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Metro Tunnel

Yarra River geotechnical investigations animation

Transcript

[Animation of the Melbourne Metro project alignment]

Geotechnical investigations provide critical data about ground conditions.

Investigation work is continuing to help plan how the tunnels and stations will be built.

[Map shows borehole locations completed along the project alignment and many more borehole locations still to be completed]

[Footage of an investigation site in the CBD]

A drilling rig creates boreholes approximately 100mm in diameter and up to 50 metres in depth.

This testing is supported by site surveys and other preparatory works.

[Animation shows a barge in the Yarra River drilling boreholes at multiple locations]

The next stage of investigations involves assessing ground conditions under the Yarra River.

This information is crucial to guide the operations of the Tunnel Boring Machines (TBMs).

[Animation shows a barge in the Yarra River drilling boreholes at multiple locations]

TBMs will create the twin tunnels under the Yarra River at a depth of approximately 11 metres.