The existing Bözberg tunnel between Frick and Brugg does not meet the new requirements for the clearance gauge (corner height 4.0 m) and will therefore be replaced by a new 4-metre corridor as part of the overall project.
The new 2.7 km long double-track tunnel runs parallel to the existing railway tunnel at intervals of 30 to 50 m. In the southern portal area, a loose rock section of 108 m will first be excavated with pipe umbrella stages. The remaining 2503 m will be excavated with a TBM-S ø 12.36 m. Five cross passages including rooms for the technical equipment are to be excavated to the existing tunnel, which will be extended as a service and rescue tunnel after completion of the new construction. The new tunnel will be constructed with two lanes, with a fixed carriageway and overhead conductor rail.
See TV-Report from Schweiz aktuell.
- Construction of the new tunnel along the existing main line
- Tunnelling in swellable sulphate containing rock
- Drifting in the catchment area of the thermal spring Schinznach Bad
- Realization 2015 - 2022
- Construction sum CHF 145 million
- EUR 132 million
- Total length 2,611 km
- diameter 12.36 m
- Outbreak volume 320'000 m³
- Geology Slope rubble, marl, siltstone and sandstone, limestone and claystone as well as sulphate rocks (gypsum skeuper, anhydrite group)
100 % Implenia as general contractor including execution project planning
Implenia Switzerland Ltd,
Infrastructure - Tunnelling
- Pre-cut with nail walls. Excavation and interior work including sealing; self-rescue measures, low-voltage system, track (slab track and ballast)
- Portal structures, commissioning of new construction tunnels, conversion of existing tunnels into service and rescue tunnels, implementation planning and site management.
- Machine-assisted driving of loose rock (pipe shield)
- mechanical driving with TBM-S and segmental lining.
SBB; infrastructure projects; CH-6002 Lucerne