Brisbane advances vital traffic link Nov 2012
Transcity News Release
A second refurbished Herrenknecht TBM is launched ahead of schedule on the parallel drive of the Legacy Way traffic tunnel for the Transcity consortium in Brisbane, Australia.
TBM Annabell, which launched in August, is close to reaching the 1,000m milestone, while TBM Joyce is closing in on the first 200m of its 4.6km drive from the western Toowong launch site to Kevin Grove in the east.
Additionally the Transcity consortium, comprising Ghella of Italy, BMD Constructions of Australia and Acciona of Spain, reports 20,000 of the 38,700 segments needed to line the 12.4m diameter tunnels have now been produced. Each ring will consist of nine segments.
  • Second rebuilt TBM ready for Legacy Way launch

    Second rebuilt TBM ready for Legacy Way launch

  • Anticipated TBM progress rates Oct-Dec 2012

    Anticipated TBM progress rates Oct-Dec 2012

At their peak of excavation the two TBMs - which are the rebuilt and modified machines that were used to drive the 6.8km CLEM7 traffic tunnels under the Brisbane River three years ago - will progress at a rate of 15-20m/day.
"The TBMs from this project have been completely restored and modified to suit the construction conditions of Legacy Way," a Transcity spokeswoman spokeswoman told TunnelTalk.
Preparation works for controlled drill+blast activities

Preparation works for controlled drill+blast activities

Meanwhile, at the western worksite in Toowong, Transcity reports that piling to build retaining walls for the tunnel's entry and exit lanes is under way as are concrete pours to form the roof of the cut-and-cover section of the tunnel.
At the eastern worksite at Kevin Grove work continues on the portal in preparation for the realignment of the eastbound Inner City Bypass (ICB) lanes next year (2013), including controlled drill+blast activities to excavate hard rock in advance of construction of the cut-and-cover tunnel that will form the entry and exit portal to Legacy Way. The foundations for the ventilation station are also under construction.
Legacy Way, formerly known as the Northern Link, is a 4.6km road tunnel that will connect the Western Freeway at Toowong with the ICB at Kelvin Grove, providing an alternative route to local roads for traffic leaving the Western Freeway and travelling to and from the ICB. When it opens, Legacy Way will reduce, by up to 44%, the peak hour travel time of journeys from the Centenary Bridge to the ICB.
The project is Brisbane's third major road tunnel, following the 6.8km Clem Jones (CLEM7) Tunnel and the recently-opened Airport Link. It forms the fourth part of an overall transport plan known as the TransApex ring road program.
References
Rebuilt TBMs launch on Brisbane traffic tunnel - TunnelTalk, August 2012
Brisbane awards Northern Link highway - TunnelTalk, September 2010
Northern Link plan of attack - TunnelTalk, September 2010
Brisbane's Airport Link powering ahead - TunnelTalk, June 2010
Buried end for Airport Link TBMs - TunnelTalk, January 2011
Brisbane completes Airport Link excavation - TunnelTalk, July 2011

           

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