile serving as a circle center. With the adoption of the high-rise pile cap offshore wind power foundation combining the vertical single pile and the multiple raking piles, the defect of a single pile foundation in the aspect of resisting to great horizontal force and bending moment load is overcome, the problem that a pile group foundation has more foundation piles and larger diameters can be effectively solved, and meanwhile, the construction difficulty and the construction cost are low; soil mass in larger range can be enabled to be involved in resistance to horizontal force and bending moment, horizontal resistance of the foundation soil mass can be sufficiently played, the horizontal bearing performance of a foundation pile is improved, and the antidumping capacity of the foundation is improved.

Description

technical field [0001] The invention relates to an offshore wind power foundation. In particular, it relates to a high pile cap offshore wind power foundation of a combined vertical single pile and multiple inclined piles connected by a vertical large-diameter single pile and multiple inclined piles through the cap. Background technique [0002] Offshore wind power, as a new model with the advantages of continuous stability, large power generation, and no occupation of land resources, has been valued and favored by many countries in the world in recent years. Among the factors that ensure the safe and stable operation of offshore wind farms, infrastructure is the most important. The geological conditions of the seabed are more difficult to control than those on land, and the stability, durability and economy of the basic structure become important factors affecting the selection of the structure. [0003] Offshore wind power structures bear relatively small vertical loads,...

AI Technical Summary

Problems solved by technology

With the continuous development of the scale of offshore wind power generation, the single unit capacity of offshore wind turbines has increased to 5MW or more, which will inevitably lead to a sudden increase in the diameter and wall thickness of the single pile foundation, making offshore construction difficult and construction costs higher

Although the group piles can effectively improve the anti-overturning ability, but the number of piles is large, the offshore construction is more difficult and the cost is higher

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