STRABAG UK reposted this
Today our tunnel boring machine (TBM) Caroline, completed a 5-mile tunnel drive under London, reaching the Green Park Way vent shaft in Ealing. The machine is 1 of 4 giant tunnelling machines being deployed to build the railway’s Northolt Tunnel. The 2,050-tonne TBM broke through into an underground reception can filled with foam concrete, and installed the 4,217th concrete tunnel ring to complete the 5-mile stretch of tunnel. Watch the full video here 🎥- https://ow.ly/sVo850VtK7E Skanska Costain STRABAG Joint Venture