17/02/2023

Perspective De La Gare Parc Des Expositions (C)Société Du Grand Paris Dietmar Feichtinger Architectes 800X450px Multiple fields

17/02/2023

Grand Paris Express: Fondasol Group selected to assist the contracting authority on the geotechnical aspects of the structures on Line 17 North

It's official: our companies Fondasol and Prodétis have been selected by the Société du Grand Paris (SGP) to provide, in a consortium, the geotechnical engineering Assistance to Contracting Authority mission for all the structures in the Line 17 North operation for the Grand Paris Express, between Le Bourget RER (excluded) and Le Mesnil-Amelot.

 

©perspective: Société du Grand Paris/Dietmar Feichtinger Architectes

Perspective Gare Lebourgetaéroport 2 1500Px (C)SGP Ateliernovembre

The mission in detail

Led by Fondasol's Major Design Projects department, the Fondasol-Prodétis consortium has been selected by SGP to carry out the following missions, concerning 26 underground and above-ground structures on Line 17 North:

  • Geotechnical consultancy missions in the PRO phase
  • Geotechnical expert assessment and second opinion mission in the EXE phase
  • Particular missions: one-off opinions and G5 mission
  • Technical meetings

 

©photo: Société du Grand Paris/Atelier Novembre

Mobilising a cross-disciplinary team of experts

More than ever, it is the  multi-disciplinaritythe complementarity and independence of Fondasol group that have been of such value in this mission.

The combination of geotechnical engineering expert assessments and structural studies by Fondasol's Major Design Projects department and Prodétis provides an overall mastery of the soil-structure interactions, for the structures of the above-ground and the underground structures alike.

Technically solid and experienced, the team that is working on this mission is familiar with the geotechnical issues liked to the design and construction of linear transport infrastructure and the related structures.

The team will be able to rely not only on a detailed knowledge of the project's local geological and geotechnical context, but also on the depth of the Group's expertise in the different fields concerned.

In-house specialists may also be brought in for a variety of cross-cutting subjects:

  • Geology
  • Hydrogeology
  • Auscultation and instrumentation
  • Earthworks and management of excavated material
  • BIM/GIS
  • Geotechnical investigations/laboratory tests/management of the core library

26 underground and above-ground structures concerned

  • 2 tunnels
  • 2 cut-and-cover trenches
  • 2 open trenches (Gonesse and Le Mesnil-Amelot)
  • 2 backfill operations (1.5 km)
  • 2 crossing viaducts (A1/A3 and RD 40)
  • 1 viaduct (3.1 km)
  • 1 connection to Aulnay operating centre (backfill over approximately 1 km)
  • 14 service structures

5 new stations on 20.5 kilometres of track

This new phase in the Line 17 North construction project will extend from Le Bourget RER station (excluded) as far as Le Mesnil-Amelot.


In concrete terms, this means 20.5 km of new track to be laid, including 15 km underground and 5.5 km above-ground, plus 5 new stations on this section.

Find out more