Expansion of the RBS Station in Bern
Bern
From housing to schools, from museums to infrastructure: exposed concrete is also part of Marti’s DNA. Discover with #ExposedConcrete a selection of our projects where technical precision meets architectural ambition.
The extension comprises two impressive caverns: the North cavern measuring 199 metres and the South cavern 209 metres in length. Both reach a height of 17 metres and a width of 23.8 metres. The technically demanding vault blocks are concreted in several phases, for which a special 260-tonne formwork carriage has been developed and built by Marti Technik AG in close collaboration with Marti Tunnel AG. One vault stage measures 5 metres. With 144,200 cubic metres of excavation and 43,466 cubic metres of cast concrete, these monumental spaces take shape. The construction presents particular challenges: variations in raw materials, fibre blockage in the reinforcement and a complex logistics chain with free fall of concrete of about 25 metres. These difficulties constantly require innovative solutions.
| Client | Regionalverkehr Bern-Solothurn RBS, Solothurn |
| Project Lead | Planergemeinschaft RBSverbindet |
| Contractor | ARGE Marti RBS Los 1.3 |
| Construction period | 2020 to 2029 (planned) |
Impressions
Facts & Figures
Key features
- Two large-scale caverns measuring up to 209 m in length and 23.8 m in width
- A complex vaulted structure, concreted in 5 metre stages
- Use of a specially engineered 260 tonne formwork carriage to achieve precise vault geometries
- Placement of large concrete volumes under challenging conditions caused by
- material fluctuations and fibres getting caught within the reinforcement
- Logistical challenge: a free fall of approx. 25 m requires adapted methods and continuous quality control
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