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 drilling rate of the TBM in meters per day?

What is the length of the connecting tunnel that the TBM will drill?