Kentish Flats, Offshore Wind Energy Park

MT Højgaard has supplied and installed 30 wind turbine foundations at Kentish Flats in the outer Thames estuary on the English east coast.

 The contract comprised the supply and installation of 30 wind turbine foundations at Kentish Flats in the outer Thames estuary on the English east coast.

The project was completed ahead of schedule at the end of 2004. We were subcontractor to NEG Micon, who delivered and assembled the wind turbines on top of the foundations.

The foundation is based on a steel monopile solution with a grouted transition piece installed on top of it, allowing for a standard flange connection to the turbine tower. The large steel tubular piles have a length of up to 44 meters.

Monopiles driven into seabed by hydraulic hammer

The monopiles are driven 30-35 meters into the seabed by a hydraulic hammer suspended from a large crane. The crane is located onboard a jack-up vessel which is manoeuvred from pile position to pile position.

J-tube arrangements

On top of the monopiles the transition pieces are positioned, having all accessories such as boat landing, J-tube arrangements and anodes pre-assembled and attached. Finally the external platforms are installed, completing the erection.