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  Underpinning Live MRT Tunnels, Ground Freezing and Mined Tunnelling Works at Marina Bay Station in Singapore

  Thomson-East Coast Line (TEL) is a fully underground Rapid Transit System which is approximately 43km long with 31 stations and the integration of six existing station as interchanges further enhances public transport accessibility. T226 Marina Bay Station being one of the interchanges allows pedestrians to commute between the North-South Line and Thomson East Coast line. The two stacked mined tunnels connecting Shenton Way Station to Marina South Station were constructed directly below Circle Line and North-South Line tunnels. With close proximity to the existing tunnels poses great challenges to the construction works without any disruption to the daily operation of Rapid Transit System. Furthermore, termination of the existing North-South Line piles had to be carried out for the construction of link way and mined tunnels. With limited space available and for the works to be carried out safety, innovative engineering solutions had to be adopted, which sees the birth of the Ground Freezing method in the Rail Construction history of Singapore.

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