The first of the two TBMs that will excavate the bulk of Cross River Rail’s 5.9km twin tunnels is passing factory acceptance testing, before being disassembled and transported by trucks to Cross River Rail’s Woolloongabba site, where it will then be reassembled. The second TBM will follow over December and January.
Crews remain on track to launch the TBMs from the Woolloongabba station site early next year.
The TBMs’ back-up gantries have been repurposed from the Sydney Metro project. The two TBMs have been refitted and refurbished. Each TBM weighs 1350 t, is 165 m long, measures 7.2 m in diameter with a 106 t cutterhead.
The TBMs will each tunnel under the Brisbane River to Albert Street station in mid-2021, before continuing on to the new Roma Street station and finally emerging at the project’s northern portal at Normanby. The deepest point of the tunnels will be 58m below the surface at Kangaroo Point, and 42m below the Brisbane River. The TBMs, during the 20-30m advancement per day, will install massive 4.2 t precast concrete segments to line the tunnels. The TBMs will generate 290,000 m3 of spoil. Click here and au/37 for the tunnelbuilder archive. Visit https://crossriverrail.qld.gov.au/. 48/20.
