February 12 news: After a month of transport, the "Jinan Yellow River Tunnel No. 1 shield tunneling machine" has recently arrived at the construction site.

The "Jinan Yellow River Tunnel No. 1" is a hybrid slurry balance shield tunneling machine, with a cutterhead diameter of 15.76 m, a length of 166 m, and a total weight of 3,700 t. Its maximum excavation speed is 45 mm/min, its maximum working pressure is 7.5 bar, and its minimum turning radius is 750 m. It is Shandong's first super-large-diameter shield tunneling machine.

The Jinan Yellow River Tunnel is currently the shield tunnel under construction on the Yellow River with the largest diameter and the highest working pressure. It is understood that the "Jinan Yellow River Tunnel No. 1 shield tunneling machine" has begun assembly and is expected to start excavation in the first half of this year.