On June 21, 2017 the TBM breakthrough of the 3.2 km long Belchen rehabilitation tunnel (Switzerland) was celebrated after 16 months of excavation. The rehabilitation tunnel will serve as a third tube in addition to the existing Belchen motorway tunnel on the N2 between the Härkingen motorway junction and the city of Basel.
ILF Consulting Engineers was commissioned to provide the design (tender design to detailed design) and site supervision services for the tunnel.Following the completion of the rehabilitation tunnel, the refurbishment of the existing tunnel tubes is now scheduled to get underway. On June 22, 2017 ILF and its partners were awarded the design contract (conceptual study to permit application design).
Link to a short film on the breakthrough: https://youtu.be/Qj_GyEzrGms