
On March 4, the builders of the 14th Bureau of China Railway were working in the Huanggang Road through the Yellow Tunnel in Jinan City.
On the same day, the Huanggang Road through the Yellow River Tunnel in Jinan City, Shandong Province entered the Yellow River water section of the construction, and the tunnel shield section has been excavated for a total of 1,658 meters, more than half of the excavation. The total length of the Huanggang Road through the Yellow Tunnel in Jinan City is about 5,755 meters, of which the shield section is about 3,290 meters long, and the diameter of the shield machine excavation is 17.5 meters, which is the world’s largest diameter underwater shield tunnel currently under construction.