Boring completion of Nanjing metro line 10 river tunnel

The Yangtze River tunnel of Nanjing Metro Line 10 passed through the 58-meter-deep bottom of the Yangtze River safely on Jan 10, 2013.

Nanjing Metro Line 10, constructed by the world advanced slurry-balanced shield tunneling machine, is the longest river-crossing subway tunnel in China. Technical difficulty of the construction is therefore unprecedented.