Metro Grand Paris Express, Line 17- Lot 3
Grand Paris Express – Line 17 North, Lot 3
The Grand Paris Express is a major metro expansion project designed to improve transport connections across the Paris region. Metro Line 17 North will connect the northern Paris region with Paris-Charles de Gaulle Airport and Le Mesnil-Amelot. Lot 3 – Underground Northern Section comprises approximately 6.2 km of underground tunnel passing beneath the airport, including runways, taxiways and existing railway infrastructure. The construction package also includes one major underground station, Aéroport Charles de Gaulle 2 TGV, seven technical and service structures, and end access trenches. The tunnel excavation was completed by Virginie, an Earth Pressure Balance (EPB) tunnel boring machine.
Amberg Engineering was commissioned by RAZEL-BEC (FAYAT Group), lead company of the construction consortium, to contribute specialist underground engineering expertise to Lot 3. Amberg's scope included engineering design and monitoring activities, supporting the delivery of complex underground works beneath one of Europe's busiest transport hubs. Construction in this environment requires careful consideration of ground conditions, settlement risks and the operational constraints of existing airport infrastructure, as well as close coordination between the project teams.
The Lot 3 construction works are being delivered by a FAYAT Group consortium led by RAZEL-BEC, together with its sister companies Sefi-Intrafor and FAYAT Énergie Services. The client is Société des grands projets. The overall Line 17 project represents an investment of approximately €2.6 billion, with the full connection to Le Mesnil-Amelot currently targeted for 2030.
Picture Gallery
Photos: © RAZEL-BEC
