Austrian construction firm Alpine has completed the first of six subway tunnels for the Singapore Downtown Line.
Alpine is currently building six underground train tunnels and three stations for the Singapore Downtown Line.
The company's tunnel drill recently completed drilling a tube at 93m per week with a diameter of 6.6m between Tan Kah Kee and Sixth Avenue stations.
Singapore's Land Transport Authority (LTA) awarded two civil contracts, including the C917 and C918 sections worth S$670.74m (€322m), to Alpine in 2009 for its under-construction Downtown Line Stage 2 (DTL2) project.
The S$320.7m (€154m) deal under the C917 contract section included the construction of the King Albert Park and Sixth Avenue stations, with S$50.04m (€168m) C918 for Tan Kah Kee Station.
Contracts for the design and construction of stations and tunnels along the 40km Downtown Line were provided in three stages.
Two sections of DTL2 included construction of three new metro stations and single-track metro tunnels with a length of 5.72km (tunnel boring machine) and 445m (cut & cover).
The first stage of the Downtown Line is expected to be completed in 2013, while the second and third stages are scheduled to be completed in 2015 and 2016 respectively.
Stage 2 of the Downtown Line, including the Bukit Timah Line, has a total length of 16.6km with 12 underground stations.
As well as building two sections of the Downtown Line Stage 2, Alpine has also provided 12km of subway tunnel and four subway stations for Singapore's Metro Circle Line.
Downtown Line Stage 2 is expected to be completed in 2015.
Image: Alpine has completed the first of six subway tunnels for the Singapore Downtown Line Stage 2 project. Photo: courtesy of Alpine.