Cross Island Line construction starts in Singapore

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Singapore’s Land Transport Authority (LTA) has officially started construction of Phase 1 of the Cross Island Line (CRL). The Cross Island Line (CRL) is a new fully underground automated high capacity rapid transit line.

A groundbreaking ceremony, officiated by Singapore’s Minister of Transport S Iswaran, took place at the future CRL Bright Hill station on 18 January.

The full CRL will be Singapore’s eighth and longest fully underground Mass Rapid Transit (MRT) line. When fully completed, the total length will be over 50km. The line will accommodate existing and future developments in the Eastern, Western and Northeastern corridors, connecting major hubs such as Jurong Lake District, Punggol Digital District and Changi.

Built in 3 stages, 29 km long Phase 1 It consists of 12 stations from Aviation Park to Bright Hill. It connects to the East-West Line at Pasir Ris Station, the North-East Line at Hougang Station, the North-South Line at Ang Mo Kio Station, and the Thomson-East Coast Line at Bright Hill Station.

Construction of Phase 1 is expected to be completed by 2030.

The LTA is phasing tenders for CRL Phase 2, comprising six stations from Turf City to Jurong Lake District, with engineering studies underway for Phase 3.

A large bore tunnel boring machine (TBM) will be used to construct tunnels for various sections between CRL stations, such as between Aviation Park and Loyang stations.

The 12.6m diameter TBM excavates the ground once to construct the tunnel. This tunnel has two tracks. This will be his largest TBM to be deployed on the LTA rail project.

Construction of a toll transfer link to the existing Pasiruris station on the Tozai Line is also underway. Due to site restrictions on track viaducts, specialized equipment such as low-head cranes are deployed for construction work such as underground walls.

Rectangular TBM will be used for underground linkway construction at CRL Tekgyi station.

To improve overall construction productivity and safety, LTA said it will also use trenchless construction methods, where operational parameters during tunnel construction are controlled to minimize surface settlement.

The LTA added that it will explore other innovative construction methods at CRL to improve overall construction productivity and safety.

Various technologies have already been adopted to increase construction efficiency and safety. These include using virtual reality, augmented reality, and computer simulation tools to enhance functionality and facilitate coordination.

CRL trains stop at the 57-hectare Changi East Depot near the Changi Exhibition Centre. This depot includes an operations control center and maintenance facilities for up to 70 of his CRL trains.

A full CRL is expected to be used by 600,000 passengers daily in the first few years from 2030, rising to over 1 million over the long term.

Contractors and consultants working on CRLs include:

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