A composite offshore wind turbine foundation with jacket-cylindrical structure

Abstract

A guide pipe frame-cylindrical structure combined offshore wind turbine foundation is composed of a cylindrical foundation part and a guide pipe frame part. The cylindrical foundation part comprises a cylindrical steel wall, a concrete cover plate, a prestressed beam and a connecting beam, wherein the concrete cover plate, the prestressed beam and the connecting beam are connected into a whole in a poured mode. The guide pipe frame part comprises four steel leg columns, steel supporting pipes, connecting cylinders and flanges, wherein the steel leg columns and the connecting cylinders are welded and fixed through the steel supporting pipes respectively, the four steel leg columns are fixed to the middle of the connecting beam 4 of the concrete cover plate, and the connecting cylinders are connected with a wind turbine tower through the flanges. The guide pipe frame-cylindrical structure combined offshore wind turbine foundation has the advantages that a top plate bearing mode is adopted by the guide pipe frame-cylindrical structure of the offshore wind turbine foundation so that the resistance to the bending moment of the whole foundation can be improved remarkably, and the requirement for the bearing capacity of the foundation is lowered; the negative pressure sinking installation mode is adopted, so that the construction speed is high; the whole structure is overall prefabricated and assembled on a shore, floatingly-transported on the sea and installed in a negative pressure sinking mode on the sea, as a result, construction is convenient, efficiency is high, and cost is low.

Description

technical field [0001] The invention relates to an offshore wind turbine foundation structure, in particular to a jacket-cylindrical structure composite offshore wind turbine foundation. Background technique [0002] As a green, clean and renewable energy, wind energy has been favored by energy developers in various countries, and offshore wind power occupies a very important position in wind energy projects. The offshore environment is complex and changeable, and the safety, economy and adaptability of the infrastructure are the key factors restricting the development of offshore wind power. In the construction of offshore wind farms, the infrastructure is a top priority. There are various types of offshore wind power foundation structures, including multi-pile jackets, single piles, tripod foundations, gravity foundations, barrel foundations, and floating foundations. [0003] Jacket wind turbine foundation is an important foundation form of offshore wind turbine foundat...

AI Technical Summary

Problems solved by technology

The traditional jacket foundation involves offshore pile sinking, and the construction period is long

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