Intended to bore a tunnel for an extension of Dusseldorf’s “Wehrhahn” metro line, the tunnel-boring machine was assembled rapidly during the nights.
A major challenge to lifting was presented by the small size of the workspace.
“We had to position the load precisely, so that the technicians in the construction pit could mount the cutter head at the front of the 65m-long tunnel boring machine. To allow us to work within the available 12m radius, we rigged the Terex CC 2500-1 with a 54m SH main boom, Superlift configuration and 100t of Superlift ballast,” explained crane driver Tim Langer.
An auxiliary crane was used during the second part of the lifts for turning lifted components in midair.
Notwithstanding the site constraints, technicians for two weeks from the hours of 9pm to 5am, and delivered the completed machine five hours ahead of schedule.
