Offshore fan prefabricated high pile bearing platform foundation structure and installation method

Abstract

The invention provides an offshore fan prefabricated high pile bearing platform foundation structure. The offshore fan prefabricated high pile bearing platform foundation structure comprises a bearingplatform structure, upper pipe piles, lower pipe piles and steel structure joints; the bearing platform structure consists of a cylindrical section, and a conical transition section with the top as acircular table; the cylindrical section and the conical transition section are integrally molded; the conical transition section is positioned above the cylindrical section; multiple upper pipe pilesare provided; one ends are peripherally and uniformly fixed on the lower surface edge of the bearing platform structure, and the other ends are fixedly connected with the lower pipe piles through thesteel structure joints; and included angles between the upper pipe piles and a horizontal plane of the bearing platform structure are smaller than 90 degrees. In addition, the invention further provides an installation method of the offshore fan prefabricated high pile bearing platform foundation structure.

Description

technical field [0001] The invention relates to the basic structure system of marine engineering structures, in particular to a prefabricated assembly type high pile cap foundation structure for offshore wind turbines that can be integrally assembled and a matching assembly and installation method thereof. Background technique [0002] At present, in marine structural engineering, the commonly used foundation types include pile foundation, bracket foundation, jacket foundation, gravity foundation, barrel foundation and floating platform structure. [0003] In general, steel pipes used in pile foundations, bracket foundations or jacket foundations have larger diameters and heavier weights, so expensive piling equipment, marine transportation equipment and on-site pouring equipment are required for construction. The gravity foundation needs to design and treat the seabed in the construction sea area in advance so that it can bear the load transmitted by the gravity foundation,...

AI Technical Summary

Problems solved by technology

The cylindrical foundation is mainly a long cylindrical steel structure. Although the construction process does not require high equipment, it is easy to cause buckling or subsidence of the steel structure in the working state, and it is often difficult to achieve the structure on the foundation. load requirements

Floating platform structures currently include Spar platforms or tension leg platforms. Their design, construction and construction are relatively complicated, and the cost investment is very high. There are also special requirements for the depth of the sea area, especially for common floating foundation structures, which require high construction equipment. The cost of construction in sea areas is higher

[0004] To sum up, the traditional offshore cap foundation structure usually requires on-site pouring and installation, which not only requires the transportation of corresponding pouring materials, but also the construction is greatly affected by the marine climate, resulting in technical problems of high construction cost and long production cycle

At the same time, the restrictions brought by cast-in-place also affect the application and promotion of high pile cap foundations, so that at this stage more single piles are used

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