“Zhenxing” has bored through 915 rings


Major progress on the most challenging tunnel project crossing the Yangtze River has been made. Recently, the CCCC-produced super-sized tunnel boring machine “Zhenxing” has bored through 915 rings (1,830m) of the right tunnel line of the Heyan Road Cross-River Channel project in Nanjing, east China’s Jiangsu Province.

It marks the fact the construction of the channel has crossed the deepest fault and fracture zones at the bottom of the Yangtze River, the largest risk source of the project.

The project involves building China’s first super-large-diameter cross-river tunnel through the fault and karst stratum, with high construction difficulties and risks.

The tunnel section is 2,976 m long. With a total length of about 17 km, the project will further improve links between the two sides of the Yangtze River and the regional traffic network, and will accelerate local economic development.