16 Nov 04
Copenhagen lift keeps trains and telephones working
A 43m bridge has been successfully lifted into position around the structure it replaces without disrupting Copenhagen's rail traffic. The main challenge was to carry 10 main telephone cables which could not be cut, nor even moved aside by more than 1m. The solution, devised by consultant COWI, was to build the new 5m wide bridge around the narrower original structure. The cables were then moved before the old bridge was dismantled. The new bridge is made up of two 800mm diameter steel pipes, bolted to steel beams. Each pipe arrived on site in one piece including its piers and was positioned within three hours over two nights. The old riveted steel bridge was then cut into three pieces and removed over the next three nights. Work to finish off the deck can take place during the day and the project is due for completion next month. Client for the scheme is Copenhagen's Municipality.