This consortium of companies from French-speaking Switzerland was supported by an association of companies comprising MARTI TS/ISR Injectobohr/WALO TS/JPF TS & SIF to carry out the special works.
The works to be carried out are:
- Excavation area formed from secant piles on the station square, to create the future IMPG multi-modal platform beneath the station’s north square
- Plunge columns for the creation of this platform
- Secant piles, to the south, to divert the M1 metro, which remained in operation during the worksite
- Micropiles for the temporary bridges, required to keep the station’s eight tracks running during creation of the three underpasses
- Underpinning micropiles to support the station building and the classified metal framework
- Berlin-type walls for the underpasses
- Micropiles and anchors to support the south car park (under the tracks) during its change of use
This is a project posing numerous challenges for the worksite team: an urban worksite which is the second-largest station in the French-speaking part of Switzerland – a station which needs to remain in service throughout the works, meaning that a maximum level of safety will be required to guarantee our employees’ safety as well as that of users. Finally, as a city-centre worksite, noise pollution will need to be minimised in order to limit the inconvenience caused to local residents by our work.
The special works should take around three years.