Construction timeline
The project began with the removal of 400 metres of existing track. Rails, sleepers, and all other track components were fully dismantled and professionally disposed of. Simultaneously, two temporary bridges, each measuring 19.20 metres in length, were dismantled. Preparatory works for the installation of the new bridge structures were then carried out on the substructure.
A central element of the project was the installation of two new steel superstructures to replace the existing bridge system. These were lifted and positioned with precision using tandem crane operations, meeting all structural and static requirements. Following this, transition structures were installed to ensure a seamless and secure connection between the new bridge components and the railway line. These transitions were meticulously aligned with the existing track geometry.
To guarantee long-term stability and optimal load distribution, the bearings and transition structures were subsequently grouted to specification. As construction progressed, the HGT base layer was installed, followed by the placement of under ballast mats. These contribute to improved track bed damping, reduce vibrations, and help extend the service life of the track superstructure.
Following the completion of foundation and substructure works, a new 400-metre section of track was constructed. New rails and sleepers were laid, aligned, and fixed in accordance with all technical specifications.
To ensure continuous track geometry, the track was machine-tamped and adjusted to its final position. A subsequent stress neutralisation process was carried out, followed by a total of eight thermite welds to establish durable and load-resistant rail joints.
On the home stretch
All construction activities were executed in compliance with the highest safety and quality standards. The trades involved worked in close coordination, enabling the project to be completed on schedule and the track section to be returned to operation as planned.
The entire project was documented on film. Over the past weeks, five time-lapse videos of the construction phases were published on our YouTube channel – and now, the full video compilation is available online.
For more information, please visit our digital project board for the Railway bridge Wittenhusen.
