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The Project 

The Brittany – Loire Valley high-speed rail project involved building a new line to extend the existing Paris – Le Mans high-speed line to Rennes to reduce travel time between Paris and Rennes (and Brittany more widely), as well improve transportation links to Angers and other destinations (in the Loire Valley).
In 2011, after a call for tender, Réseau Ferré de France (RFF, the company owning and operating the French rail network before its reorganization as SNCF Réseau) commissioned Eiffage Rail Express (ERE) to manage the final design, construction, maintenance and funding of the new line, over a 25-year period.
Working alongside ERE since the launch of the RFF bid process, setec was asked to design five of the seven work packages.

Challenges

Client
Eiffage Rail Express (ERE)

Period
Design: 2011 – 2014
Construction: 2013 – 2017
Commissioning: July 2017

Challenge
A design and engineering assignment as part of the GIE CLERE consortium.

The Assignment

setec provided general design and construction management for 147 km of the project in the following technical areas:

  • geometric design for the high-speed line, links to the existing railway network and restored links to the roads and motorways crossed by the high-speed railway line,
  • complex embankments and earthworks,
  • sanitation, drainage and hydraulics for the rail and road infrastructures,
  • viaducts and rail/road bridges,
  • environment: protected species, regulatory studies and environmental integration,
  • carriageways and facilities for the roads and motorways crossed by the high-speed line.

    setec also handled the following tasks:

  • General supervision of the rail facilities over the entire project, including signaling, telecommunications and electrification
  • Design and engineering of the rail lines (on half the route)
  • Design of the works and maintenance sites
  • General studies on interurban transportation: multimodal models, high-speed line capacity and economic assessments
  • Geographic information system (GIS): database design and production, and data generation for reports and regulatory documents
  • Shop drawings (34 km of high-speed line, 32 km of roads, and structures in complex terrain)