This underground infrastructure project, which is 55% financed by Société du Grand Paris, will help to relieve congestion on Line 13, improving travel conditions and access to Paris for people living in the northern suburbs.
The consortium will be responsible for constructing:
- A 2.2-kilometre tunnel linking Clichy-St Ouen and Pleyel, including a tunnel that links to the train maintenance and marshalling zone.
- The Mairie de St Ouen station.
- Four ancillary structures, including reinforcing the infrastructures of line C of the RER (Regional Express Network).
The consortium will lay a strong emphasis on sustainable development. In particular, it will focus on limiting nuisances in a very dense urban environment. All excavated materials will be evacuated by river, for instance, to avoid disrupting road traffic in the towns concerned by the project.
The project, which will be carried out with an 80 metre long earth pressure balance tunnel boring machine, includes several major technical challenges, such as taking account of the diversity of soils along the route of the tunnel and the reinforcement of the infrastructures of line C of the RER, beneath which the connecting tunnel to the train maintenance and marshalling zone will pass. To meet these challenges, the consortium will analyse all the data collected from the TBM and resulting from monitoring on the surface in real time in order to have the capacity for immediate response.