HS2 completes first mile under Chilterns using 170m long ‘TBM’

The first 2,000 tonne, colossal tunnelling machine being used for the construction of the HS2 tunnels has successfully passed the one-mile mark.

The 170m long Tunnel Boring Machine (TBM), first launched in May, covered the first mile cutting via a mix of chalk and flint under the Chiltern hills, just out of London.

To read more and to watch a video …… HS2 completes first mile under Chilterns using 170m long ‘TBM’ | Rail Technology Magazine