Singapore’s Land Transport Authority (LTA) awarded two civil contracts for the design and construction works of the Cross Island Line Phase 1 (CRL1) at a combined contract value of SGD 766 million (USD 565 million).
SGD 320 million (USD 236 million) is the value of the first contract awarded to Hock Lian Seng Infrastructure for the design and construction of Aviation Park station and tunnels.
The company was previously involved in the construction of Kim Chuan depot for Circle Line (CCL) and Marina Bay station along CCL. It is currently involved in the construction of Maxwell station along the Thomson-East Coast Line (TEL).
The construction works for the Aviation Park station are expected to start in the first quarter of 2022, with passenger service expected to begin in 2030.
The civil contract for the design and construction of the bored tunnel between Tampines North and Defu stations was awarded to Nishimatsu Construction at contract value of SGD 446 million (USD 329 million). The contract includes the construction of a facility building with underground basements to cater to the electrical and mechanical requirements of CRL1.
Nishimatsu Construction Co. is currently involved in the construction of Gardens by the Bay station on TEL and Keppel station on the CCL.
A large-diameter Tunnel Boring Machine (TBM), measuring about 12.6 metres in diameter, will be used to construct a single 2.9-km long tunnel with two tracks. This will be the largest tunnel boring machine ever to be deployed in Singapore and it is expected to increase work productivity and reduce manpower requirements. The tunnel will be constructed at an approximate depth of 35 metres below ground level and is almost 50 metres underground at its deepest.
The construction works for the bored tunnel between Tampines North station and Defu station are expected to start in December 2021.
For CCL1, LTA has awarded this year the contract for Loyang station and tunnels, Ang Mo Kio station and tunnels, and the tunnel contract linking Aviation Park and Loyang stations.
The CRL1 will be 29 km long served by 12 stations from Aviation Park to Bright Hill serving the existing and future developments in the eastern, north-eastern and western corridors, linking major hubs such as Jurong Lake District, Punggol Digital District and Changi region.
The Cross Island Line will Singapore’s longest fully underground line with a length of 50 km. the project will be implemented in different phases and studies on the details of subsequent CRL phases are ongoing.