Laying begins for Chinese immersed tube tunnel

Workers have this week begun laying the tunnel's deepest section, set at over 40 metres below sea level.

The tunnel is being built as part of a 24km cross-sea highway project that is being built to improve transport links in the Guangdong-Hong Kong-Macao Greater Bay Area. The 6.8km undersea tunnel consists of 32 immersed tubes and a closure joint.

Upon completion in 2024, the Shenzhen-Zhongshan cross-sea highway will shorten the travel time between Shenzhen and Zhongshan from two hours to just 30 minutes.

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