Scope of works performed
Lowering by 40 m on a swimming dock of the old steel structure (length of 121.10 m, weight of 1,465 t)Lifting of the new structure with same length and weight
Tilting operations to pass through existing supports by a combination of horizontal and vertical movements
Owner
Bundesministerium für Verkehr, Bau- und Wohnungswesen, Wasser- und Schifffahrtsdirektion NordEngineering + Main Contractor
Krupp Stahlbau HannoverEngineering Consultant
Prof. Sedlacek & PartnerVSL Entity
VSL(Switzerland) Ltd.Heavy Lifting Department
Date
2006Project Description
VSL Heavy Lifting removed the old center part of the historical bridge and lifted the new bridge in its place, saving existing supports.On the 1 of June 1920 the historical train bridge, crossing the Kiel Canal near Hochdonn, was opened. Ever since it is connecting the city of Hamburg with Sylt, an island in the North Sea. General deterioration of the main span and damages caused by two ship collisions were responsible for the necessary replacement of the center part of the bridge. Reusing the existing support points of the main span for the new part the old 122m long span had to be passe through the clear gap of only 120m bwetween supports. This daring feat was realized by installing two special portal frames near the support axes.
Each frame was held back and adjusted to the required inclination by two VSL strand units SMU 220/550. Another two strand units SMU 330/550 placed vertically in platforms and suspended in the upper part of the frame, allowed hooking up the span in 4 points. This configuration allowed to move the suspended span by about 2 m longitudinally and to incline it permitting to lower the span through the bottleneck between supports.
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