In northern Sweden, the third construction section of Blaiken Wind Park is currently under construction. Up to 100 wind turbines with a total output of 250 MW are being built in this area. Once completed, Blaiken Wind Park will have an average annual electrical generating capacity of 700 GWh, which will meet the demands of approx. 150,000 households, and will be one of the largest wind farms in Europe.
In the third and last section of this project, 23 turbines, designed for wind velocities of 4 to 25m/s and a maximum performance of 2.5 MW each are being installed. The wind towers have a hub height of 100 m and a rotor diameter of 100 m. The design of the foundations for the wind towers had to take into account the strongly changing gusts of wind that often occur in this region.
In order to ensure the structural safety of the wind generators, massive foundations were erected that were permanently anchored in the load-bearing soil using strand anchors. For the deep anchoring of the tower foundations, DYWIDAG Sverige supplied a total of 184 18 to 23 m long permanent Type 27-0.62" strand anchors.
After drilling the boreholes, the strand anchors were inserted, grouted in their bonded lengths and post-tensioned.