CRCHI Creates World Record - Deploys 52 TBMs at Guangzhou Metro Construction

The construction project of Guangzhou Metro Line 18/22 - the largest metro investment in China - has attracted much attention. CRCHI has tailored 52 φ8.8m EPB/Slurry TBMs for the project, creating a world record of the largest TBM construction group applied in a single project to help construction of the Guangzhou Metro and serve the Guangdong - Hongkong - Macao Greater Bay Area.

Construction site of Guangzhou Metro Line 18

Located in the alluvial plains of the Pearl River Delta, Guangzhou has an unique geological fault structure, known as the ‘’geological museum’. The metro project is spread all over this city and has 33 comprehensive hubs reaching 7 districts.

The region has both soft and hard rock; the silt layer has high water content and low bearing capacity, making it very easy for ground settlement. The TBMs had to cross the area with high safety risk and faced a lot of difficulty during construction.

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