The Land Transport Authority (LTA) has awarded the civil contract for the design and construction of Ang Mo Kio station and tunnels under the first phase of the Cross Island Line (CRL1) to Gammon Construction and Engineering Pte. Ltd – Bachy Soletanche Singapore Pte. Ltd. Joint Venture. Valued at $644 million, the contract will also cover addition and alteration (A&A) works to the existing Ang Mo Kio station along the North-South Line (NSL). When completed, Ang Mo Kio station will be an interchange between CRL and NSL.
2 Gammon Construction and Engineering Pte. Ltd has a strong track record of undertaking infrastructure and building projects locally and abroad. It was previously involved in the construction of Chinatown station along Downtown Line and is currently involved in the construction of Havelock station and Mayflower station along the Thomson-East Coast Line (TEL).
3 Bachy Soletanche Singapore Pte. Ltd, a specialist in geotechnical and civil engineering, is currently involved in the design and construction of the tunnel between Suffolk Walk and Novena Rise for the North-South Corridor. It is also involved in TEL projects such as Tanjong Rhu, Gardens by the Bay and Orchard stations.
4 Construction works for the CRL1 Ang Mo Kio station are expected to start in the fourth quarter of this year, with passenger service slated for 2030.
Engineering Highlights
5 CRL1 Ang Mo Kio station is an underground station located adjacent to the busy junction of Ang Mo Kio Ave 3 and Ang Mo Kio Ave 8. As it will be located close to the NSL viaduct and surrounding structures, LTA and the contractor will closely monitor the project’s progress and ensure that all works are carried out safely, with minimal impact to existing structures.
6 Deep excavation works for CRL1 Ang Mo Kio station will be carried out under challenging ground conditions, as the rock is typically weaker at the transition point between the Old Alluvium (predominantly soil-like material) to Bukit Timah Granite formation. This requires the use of specially-designed machinery to carry out the excavation works safely.
7 When completed, the station will have entrances that connect directly to different residential blocks, AMK Hub, Ang Mo Kio Integrated Transport Hub and Ang Mo Kio Town Garden East. Two of the new entrances will be connected to the station via underpasses across Ang Mo Kio Avenues 3 and 8 (see Figure 1). To ensure smooth traffic flow on the roads, these underpasses will be constructed using a “pipe-roofing and mining” method, where a box structure made of pipes will support the ground while mining works are carried out beneath the surface of the road. This method minimises disturbance to the surrounding roads, buildings and underground services, as compared to the more traditional method of open cut excavation from the ground surface.
