ABSTRACT
Once the Cross City Tunnel (CCT) Project in Sydney is finished, the Joint Venture of Baulderstone Hornibrook and Bilfinger Berger (BHBB CCT JV) will have sprayed over 12,000 m3 of steel fiber reinforced shotcrete to produce the tunnel lining. With more than 50% of the tunnels excavated and supported, discussions about limit state values in the specifications and research into the use of new materials (and their approval) are ongoing. This paper is approached from a contractor’s perspective on how this situation can be avoided, or at least how any problems can be minimised and solutions be found more efficiently in the future.
