This project covers section of the new Line 15 between the stations of Pont-de-Sèvres and Saint-Denis-Pleyel (both excluded). It comprises:

  • 20km of new tunnel
  • 9 new stations
  • 21 new shafts for fire exit, ventilation and smoke extraction
  • 1 special structure: the back-station at Nanterre-la-Folie




setec tpi leads the Project Management Joint Venture and ensures the steering of the team. The design services range from the scheme design to the detailed design. These services cover:

  • Civil engineering of the project’s infrastructures: tunnel, stations, shafts and back-station
  • Building engineering elements and the operational design of the stations and the emergency exit shafts (power, plumbing, smoke extraction, …)

The stations’ and emergency shafts’ projects are managed entirely in BIM.




Design Project Management

Client : Société du Grand Paris

setec group design partners : setec bâtiment, terrasol, planitec btp, setec international, setec hydratec, setec ferroviaire

Joint-Venture partners : Systra, Architecture Studio, Wilmotte & Associés, Jean-Paul Viguier & Associés, Dubuisson Architecture, Périphériques architectes

Period : Novembre 2015 – Février 2019

©Wilmotte & Associés

In a Nutshell

9new stations
21new shafts

A complex technical project : La Defense station

The La Défense underground station represents a major technical challenge. Firstly, because it will be located underneath the Quatre Temps shopping centre, which requires the reinforcement of the foundations of this massive building structure with the help of 1,120 micro-piles, 250T each. Secondly, the logistics on site are very restrictive with the access of the materials and extraction of the waste undertaken by the same shaft (the “Démi-Lune” shaft), 250m away from the station and with a diameter of 30m.