The Grand Paris Express is the largest urban project in Europe with the construction of 200 km of automatic lines, as much as the current metro, and 68 stations. The four new lines of the Grand Paris Express (15, 16, 17 and 18), as well as the line 14 extended to the north and south, will be connected to the existing transport network.
The new network, essentially underground, will cross the territories of Grand Paris to connect them to each other and to the capital. The civil works of lines 15, 16 and 17 have been in progress since 2017. The quantity of TBMs simultaneously digging reached 21 machines and equals the Doha record (Qatar).
The commissioning of all lines is scheduled for 2030 but some strategic lines have been activated for the Paris Olympic Games by 2024. Alongside this gigantic project, several existing lines are also extended such as line 11, line 12 and EOLE (RER E).
The biggest challenge among last years has been the construction of the underground station below CNIT La Défense, creating an underground cathedral. The settlement in the above buildings have been avoided with the H-Level System.
Instruments installed so far (end 2025):
• 20 kilometers of inclinometer casings
• 1200 in-place BH-Profile inclinometers
• 400 in-place MD-Profile 360, a part from them is installed at the top of existing underground galleries
• 1000 H-Level sensors
• 650 MPBX MultiPoint Borehole extensometers.
• 5000 strain gauges
• 150 total pressure cells
• 300 FLX-Rail sensors for dynamic railway monitoring
• 2 horizontal chains of LT-Inclibus 360 for securing the airport runways
