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Successful project for ballasted gravity bases


The Kårehamn wind farm project in Sweden chose a solution using concrete gravity bases produced in and transported from Belgium and installed on site in the Baltic Sea.


The installed gravity bases were given the needed weight to stand securely and withstand the forces of nature on site, by being ballasted with the proven and sustainable solution MagnaDense.


PROJECT DETAIL


The E-On Vind AB owned project, named 'Kårehamn wind farm' was built in the Baltic Sea just outside of Kårehamn on the South East Coast of Sweden. It was installed in 2012 and became operational in 2013. LKAB Minerals (then named Minelco) supplied ~23,000mt of MagnaDense, a high density natural iron oxide, for ballasting the gravity bases.


The wind farm project is the largest project of its kind in Sweden at a cost of around €120 million, it made use of 16 (3MW V112) turbines and has a capacity of 48 megawatt (MW), generating 180GWh of renewable electricity per year.


PILES COULD NOT BE USED


Due to the soil conditions impeding the use of piles, concrete gravity base foundations ranging from 15- 25m wide and weighing up to 1,950 tonnes each, were chosen to anchor the turbines to the seabed.


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www.windenergynetwork.co.uk


EAST OF ENGLAND SPOTLIGHT ON


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