Mammoet has successfully completed the relocation of two tunnel boring machines and their components as part of the construction of a new metro tunnel in Melbourne, Australia.

The machines, weighing 660t each, were lowered into the site of the Metro Tunnel Project’s new Anzac Station 20m below street level, then relocated to their launch position underground. Transportation of the two tunnel boring machines took approximately three days and three nights each.

Mammoet firstly lifted each machine off the underground station floor using six 300t hydraulic jacks so that the 14 axle lines of SPMT in 4-file configuration could be positioned beneath it. After which the machines were transported slowly and carefully to the launch ramp where hydraulic jacks lifted each from the SPMTs.

Subsequently, the machines were jacked-down onto Mammoet’s 600t heavy-duty hydraulic push-pull skid system before being skidded forward to their final positioning location. Mammoet further assisted the client by moving and positioning a 57t thrust frame and 60t gantry, which were components of each tunnel boring machine.

The Metro Tunnel Project is the biggest public transport infrastructure project in Victoria’s history, delivering twin 9-km tunnels and five new underground stations through the centre of Melbourne.

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