Reinforced concrete-steel structure hybrid gravity foundation for offshore wind power and construction method thereof

Abstract

The invention discloses a reinforced concrete-steel structure hybrid gravity foundation for offshore wind power. The reinforced concrete-steel structure hybrid gravity foundation comprises a caisson base and an upper steel support structure, wherein the caisson base has a gravity type reinforced concrete cavity structure; the steel support structure is fixed on the caisson base; the top end of the steel support structure is provided with a foundation ring which is connected with a fan tower; the caisson base and / or the steel support structure is provided with an irrigation channel which is communicated to the cavity of the caisson base. The invention further discloses a construction method of the reinforced concrete-steel structure hybrid type gravity foundation for offshore wind power. Compared with an ordinary jacket and single pile foundation, the reinforced concrete-steel structure hybrid gravity foundation has the advantages that the advantages of a reinforced concrete structure and a steel structure are combined organically; the reinforced concrete cavity structure is taken as a foundation base, and the steel structure is taken as an upper support structure; a pile foundation is not required; the foundation is made on the land, is assembled integrally, and can be transported by means of semi-submersible barge or the own buoyance. The reinforced concrete-steel structure hybrid gravity foundation is easy and convenient for construction, is shorter in the construction period, is economical, and has a wide application prospect in an offshore wind power project.

Description

technical field [0001] The invention belongs to the technical field of offshore wind power foundation engineering, and in particular relates to a steel concrete-steel structure hybrid gravity foundation for offshore wind power and a construction method thereof. Background technique [0002] The offshore wind power foundation project is constructed on the sea, which is greatly affected by natural conditions and the working conditions are relatively harsh. It has the characteristics of short construction time on site, high construction difficulty, and low efficiency. [0003] At present, jackets and single large-diameter steel pipe piles are commonly used foundation structures for offshore wind power. The jacket is a steel truss structure, which has the advantages of high rigidity, good stability, and relatively economical materials. However, the jacket uses the pile foundation as the supporting structure, and the construction of the pile foundation needs to send piles underw...

AI Technical Summary

Problems solved by technology

However, the single pile structure has a large cross-section, large wall thickness, heavy weight, and a large amount of steel. It requires high lifting and piling equipment, and the construction cost is relatively high. In addition, the single pile structure is currently not suitable for areas where pile foundation rock-socketed construction is required. , because the construction of large-diameter rock-socketed piles is difficult, and there are few construction machines, the construction cost is extremely high

Images