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  Construction of Central-Wan Chai Bypass Tunnel in Hong Kong Harbour : Surface Challenges and Underground Solutions

  The Central–Wan Chai Bypass (CWB) project involves the construction of a 3.7 km long dual 3-lane road tunnel running along the north shore of Hong Kong Island. The strategic route was adopted with the aim of alleviating traffic congestion between the east and west of the densely populated Island metropolis. This is a mega-sized project which commenced in December 2009 and is now proceeding in full swing at an estimated cost of HK$36 billion (approximately EUR€3.96 Billion). This paper discusses the temporary reclamation which facilitated construction of the cutand-cover tunnel sections within the restricted space of typhoon shelter together with construction of a large span trinocular mined tunnel located under the seabed and the existing Cross Harbor Tunnel respectively, and removal of temporary reclaimed land for restoration of the seabed upon completion of tunnel construction.

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