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Metro Tunnel

Tunnel boring machines

Tunnelling update

Arden to Parkville

Two tunnel boring machines (TBMs) have been launched separately from the Arden Station site.

The first TBM, Joan, was launched from the Arden Station site in May 2020, and was followed by the second TBM, Meg, which launched in early June 2020.

In August 2020, TBM Joan broke through into the Parkville Station site. This completed the first of the twin tunnels from Arden to Parkville, with TBM Meg breaking through in the coming weeks.

Watch our Construction Manager Bored Tunnels – West, Adam Gorny provide a general overview about tunnelling from Arden to Parkville.

Domain to South Yarra

Two tunnel boring machines (TBMs) have also been launched separately from the Anzac Station site and are travelling towards the eastern tunnel entrance at South Yarra.

The first TBM, Millie, was launched from the Anzac Station site in April 2020, and was followed by the second TBM, Alice, in May 2020.

Watch our Construction Manager Bored Tunnels – East, Andreas Mindt provide a general overview about tunnelling from Domain to South Yarra.

Tunnelling in the CBD

Next year, following roadheader excavation of the tunnels through the CBD stations, TBMs will carve out the twin tunnels between Town Hall Station and State Library Station around 30-40 metres below Swanston Street.

Environmental management

The Metro Tunnel Project has a comprehensive environmental management system in place for the construction and operation of the new twin tunnels.

Watch our Environment Manager, James Hamilton, provide an overview about environmental management, including noise and vibration, during tunnelling.

Explaining the tunnelling process

In August 2019, as Joan the TBM prepared to launch towards Kensington, our Director of Tunnels and Underground Stations explained how tunnelling operations would take place on the Metro Tunnel Project.

Learn more about our TBMs