Here's how the tunnel boring machine, or TBM, works: As the 200-ton TBM moves forward, a round cutter head studded with titanium teeth grinds into the tunnel face and splits large chunks off the rock.
Following its 5-mile drive underneath the capital, HS2 lifted Tunnel Boring Machine (TBM) ‘Sushila’ out of the ground at the ...
Using a model of the tunnel boring machine (TBM), he explained that the final phase of debris removal was underway, and multiple teams were working continuously to expedite the process.
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