LTA awards contracts worth $599m for Cross Island Line tunnels and power supply system
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The twin tunnels will run beneath key infrastructure, such as the Sungei Ulu Pandan canal.
ST PHOTO: JOYCE FANG
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SINGAPORE – Rail tunnels, each running a length of 1.4km, will be constructed to link the future Maju and Clementi stations in the second phase of the Cross Island Line (CRL).
The twin tunnels will run beneath key infrastructure, such as the Sungei Ulu Pandan canal.
The Land Transport Authority (LTA) on Aug 15 said it has awarded a contract worth about $199 million for the design and construction of these tunnels, as well as a separate contract of about $400 million for the provision of the CRL’s power supply system.
The tunnels connecting Maju and Clementi MRT stations will be designed and built by the Singapore branch of Chinese construction firm Sinohydro Corporation. The contract is the last of nine civil contracts LTA has awarded for the second phase of the CRL, which is being built in three stages
Sinohydro is involved in the construction of the Pasir Ris East and Clementi CRL stations. The firm also built the Thomson-East Coast Line’s Napier station.
LTA said an underground excavator called a slurry tunnel-boring machine will be used to build the tunnels as the area is mainly made up of hard sedimentary rock.
Real-time monitoring and safety measures will be in place during the tunnelling work. Steps will also be taken to ensure that the ground is stable, construction is safe, and the impact on people and infrastructure nearby is minimised, said LTA.
Construction of the tunnels is expected to begin in the last three months of 2024.
The second contract for the CRL’s power supply system was awarded to a consortium comprising transport solution provider Siemens Mobility and Concord Corporation, which specialises in electrical solutions.
The firms will design, supply, install, test and commission the CRL’s power supply system, which will cater to the high-capacity MRT line, said LTA.
Siemens Mobility had worked on the Downtown Line’s power supply systems.
It is now rolling out the power supply systems for the Jurong Region Line, the Downtown Line extension comprising Xilin and Sungei Bedok stations, the Circle Line extension between the HarbourFront and Marina Bay stops, and the North East Line extension connecting Punggol station to the new Punggol Coast stop.
Siemens Mobility was also awarded a contract for the CRL’s overhead conductor rail system, which supplies electricity to trains.
Concord Corporation had been involved in the installation of the Circle Line’s power supply system, as well as the replacement of the power supply system and upgrading work on the North-South and East-West MRT lines.
The CRL will be Singapore’s eighth MRT line, serving Singapore’s east, north-east and west.
Announced in 2019, the first phase of the fully underground line spans 29km, with 12 stations from Aviation Park in Changi to Bright Hill in Sin Ming. Construction is under way and is expected to be completed by 2030.
The 15km second phase, comprising six stations from Turf City to Jurong Lake District, will be completed by 2032. A 7.3km CRL extension spanning four stops from Punggol to Pasir Ris will also be done by 2032.
Engineering studies for the third phase of the line are continuing. This section will serve the Jurong Industrial Estate and likely comprise at least four stations between Jurong and Tuas.
