BAM Nuttall to Construct a Worldwide First; Wind Farm Gravity Bases
Posted on: 10/06/2016

Construction engineers BAM Nuttall will design, construct, and install 5 large gravity base foundations for wind turbines, which will be the first of its kind to be built.

Each unit of the turbine will include a combined concrete and steel structure, at an overall height of 60m. The turbine will stretch 40m below sea level, each weighting 13,000t with a diameter of 30m per base.

Bam has been commissioned by EDF Energy Renewables to build the wind turbine bases for the Blyth offshore wind farm, in the Northumberland area. Offshore work will begin in 2017 to install the turbines, and the power generated from this will eventually be transmitted to the National Grid.

The concrete base project will provide an insight into how these types of bases can be used in the future for further offshore wind farms. The bases will be floated and sunk into position using tugs, which has been described by EDF as a ‘float and sink’ method.

BAM Nuttall’s Head of Civil Engineering, Malcolm Corlett, said;

“This is a very significant milestone not just for Bam but for the wider offshore wind sector. An opportunity to demonstrate the potential for self-installing concrete gravity bases to provide economic foundations for large wind turbines in deeper water,”

It is expected that the project will be completed by the middle of 2017.

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