Singapore’s Woh Hup, in joint venture with Shanghai Tunnel Engineering and Switzerland’s Alpine Mayreder Bau, is favourite for a US$93M contract to build Serangoon interchange station, and running tunnels, on the third phase of Singapore’s Circle Line.
Phase three involves the construction of a 5.7km long, US$700M extension from Upper Paya Lebar Road and Bartley Road to Marymount Road. It also includes the construction of five underground stations. Construction is due to start later this year for completion by early 2008.
The Woh Hup team submitted another three cheaper alternatives that were all below the group’s closest rival, Japan’s Penta-Ocean Construction.
The return of bids coincided with an invitation to contractors to apply by 25 July for prequalification for phases four and five of the Circle Line. Plans call for the design and construction of about 14km of tunnel plus ten underground stations. The tunnels will be 5.8m i.d. and built using both slurry and EPBMs.
Phases four and five are split into three contracts: Contract 854 – construction of 5.3km of twin bored tunnels and 320m of cut and cover tunnels, plus three underground stations; Contract 855 – construction of about 4km of twin bored tunnels and 350m of cut and cover tunnels, together with civil works at three underground stations and architectural and building services works at four underground stations; and Contract 856 – construction of 3.4km of twin bored tunnels and 640m of cut and cover tunnels, with civil works at four underground stations, plus architectural and building services works at five underground stations.
The construction of the US$3.88bn Circle Line is in five phases, with construction of the first three phases alone estimated at US$2.08bn. Phase one, running from Dhoby Ghaut to Stadium Boulevard, started last October with completion due in 2006. Phase two, which extends the line to Upper Paya Lebar Road, started earlier this year for completion in 2007. The third phase will start later this year and finish in 2008. Overall completion of the Circle Line is due sometime after 2010.
