INFRASTRUCTURE

HS2 tunnelling in London passes the first milestone

HS2’s first two tunnel boring machines (TBM) in London, Sushila and Caroline, have completed the first mile of twin-bored tunnel in the UK’s capital.

 One of HS2's London TBMs placing a tunnel segment

One of HS2's London TBMs placing a tunnel segment

Since launching in November 2022, the 2,000t TBM have installed over 847 tunnel rings each, made up of 5929 concrete segments. The tunnel being constructed by Sushila is the downline and will be where...

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