SGSingapore's government is exploring the feasibility of constructing undersea tunnels connecting mainland Singapore to Pulau Tekong, the country's largest outlying island. Unlike the existing undersea section of the Marina Coastal Expressway (MCE), which used a 'cut and cover' method due to favorable seabed conditions, engineers suggest different approaches may be needed for the new project. The MCE's undersea segment was built at a shallower depth with less complex soil conditions, allowing for a dry construction environment. However, the area between Changi and Pulau Tekong presents more complex geology, requiring alternative techniques such as tunnel boring machines or immersed tunnels. These methods involve either boring through the seabed from land-based shafts or assembling prefabricated tunnel sections on land and submerging them into a dredged trench.
Bias read (Center): The article provides a technical overview of engineering considerations for potential infrastructure projects without taking a stance on the political implications, benefits, or drawbacks of the proposed tunnels. It focuses on expert opinions and construction methodologies rather than advocating for
