Jacket Foundations

The offshore wind turbine jacket foundation is a multi-pile space truss-type steel structure foundation. It is formed by welding the main legs, braces and nodes together. It is fixed to the seabed through submarine pile foundations and supports the wind turbine tower and equipment at the top. It is specially designed for offshore wind power projects in medium and deep waters, in complex sea conditions and with complex geological conditions. It has a large overall stiffness and strong load-bearing capacity. 

Application scenario

Suitable for wind power projects in medium-depth waters with a depth ranging from 30 to 60 meters. It can adapt to the maximum water depth of 80 meters. It is applicable to complex geological conditions such as underwater rocks and hard soil layers, as well as harsh sea conditions with large wave and current loads. It is mainly matched with large-power offshore wind turbines and deep-sea wind power projects. At the same time, it can also be adapted for the construction of offshore wind power substation foundations. 

Main structure

It consists of multiple large-diameter steel pipe main legs, horizontal braces, X-shaped/K-shaped diagonal braces, forming an overall truss system; it includes pile foundation sleeves, pile boots, positioning and guiding structures; a tower tube support platform and connection flange structure are set at the top; ancillary structures such as anode anti-corrosion supports, operation and maintenance tools, and lifting points are also provided; the welding of nodes is the core quality control part. 

Corresponding product standards

- DNV-ST-0119 "Standard for Design of Offshore Wind Turbine Structures"

- ISO 19902 "Design of Fixed Offshore Steel Structure Platforms"

- GB 51308 "Design Specifications for Steel Structures in Offshore Wind Farms"

- API Spec 2W/2Y "Steel Plates for Offshore Structures"

- NORSOK M-101 "General Standard for Steel Structure Manufacturing"