Скачать с ютуб How engineers are building a tunnel ventilation shaft for the HS2 tunnels in London в хорошем качестве

How engineers are building a tunnel ventilation shaft for the HS2 tunnels in London

The Westgate ventilation shaft, in Ealing, is one of five shafts along the Northolt Tunnel route of HS2. The ventilation shaft is a vertical opening that connects the tunnels to the surface and open air. It regulates air quality and temperature in the tunnel, provides access for emergency services, and allows smoke to be extracted in the event of a fire. The team are currently half way down the shaft as they excavate London clay and are now at the spray concrete lining phase which involves digging one metre sections of grounds and spraying concrete onto the walls. For more information about the construction of HS2 visit www.hs2.org.uk/building-hs2 Follow us on social media: Twitter:   / hs2ltd   Instagram:   / hs2ltd   Facebook:   / hs2ltd   LinkedIn:   / high-speed-two-hs2-ltd   #HS2 #Construction #Tunnelling If you have a question about HS2 or our works, please contact our HS2 Helpdesk team on 08081 434 434 or email [email protected].