The first tunnel in the old city section of nanchang metro line 4 has achieved a two-way connection

At 16:00 on January 8, nanchang metro line 4, the first tunnel in the old city section of nanchang metro line 4 was completed in two directions.

The length of the right line is 596.528mm, the thickness of the tunnel overburden is 9.2-10.03m, the maximum radius of the interval plane line is 800m, and the maximum slope is 8‰. The line runs through the high-risk water-rich sand layer of the jiuzhou viaduct, and the project is located in.

Since November 11 shield originating in cooperated-builing under the joint efforts of all sides, by the project team, fine management, precision planning for construction projects, so to strengthen the engineering quality control, to carry out the safety management measures, to speed up the progress of the propulsion, finally conquer rich, complicated geological conditions of groundwater, successfully completed the old section of line 4, the first two-way penetration of shield tunnel.