The tunnel boring machine completes work on line 17 of the Grand Paris Express
The Florence tunnel boring machine carried out its first mission by drilling a 3.4 kilometer tunnel between Bonneuil-en-France and Le Bourget for line 17 of the Grand Paris Express.
Leaving in December 2020 from the Flanders pit in Bonneuil-en-France, this all-terrain machine has been underground for more than a year and a half. During this time, the Florence borehole passed close to three structures and crossed the future Bourget Airport station. On May 17, 2022, it reached its end point at Le Bourget.
The 3.4 kilometer tunnel was dug at a depth of between 20 and 30 meters. On average, 10 to 15 meters of tunnel were traversed each day.
The machine was named in September 2020, in tribute to Florence Coquand, engineer at the Société du Grand Paris
Line 17 of the Grand Paris Express is thus taking shape. Once completed, the line will connect 9 stations from Saint-Denis Pleyel to Le Mesnil-Amelot in 25 minutes, facilitating travel for nearly 565,000 inhabitants.
The Florence tunnel boring machine will now be dismantled and transported to the current Grand Paris Express site at Triangle de Gonesse. From there, the machine will make a final trip to the Flanders pit.