In order to cope with increasing traffic in the future, the municipal railway network
in Salzburg is being upgraded. For this purpose, the existing railway infrastructure between
Salzburg - Golling, Salzburg - Saalach Bridge/Freilassing and Salzburg - Strasswalchen will
be used and extended.
In this connection, 12 new railway stops, numerous bridges and underpasses, trough structures
and retaining structures have to be built or adapted. Furthermore, the section of Salzburg Main
Station - Saalach Bridge/Freilassing will be expanded into a triple-track line.
Along the whole section, the new tracks run parallel and in close vicinity to the existing
tracks. Consequently, all the work has to be done in consideration of the heavy traffic
experienced by the railway routes. |
BGG Consult is responsible for the geotechnical and hydrogeological consulting of all the
sections of the project. Based on subsoil investigations, geotechnical and hydrogeological
expert's reports were compiled that were necessary for the application of the construction
permit, and subsequently for the tender procedure.
During the tender preparation phase, intensive participation of BGG Consult was essential
due to the challenging condition of the subsoil. Numerous groundwater lowering measures as
well as building-pit securing measures had to be implemented.
During construction, BGG Consult is responsible for the following tasks: The geotechnical
supervision and evaluation of the project plan; The planning of building-pit slopes and
groundwater lowering measures; And finally, the preservation of the hydrogeological
evidence. |
Salzach Bridge:
It was a special challenge to construct a new bridge across the Salzach River, while keeping
two tracks operational for use. A complex construction procedure had to be conducted where
one single-track and one double-track bridge was built. Some of the river pylons had to be
fabricated below the existing bridge.
The loads of the structures are transferred via bored piles (Ø 120 cm) into the sustainable
moraine, which declines along the bridge from 10 m to 30 m below the top of the pile.
Accordingly, the pile lengths vary between 15 m and 35 m.
The building pit in the river is secured by sheet piles lowered down to the lacustrine clay,
which exists between the upper quartenary gravel and the moraine.
Further, construction is only possible in wintertime during low water periods.
Before the construction could be started, it was essential to secure the riverbed extensively
against flood damage, especially due to the reduction of the cross section area.
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