Offshore wind turbine foundation and towing and mounting method

Abstract

The invention discloses an offshore wind turbine foundation and a towing and mounting method. A sliding base and a fixed base of a hollow structure in the foundation can jointly provide buoyancy, andenough buoyancy and stability can be provided by stacking upper and lower bases, so that an integral structure formed by the wind turbine foundation, a tower drum and a wind turbine generator can automatically float on the sea surface, the whole has self-floating stability, no special marine transportation equipment is needed, marine transportation can be achieved only through towing of a tugboat,the cost of marine towing of the wind turbine foundation is reduced, the flexibility of marine transportation is greatly improved, and the marine transportation efficiency is better improved; therefore, the foundation can be prefabricated and installed on the land together with the upper tower drum and the wind turbine generator; and during installation, an annular cylinder skirt slides down to the seabed surface, the overall perpendicularity of the foundation can be accurately adjusted in the suction injection process, and the overall installation requirement is met. Only one set of pump prying block system and one auxiliary ship are needed in the whole installation process, large professional construction operation ships such as floating cranes are not needed, seabed pretreatment is notneeded, the installation cost is saved, and the installation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of transportation of wind turbine foundations, in particular to an offshore wind turbine foundation, towing and installation methods. Background technique [0002] The foundation forms of wind turbines mainly used in offshore wind power projects under construction are: jacket foundation and single pile foundation. The single pile foundation is suitable for areas with a water depth of 20-30m, while the jacket foundation is suitable for areas with a water depth of 20-50m. [0003] The foundation weight of offshore wind turbines is very heavy, so it is very difficult to transport or install them offshore. At present, the wind turbine foundation is divided into several sections, and each section is towed to the offshore platform by a tugboat, and then assembled on the offshore platform before on-site construction and installation. The existing hauling and installation methods have the following problems, which...

AI Technical Summary

Problems solved by technology

The following problems exist in the existing haulage and installation methods, mainly reflected in: 1. Due to the very large volume and weight of the fan base, a large tugboat is required for haulage, and a heavy floating crane is required for installation, and the construction cost is high

2. There are many procedures for offshore installation and construction. For wind power site construction operations in tropical or subtropical regions, the sea conditions are harsh, and the effective construction operation window period is small and discontinuous, which increases the cost of offshore construction operations.

3. For the environment with deep water depth and harsh sea conditions in the sea area, the installation and construction cost of offshore wind turbines is high, and due to the deep water depth, there are currently few marine machines available

Images