Unsupported browser

For a better experience, please update your browser to its latest version.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

First TBM on way for Sydney Metro

The first of five TBMs is on its way to start boring on Australia’s biggest public transport project.

The 150m long TBMs will launch at Marrickville later this year and start tunnelling towards the new Waterloo Station - then under the Sydney central business district via new metro stations at Central, Pitt Street and Martin Place, before finishing at Barangaroo.

Altogether, the five TBMs will deliver new 15.5km twin metro railway tunnels from Chatswood to Sydenham, including under Sydney Harbour.

Taking six months to build, the double shield TBM will advance 1.7m each time and each cutterhead has 38 hardened steel cutters – weighing up to 400kg each – which will need to be replaced about every one-to-two weeks.

Two TBMs will dig about 8.1km from Marrickville to Barangaroo and two will cut about 6.2km from Chatswood to Blues Point. The fifth TBM has been specially designed to bore about 1km of tunnels under Sydney Harbour.

They are expected to tunnel about 120m a week on average.

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Links may be included in your comments but HTML is not permitted.