It is a Robbins Double Shield with a diameter of 5,06 meters.
It is reported that it bored 12,2 km in 18 months `8 months ahead of schedule' and with a progress of '1.000 m per month' (this is what Robbins says).
The terror organization ISIS (Daesh / IS) were actually operating a Tunnel Boring Machine to dig a tunnel!
The Iraqi army corps have recovered it from the tunnel.
I think a good deal of the tunnel under the English channel has been dug with TBMs. But these last points were dug manually and there you go! Two sides meet each other under the sea!
Robbins Crossover TBMs are the adaptable solution to the world’s most challenging tunnel projects. This video explains how Robbins Crossover XREs, a hybrid of Hard Rock and EPB TBMs, work and why they are the solution for mixed ground tunnels...
Simply amazing!
26/02/2019 Ski, Norway Acciona Ghella Joint Venture (AGJV) are excavating on behalf of Bane NOR TBMs "Magda" and "Anna" from Herrenknecht AG