This year's bridge construction excursion took place on 23.06.2023 at the invitation of Autobahn GmbH, Westphalia branch, Netphen branch office. As in the 2019 summer semester, the destination was the Rinsdorf and Rälsbach valley bridges south of Siegen, which are being replaced by new structures as part of the A45 expansion project. The participants were informed in detail by Mr. Gunther Nöh from Autobahn GmbH about the process and the current status of the construction project.
The northern sections of the new replacement structures for both bridges have already been completed and are open to traffic. The steel trough of the future steel composite cross-section of the southern section of the Rinsdorf viaduct is currently being erected using the incremental launching method (left on the left-hand photo). At the Rälsbach viaduct, the prestressed concrete superstructure of the southern section of the bridge is currently being built in sections on falsework. The photo on the right shows the reinforcement of the two-cell box girder cross-section.
