Sydney Metro City & Southwest
Sydney Metro is Australia’s biggest public transport project. It will transform Sydney, delivering more trains and faster services for customers across the network.
Sydney Metro City & Southwest extends the new metro network from the end of Sydney Metro Northwest at Chatswood, under Sydney Harbour, through new railway stations in the CBD and west to Bankstown – a total of 66 kilometres of metro rail.
John Holland, as part of the JHCPBG joint venture (John Holland CPB Ghella), will deliver the $2.81 billion contract to deliver the Stage 2 Tunnel and Station Excavation (TSE) Works.
The design and construct contract includes 15.5 kilometre twin railway tunnels between Chatswood and Sydenham, running under Sydney Harbour and through the CBD. Five purpose-built tunnel boring machines (TBMs) will be procured, including four double-shield, hard-rock TBMs and a mixed-shield slurry TBM, specially designed to excavate in the under-harbour ground conditions.
Complex underground structures will be built for six new metro stations in Crows Nest, Victoria Cross, Barangaroo, Martin Place, Pitt Street and Waterloo.
The works include excavation of two dive sites at Chatswood and Marrickville, a rail crossover cavern at Barangaroo and 57 cross passages along the alignment to connect the two tunnels. A bespoke precast facility will also be set up next to the Marrickville dive site to produce more than 99,000 concrete tunnel-lining segments.