Industry NewsTransportationTunnel Boring

Excavation work reaches milestone on Sydney Metro project

Sydney Metro reported that excavation of the station cavern of Sydney Metro West’s Hunter Street Station is 30 percent complete as excavation works continue on this future CBD transport hub.

The future station will be built 30 m (100 ft) underground and excavation is being completed with three roadheaders working at the site, Sydney Metro reported.

Each roadheader weighs up to 120 t (132 st) and will be used to excavate the Hunter Street Station cavern and turnback tunnels. The turnback tunnels to the east of the new station will allow trains to turn around before travelling back towards Westmead.

More than 149 kt (164,000 st) of dirt have been excavated by the roadheaders so far, and the largest area of the cavern that has been excavated is 235 m2.

As the roadheaders complete excavation on the station cavern and associated tunnels, two tunnel boring machines will be launched at The Bays in mid-2024, to carve out the 3.5-km (2.2 miles) twin rail tunnels below Darling Harbour to Hunter Street.

When Sydney Metro West opens, passengers will be able to use an underground walkway to connect to metro services on the Metro North West Line and City & Southwest line at Martin Place.

Further connections to the Sydney light rail and train network will also be minutes away on George Street and at Wynyard Station.

Sydney Metro West will double rail capacity between Greater Parramatta and the Sydney CBD, linking new communities to rail services and supporting housing supply, transforming Sydney for generations to come.

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