HS2 TBM cutterhead's overnight journey to start second dig

After HS2’s first tunnel breakthrough by tunnel boring machine “Dorothy” at the south portal site in the UK, the front part of the TBM has been dismantled and transported back to the tunnel’s north portal in a 24/7 intricate operation, managed by the plant and logistics team at HS2’s contractor Balfour Beatty VINCI (BBV).

The cutterhead from HS2’s TBM Dorothy being moved on a 12m long, 48-wheel self-propelled trailer

26 September 2022
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The cutterhead, weighing 160t and with a 10m diameter, was moved overnight.

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