BRIDGES Ӏ SECTOR SPOTLIGHT
Who: Liebherr / Implenia / Plauen Stahl Technologie / ZSB Zwickauer Sonderstahlbau. What: Liebherr cranes are helping replace the Rader High Bridge, Germany's second-longest steel road bridge. Where: Schleswig-Holstein, Germany (where the A7 motorway crosses the Kiel Canal).
18 Liebherr cranes are helping replace and widen the Rader High Bridge in one of Germany’s largest bridge modernisation projects. It is being carried out by a consortium headed by Swiss construction company Implenia, together with two Saxony-based companies – Plauen Stahl Technologie and ZSB Zwickauer Sonderstahlbau. Specifically, five fast-erecting cranes
(two 65 Ks and three 81 Ks) are on site to assist with the foundations while the new bridge piers are being built with the help of six 125 EC-B and seven 150 EC-B flat-top cranes. The first crane on the site was a 125 EC-B. This was assembled in the
waters of Lake Borgstedt, where the crane stood on the first pier’s pile cap secured by foundation anchors. This crane was assembled by a 250-tonne Liebherr LR 1250 crawler crane on a floating platform. The crawler then assembled three further 125 EC-Bs from the floating platform. A 150 EC-B 8 Litronic started off
working on the bridge on the land but, at the end of June 2024, was moved and reassembled in the water with the help of a 220-tonne crawler crane on a floating platform. Liebherr’s Tower Crane Solutions
(TCS) team was involved with the complex planning.
A major challenge lay in the cranes being assembled by the crawler crane on the floating platform. As the permissible hook height of the crawler crane on the floating platform was restricted, the assembly height had to be kept as low as possible. However, a certain tower height was also necessary so that the cranes could be climbed. Various options and tower systems were therefore investigated in the run-up to the project in order to find the best solution. The TCS team was also involved with determining the configuration of the tower combinations to prevent the towers from colliding with the newly erected bridge piers.
30 CRANES TODAY
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