Foundations

The wind turbines have been placed on monopiles with transition pieces. Monopiles are steel tubes that are driven into the seabed. Transition pieces which carry the secondary steel elements such as boat landings, ladders and platforms which are required for the safe access and operation of the wind turbines, have been attached to the monopile foundation. The wind turbine towers have then been bolted to the top flange of the transition piece.

These design, fabrication and installation activities have aimed to ensure a foundation which will provide stability to the wind turbines over 25 years in all North Sea weather conditions.

Main Points of Design:

• Transition piece/monopile connected via a bolted flange connection.
• Upper part of boat landing installed onshore to transition piece.
• Lower part of boat landing installed after monopile installation.