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).
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
China's Giant tunnel boring machines are used to excavate the ground using a circular cross section that drills through a variety of ground soil or rocky earth to produce subway tubes, tunnels for railways and many more.
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