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Mon May 17 2021

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TBM for Chinese metro designed and built in five months

16 Aug 17 A 148m-long double-shield tunnel boring machine (TBM) for a Chinese metro line has been designed and manufactured in just five months.

China Railway Construction Heavy Industry has developed the machine – called Wushi - specifically for Shenzhen Metro Line 6. The company said that the general delivery speed for similar equipment in other companies is more than a year.

The equipment, which has an excavation diameter of 6.47m, will be used for a line that needs to pass Yangtai Mountain and multiple broken strata. The strata of rock surrounding the tunnel are complex and changeable, including a dry compressive strength of more than 100MPa.

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