On August 29, 2021, as the huge cutterhead of the "Mir" shield machine is slowly turning, the south extension project of Wuhan Heping Avenue passes through the super-large tunnel of the Yellow Crane Tower in the "First Building of the World" and successfully opened in Wuchang District, Wuhan City. dig. The shield section is currently the largest single-tube double-layer tunnel on urban roads in China.

Fu Minggui, Secretary of the Party Committee and Chairman of Wuhan Urban Construction Group, introduced that the south extension project of Wuhan Heping Avenue has a total length of 3,042 meters. Because the ground does not have the conditions to build a trunk road, and at the same time, in order to avoid the impact on the ancient city of Wuchang, the construction of "ground + tunnel" is adopted. , The length of the shield tunnel is 1390 meters. "The launch of the'Mir' is a milestone, marking that the project has entered a stage of comprehensive tackling.

The tunnel passes through sensitive areas such as the ancient city of Wuchang, Beijing-Guangzhou Railway, and Sheshan Scenic Area. It adopts a single-tube, double-layer, two-way six-lane highway design. The outer diameter of the tunnel segment is 15.4 meters, the design speed is 50 kilometers per hour, and an excavation diameter is adopted. 16.03m mud-water balance shield machine construction. This is currently the country's first two-way six-lane single-hole double-decker road tunnel and the largest single-tube double-decker shield tunnel in China. Editor/Xia Changwang