In the following a selection of current or completed projects.
Kunde: SBB AG
Aufgabe: Superstructure management slab
track Letzigraben- and
The Letzigraben (1156 m) and Kohlendreieckbrücke (394 m) are bridge structures built as part of the so-called Altstetten-Zurich HB-Oerlikon (DML) cross-city line. Together they form the exit from the new underground railway station Löwenstrasse heading west.
Construction work began in 2008 with the "reallocation" of track sections in Zurich's main station. From 2009, the first of a total of 23 piers were built. The piers, which are a maximum of 16 metres high, are based on bored piles up to 45 metres long. The superstructure was built using a pusher frame, which was assembled in autumn 2011. A structural defect required the installation of a slab track from November 2013. This was necessary because six to eight tension cables had to be pulled in across the track above each of the 23 piers and fixed on the outside with anchor heads. The tension cables resting on the bridge trough had to be concreted in, which meant that a conventional ballasted track could no longer be installed due to the lack of space. Therefore, for the first time in Switzerland, a ballastless track of the LVT system was installed on a bridge.
SBB commissioned Rubi Bahntechnik for this project change in the mandate "Permanent way management and specialist for slab track". The big challenge was to find a technically feasible solution and to have it approved by the FOT. Furthermore, Rubi Bahntechnik was allowed to carry out the tendering of the work and to closely accompany the work as permanent way manager. Despite the project change, the bridges could start operation at the end of 2016.
Kunde: Netivie Israel and Israely
Aufgabe: Slab track manager (planning
Between 2012 and 2017, a new 23 km long railway line was built between Akko and Karmiel, north of Haifa (Israel). The heart of the line are the parallel 4.5 km long tunnels that cross under the Gilon Mountains. From May 2015, the railway technology in the two tunnels was intensively planned and installed. Among other things, a slab track of the LVT system, as used in Switzerland. The line successfully started operation in 2017.
Rubi Bahntechnik was responsible, among other things, for the planning and implementation of the slab track. The task included integral planning and coordination of all stakeholders in the area of the slab track in the tunnel as well as in the open air and the transition area to the ballasted track. This included all project phases (preleminary, detail and final design; same as SIA phases 21 to 53). Geological conditions are of central importance. This is because the settlement of EL Kurum is undercut with very little overburden. This can lead to problems with noise emissions and structure-borne noise. With suitable calculations it could be proved early on that the LVT (Low Vibration Track) system is suitable for use. Thanks to the wide range of expertise, it was possible to coordinate the system with the other plant types at an early stage. This enabled the project to be completed in the short implementation phase within the contractually agreed costs and on schedule.