The tallest wind turbines in the world are currently being erected near Schwäbisch Hall in the north-east of Baden-Württemberg. The Max Bögl Group is erecting four turbines with a total height of 240 m which will stand on enormous water basins. A Liebherr mobile crane has now erected the 40-m high active basins.
The water basins and the 40-m high tower foundations for the wind turbines are used as water storage facilities. Furthermore, the rotors of the turbines reach up to higher air layers where there is a greater chance of beneficial wind conditions. Currently the active basins consisting of 27 pre-stressed concrete rings are being constructed on which the wind turbines will then be erected. An LTM 11200-9.1 from Max Bögl is being used for this job. Fitted with 202 tonne of ballast, the mobile crane is hoisting the massive components onto each other. The nine-axle crane is handling a load of over 90 tonnes for this purpose.
The enormous concrete rings are supplied in four individual segments which are assembled on site and stressed using steel cables. The finished component has a diameter of 16 m and is 1.5 m high.
The Liebherr LTM 11200-9.1 will then also place some of the turbine towers on the 40-m high reservoir and will also assemble the Liebherr 630 EC-H 70 top-slewing crane required to complete the job on the reservoir tower. This self-climbing construction crane will reach a hook height of around 190 m above the ground. The four wind turbines in Gaildorf are due to go onto the grid before the end of 2017 whilst the pump accumulator system is to go into service at the end of 2018, at the latest.