However, HS2 Ltd said that the designs are yet to be finalised and would still be subject to internal structural and safety checks. It is anticipated by HS2 Ltd that 10 TBMs will be procured for excavation of the 39km of twin running tunnels that comprise Phase I of the project. A joint venture between Costain, Skanska and Strabag is delivering the Euston tunnels and approaches for HS2 …

The SCS JV – comprising Skanska, Costain and Strabag – won the contract for the Euston tunnels and approaches in 2017.

HS2 Ltd has repeatedly argued that the tunnels will be constructed safely and that specific engineering challenges will be worked out during the detailed design phase.

Twin 13-mile tunnels will take 360 km/h trains out of London via a new rail station at Old Oak Common, and at the southern end a tunnel portal will be built on the site of the old carriage sheds. In March last year, the tender shortlist for Phase One of the main civil engineering works contracts, comprising bridges, tunnels, embankments and viaducts, was released.

The claim relates to latest design specifications given in updates to residents.

HS2 will deliver 11 new platforms at Euston station in two phases, more than doubling the station’s capacity and linking it to the Euston Square tube station. Two smaller diameter 8.25m–8.45m machines will be procured by the SCS JV for excavation of the 7km-long Euston Tunnels between the route’s southern terminus at a redeveloped Euston Station, and Old Oak Common Station – both in London. A woman has lost her High Court challenge over proposals to create tunnels near Euston station as part of the controversial HS2 rail scheme. Local resident Hero … The nine-month demolition of the old Euston carriage sheds paves the way for specialist tunnelling teams to arrive on site next year.

HS2 completes the demolition of the former carriage sheds at Euston station, revealing the site of the approach tunnels for the new high speed rail link’s London terminal.

HS2 work to demolish former carriage sheds at Euston station has been completed, revealing the full scale of the approach tunnel for the new high-speed rail link’s London terminal for the first time.