HS2 Launches First Giant Tunnelling Machine

Each machine operates as a self-contained underground factory – digging the tunnel, lining it with concrete wall segments and grouting them into place at a speed of around 15 metres a day. Each tunnel will require 56,000 precision-engineered, fibre-reinforced segments, which will all be made on site.

A crew of 17 people will operate each TBM, working in shifts to keep the machines running around the clock. They will be supported by over 100 people on the surface, managing the logistics and maintaining the smooth progress of the tunnelling operation.

More than 16,000 jobs and over 500 apprenticeships are already being supported by the project, which is set to transform transport links between Britain’s major cities, free up space on the rail network for more freight and local services and support the UK’s transition to net zero carbon emissions.

Chalk excavated from the tunnels will be used for landscaping once construction is complete, creating wildlife-rich chalk grassland habitats across 127 hectares of the southern Chiltern Hills.
source= https://railway-news.com/hs2-launches-first-giant-tunnelling-machine/

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