Offshore wind generating set gravity type foundation and mounting method thereof

Abstract

The invention relates to an offshore wind generating set gravity type foundation and a mounting method thereof. The gravity type foundation comprises a steel pipe pile, a concrete caisson and ballastpadding, wherein the steel pipe pile is a variable cross-section large-diameter steel pipe, a shear key is arranged on the connection portion, between the steel pipe pile and a concrete caisson coverplate along the pile periphery, a bay of the concrete caisson is filled with the ballast padding, and the gravity type foundation is arranged on the seabed surface paved with a broken stone hardcore.The offshore wind generating set gravity type foundation and the mounting method thereof have the advantages that a steel pipe pile-concrete caisson combination gravity type structure is adopted, thesteel pipe pile provides enough strength and stiffness for the foundation structure, the structure weight is reduced, a floating-sinking marine transport installation method is adopted, heavy type floating crane equipment is not needed, the offshore operation is simple and convenient, the prefabricated construction is carried out on land, the construction time and cost are saved, the structure isless affected by waves and ocean current, the stability is good, and the offshore wind generating set gravity type foundation can be used for deepwater sea areas, high-capacity wind generating sets and offshore wind plants of which the geological conditions are shallow covering layers.

Description

technical field [0001] The invention relates to the technical field of foundation structures of offshore wind power generating sets, in particular to a gravity foundation of offshore wind power generating sets and an installation method thereof. Background technique [0002] At present, wind power has become the energy utilization method with the most mature technology, the lowest cost and the least damage to the environment in the field of renewable energy, and it is the most economically competitive new energy type. At present, most of my country's offshore wind farms are built in typhoon-prone sea areas, and the power of wind turbines used is increasing. The loads on high-power wind turbines in typhoon-prone areas are huge, and the rigidity and strength of the foundation are higher. , the increase of wind turbine capacity and the diversity of seabed geological conditions in deep waters pose new requirements and challenges for the basic structure of offshore wind turbines. ...

AI Technical Summary

Problems solved by technology

However, traditional caissons are mostly reinforced concrete structures. Due to the large volume and dead weight of gravity foundations, large-scale lifting equipment is required for marine transportation and installation. Suitable for shallow waters with a water depth of no more than 10 meters

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