The Metro Tunnel Project is the largest public transport infrastructure project in Victoria’s history. It will create a new rail line from Sunbury to Cranbourne/Pakenham, with twin nine-kilometre rail tunnels and five new underground stations at Arden, Parkville, State Library, Town Hall and Anzac.
Uni-span’s ULMA systems were engaged by the Metro Tunnel Project’s Tunnels and Stations contractor CYP Design & Construction at the site of the new Arden Station for the station box outer single sided walls, each 250m long and 7.85m high pours at 60kPa.
Inner walls at each end of the Arden Station box required a narrow SMK Frame to ensure the MSV (multi service vehicle) could service the tunnel boring machines with tunnel lining segments. This was achieved by introducing an additional top anchor at these locations, to ensure height to base stability.
Uni-span has provided solutions thus far to the eastern and western portals and 4 of the 5 new station sites.
MK System solutions has also been engaged to form the 7.0m diameter (14 sided) tetradecagon frame to allow Voids to be formed for the Project’s two Tunnel Boring Machines’ (TBMs) initial launch and subsequent breakthroughs.
ORMA was also used to form the complex geometry of the base slabs incorporating box outs and V-shapes at Arden and Anzac stations, and the western portal.
During 2020, MK Gantries will be utilised at the cavern stations for State Library and Town Hall in the CBD.
Other products used:
The Metro Tunnel will free up space in the City Loop to run more trains to and from the suburbs, by taking Melbourne’s busiest train lines through a new tunnel under the city.