The Anholt project is based on the monopile concept. This means that a single pile is driven into the seabed. Pile driving is a quick installation process, and the piles are relatively cheap to produce compared to other foundation types. The geotechnical investigations show that the seabed in the area consists of soft clay and sand which makes this type of foundation particularly ideal.
The monopile foundation is a round steel pile with a diameter of approx 5 metres with a wall thickness of 5-9cm. The length of the monopile is adjusted to the specific location and varies from 37-54 metres. By means of a large hydraulic hammer the monopile pile is driven 18-36 metres into the seabed depending on the water depth and seabed conditions.
The monopiles will be installed by the barge crane Svanen.
Subsequently, a transition piece is mounted on the monopile. The transition piece is cast to the monopile which ensures that the wind turbine is completely vertical. The transition piece includes boat landing, ladders, internal and external work platforms and j-tubes for the submarine cables.