The second-mile tunnel bore beneath Lengthy Itchington Wooden in Warwickshire marks the subsequent massive milestone for the Balfour Beatty Vinci (BBV) tunnelling group on the northern part of section one.
After working across the clock in shifts over seven months, Dorothy grew to become the primary on the HS2 mission to finish a tunnel drive in July 2022.
Since then the gantries of the tunnel boring machine, which weigh over 1,000 tonnes, have been introduced again by way of the tunnel and reassembled on the north portal.
The 10m diameter cutterhead, weighing 160 tonnes, was transported by highway throughout an intricate night-time operation in September.
Neil Johnson, Tunnels Supply Director for Balfour Beatty Vinci, mentioned: “This has been an intense 4 months for the 300-strong group, together with an intricate logistical operation to securely transport the TBM’s large cutterhead and tail pores and skin again to the north portal.
HS2’s senior mission supervisor for Lengthy Itchington Wooden Tunnel, Doug Barnett: “This TBM reassembly and relaunch is one other first for the HS2 mission.
“One yr after Dorothy launched for her first drive, she’s now set off for the second bore, and we look ahead to seeing the subsequent HS2 tunnel breakthrough in summer season 2023.”