正在建设的南京市纬三路长江隧道路线总长7.4km,采用双管双层盾构隧道形式,隧道施工采用了直径达14.93m的超大泥水平衡盾构机,隧道盾构掘进总里程达7.6km,具有断面大、埋深大、水压高、地质条件复杂、基岩强度、施工难度大等特点,是目前我国已建、在建的盾构隧道中地质条件最复杂、施工难度最大、综合技术含量最高的水下隧道工程。 The Nanjing-Sanjiang Road under construction has a total length of 7.4km and a double-tube double-deck shield tunnel with an overlarge mud-water balance shield machine with a diameter of 14.93m. The total tunnel excavation mileage is up to 7.6km It has the characteristics of large cross-section, large buried depth, high water pressure, complex geological conditions, bedrock strength and large construction difficulty. It is the most complex geological condition and the most difficult construction in China’s shield tunnel under construction. The highest technical content of underwater tunnel engineering.