As part of the energy transition, Germany is to be supplied predominantly with electricity from renewable sources by 2045. The expansion of renewable energies alone is not enough, as the electricity from wind and sun must reach where it is needed. To achieve this, around 18,000 kilometers of electricity grid must be reinforced or newly expanded throughout Germany. In order to achieve these goals, the planning, approval and expansion of power lines has picked up speed considerably in the last two years. [Source: www.bundesregierung.de]
The company ARGE SOL C1 (consisting of Köster and Wayss&Freytag) has been commissioned by TenneT TSO GmbH to carry out the civil engineering work for planning section C1 of SuedOstLink. SuedOstLink is an extra-high voltage direct current transmission line and will be laid underground. The commissioned section stretches over 55 km from Münchenreuth in the district of Hof to Marktredwitz in the district of Wunsiedel.
In order to bring the power lines underground, the topsoil will be removed along the route over a width of approx. 40 meters and the lines will be laid in two trapezoidal trenches. However, the entire excavated soil cannot be used in this form to refill the trench. Large and sharp stones could damage the power lines during backfilling and must therefore be removed beforehand. For soil preparation, ARGE SOL C1 relies on the mobile SPLITTER technology of the SPLITTER X2 from ANLAGENBAU GÜNTHER.
The SPLITTER X2 is a chain-mobile 2-fraction spiral shaft screen, predestined for heavy and poorly screenable material. The machine is equipped with a plate conveyor for feeding the material, which equalizes the material and feeds it evenly onto the downstream SPLITTER screen deck. The SPLITTER X2 with its stable and robust SPLITTER TWIN WAVE is perfectly suited for this type of soil excavation with heavy and sticky components. Thanks to the adjustable angle of inclination of the spiral shafts, the material remains on the screen deck for longer and is effectively cleaned. The larger components contained in the feed material, mainly stones, contribute to the dissolution of the sticky components through the falling movement and also ensure self-cleaning of the screen deck and consistent screen quality. The oversize particles, the stones and components larger than 40 mm, are crushed in a downstream crusher and mixed again with the undersize particles, the soil, in another downstream mixer. The excavated soil prepared in this way can now be used safely for backfilling.
For SuedOstLink, two SPLITTER X2s are being used at two processing sites along the power line. Depending on the distance, the excavated soil is driven to the nearest site, processed and brought back to the construction site.
In contrast to other machines, the SPLITTER X2 is easy to maneuver thanks to its mobility on a tracked chassis including remote control. In comparison to other screening technologies, the SPLITTER X2 achieves high screening accuracy with a high throughput, which is an enormous advantage for this project. The SPLITTER spiral shaft technology also eliminates the need for a great deal of cleaning and maintenance work with gluing or winders, as the system has an integrated self-cleaning effect in its design. The splitter is easy to work on soils, some of which are very cohesive.
