TransportationCentral Subway
A 3.1-mile underground extension of the Market Street subway, delivering twin bored tunnels, three underground stations and a cavern beneath an operating city centre.

Metro-scale station caverns and twin running tunnels on Australia’s largest urban rail programme.
Deep cavern station boxes, cross passages and running tunnels designed for Sydney Metro.
Working in sandstone with variable cover, the team designed primary support that balanced excavation sequence, ground movement and construction programme. Our engineers provided on-site construction phase engineering, instrumentation design and interpretation, and specialist shaft and excavation support design.
