The "shuanglong river crossing" of nanchang metro line 4 was officially launched

On September 8, the "communist youth league" shield machine of nanchang metro line 4 from anfeng station to dongxin station successfully started from the wind shaft on the east bank, marking the official departure of two mud-water shield machines "shuanglong crossing the river" by the project department.

The total length of the tunnel from anfeng station to dongxin station of subway line 4 is about 3,054 meters, which is the longest cross-river tunnel in nanchang. Two intermediate wind Wells are set on the east and west Banks of ganjiang river, and two mud and water shields are used for construction. On May 27 and June 23 this year, the two shield tunneling started from dongxin station. After more than 300 meters of construction, the shield tunneling went through the east coast wind shaft, which required receiving, air pushing and secondary starting work. However, the water level in nanchang section of the ganjiang river reached 23.3 meters in July, making it very difficult to receive the shield.

At present, the main structure of dongxin station and fengjing station on the east bank has been capped, and the attached enclosure construction is under way. Xinhongcheng grand market station has entered the construction stage of main foundation pit, with 24 groups of floor design and 4 groups completed by kailei. The design of the side wall of the negative second floor consists of 24 groups, and 4 groups; There are 24 groups of middle board design, and 2 groups of starting and finishing. The design of the negative side wall of the first floor consists of 24 groups and 1 group. From anfeng station to dongxin station, the seepage cutoff wall of the dam on the east bank of ganjiang river with shield tunnel on the right line has passed smoothly and entered the moderately weathered rock stratum on the whole section.