CFF Chemins de fer fédéraux suisses SA
Design 2011 - 2013
Enabling works 2013 - 2014
Works on the Rhône side 2014 - 2015
Works on the mountain side 2015 - 2016
- MPAIC, PRA (partner)
- Bureau Impact SA
- Ziegler Consultants
- G Rey-Bellet (sub-consultant)
Montant des travaux
The aging 489 m long St-Maurice tunnel is one of the obstacles which needed to be overcome to allow double-decker trains to run on the line from St-Maurice. The tunnel is characterised by its root in the St-Maurice train station, and its integration in the Dufour fortress to the north.
The project combines the remediation of the existing tunnel alongside the required enlargement, which was achieved through a significant lowering of the longitudinal profile in order to preserve the northern portal, which is heritage listed.
The works have been carried out over half of the profile at a time, using a protection screen.
The cut and cover section at the St-Maurice portal was constructed above the existing structure, which was demolished during a high impact shutdown period, which required trains to be stopped over a weekend.
Civil engineering services with specialists and railway technology coordinator, SIA stages 32 to 53.