Below Rail Infrastructure, Engineering, Passenger Rail

TBM Sandy breaks through at Bayswater

Tunnelling is complete on the Forrestfield-Airport Link, part of the Metronet project in Western Australia.

On April 20, tunnel boring machine Sandy broke through at the Bayswater dive structure. WA Premier Mark McGowan said that the completion of tunnelling is a “major milestone” for WA.

“While Western Australia has been grappling with COVID-19, TBM Sandy and the project team have been continuing to work on this incredible project for Perth.”

The breakthrough ended 900 days of tunnelling under Perth Airport and the Swan River, creating 16 kilometres of tunnels, two twin 8km tunnels.

Now that tunnelling is finished, track will start to be laid from July 2020. The track slab is half installed while construction and fit out of the station buildings continues.

“In times like these it’s important we continue to progress projects that will provide work for local businesses and keep workers in their jobs, ultimately supporting the State’s wider economy,” said McGowan.

The tunnels, made with 9,000 tunnel rings comprising 54,000 locally made concrete segments, link three stations, Forrestfield, Airport Central, and Redcliffe to the wider rail network.

WA Transport Minister Rita Saffioti thanked those who have worked on the project so far.

“In July 2017, Premier Mark McGowan and I were at the Forrestfield Station site to mark the start of tunnelling on the Forrestfield-Airport Link,” she said.

“Thank you to the tunnelling team and other workers who delivered TBM Sandy to her destination and helped achieved this major milestone.”

The $1.86bn Forrestfield-Airport Link provides over 700 jobs in Western Australia, and is one of six Metronet projects underway in 2020.

The tunnelling for the Forrestfield-Airport Link was conducted by a joint venture of Salini Impregilo and NRW Civil and Mining which won the design and construct contract, along with a 10 year maintenance contract, in April 2016.

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