Alewijnse Marine equipment for British offshore wind farm construction

For GeoSea, DEME's water engineering specialist, Alewijnse built two similar QA Bolt Tension Logging systems that have been used in the installation of 56 wind turbines at the Galloper Offshore Wind Farm off the east coast of England.

Wind turbine construction

Alewijnse Marine successfully delivered two QA Bolt Tension Logging systems that played an important role in the high-precision installation process for the wind turbines. The systems ensured that each of the 128 large M72 bolts that secure each monopile to its transition piece was fixed at the correct tension and torque.


Product manager Johan van Rikxoort commented: “These unique systems delivered by Alewijnse Marine use barcode scanners to identify each of the uniquely numbered bolts. Once identified, the related tension and torque of each bolt was measured and logged. This advanced data is used by GeoSea and the end client for processing activities and quality assurance.”

Offshore wind

GeoSea completed the offshore wind farm installation in late March 2017, two months ahead of schedule, using its own state-of-the-art installation vessel Innovation. The Galloper Offshore Wind Farm is located in the North Sea, 27 km off the Suffolk coast, and is comprised of 56 wind turbines generating up to 336MW in total. It has the capacity to provide electricity for up to 336,000 households in the UK.


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