City Tunnel Leipzig
In inner-city railroad tunnels sound emissions have to be curbed as far as possible. This is achieved by using so-called spring/mass systems. So that they work perfectly, it was necessary to uniformly raise concreted track slabs over their entire length and lower them onto elastomer bearings. They were lifted with a computer-controlled synchronized lifting system.
With suitable programming, lifting can be performed synchronously or with a ramp function. With ramp-function lifting, we raised 1,200 meters of continuous track slabs section by section. Because of the connecting reinforcement projected from the track slabs, materials could not be carried on them. For our lifting frames we therefore developed running gear enabling them to be shifted on the existing crane rails.