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Constructing the tunnels

Tunnelling between North Melbourne and Kensington, and North Melbourne to the CBD

Two tunnel boring machines (TBMs) are assembled in the station box at the Arden Station site. The TBMs are launched separately, and tunnel towards the new tunnel entrance at Kensington.

During tunnelling, the TBMs pipe the excavated material (slurry) back to the Arden Station site and line the new tunnel with curved concrete segments.

The TBMs arrive at Kensington and are transported back to the Arden Station site. The TBMs are reassembled in the station box and relaunched towards Parkville, before tunnelling towards the CBD.

Tunnelling between the Domain Precinct and South Yarra, and the Domain Precinct to the CBD

Two TBMs are assembled in the station box at the Anzac Station site in the Domain Precinct (Domain). The TBMs are launched separately and tunnel towards the new tunnel entrance at South Yarra.

During tunnelling, the TBMs pipe the excavated material (slurry) back to site at Edmund Herring Oval in Domain, and line the new tunnel with curved concrete segments. The TBMs arrive at South Yarra and are transported back to the Anzac Station site.

The TBMs are reassembled in the station box and relaunched towards the CBD, under the Yarra River.