First tunnel boring machine arrives for Grand Paris Express

The video discusses the arrival of a Tunnel Boring Machine (TBM) for the Grand Paris Express project. The TBM is over 100 meters long and 10 meters in diameter, capable of drilling at a depth of 55 feet below the surface at a rate of 10 to 12 meters per day. It will be used to construct a 2.2-kilometer tunnel connecting the Champigny operating center to the main tunnel of line 15 South in the Val-de-Marne region.

What is the length of the tunnel boring machine used in the Grand Paris Express project?

• 50 meters

• 75 meters

• 100 meters

• 125 meters

How wide is the tunnel boring machine in diameter?

• 5 meters

• 10 meters

• 15 meters

• 20 meters

At what depth can the TBM drill below the surface?

• 25 feet

• 70 feet

• 40 feet

• 55 feet

What is the daily drilling rate of the TBM?

• 10 to 12 meters

• 8 to 10 meters

• 12 to 14 meters

• 5 to 7 meters

What is the purpose of the TBM in the Grand Paris Express project?

• To build a new metro line

• To construct a connecting tunnel

• To create underground parking

• To renovate existing tunnels