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  Tunnelling on Legacy Way Project

  Legacy Way is Brisbane’s tolled 4.6km road tunnel that will connect the Western Freeway at Toowong (western end) with the Inner City Bypass (ICB) at Kelvin Grove (eastern end). The Transcity JV, formed by Ghella, Acciona and local BMD, has been awarded with the AU$ 1.5 Billion contract to design and build as well as operate and maintain the tunnel for 10 years by the client Brisbane City Council in October 2010. Legacy Way Project included 2x4.250ml of parallel TBM Double Shield driven tunnel of diameter = 12,4m: in the paper we analyze geology, spoil transport via conveyor belt in conveyor tunnel; innovative two component grouting on a large diameter hard rock TBM double shield, cross-passages, backfill, smoke duct, innovative system for TBM startup, and innovative system for the TBM disassembly.

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