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TBMs on the way to dig the Metro Tunnel

Four giant tunnel boring machines (TBMs) will build the Metro Tunnel and transform Melbourne’s transport network.

The mammoth machines which will build the project’s twin 9km tunnels have been ordered.

The 100m long machines will operate like moving factories as they travel deep beneath the city’s surface, with giant cutting heads burrowing through soil and rock before it’s transported via pipes to the surface.

Each TBM will head away from the city on the first leg of their journey before being retrieved in Kensington and South Yarra. They will then be dismantled and trucked back to their starting points to be relaunched towards the city.

Metro Tunnel