地铁4号线二期盾构将完成“穿江之旅”

Core Points - The completion of the shield tunnel construction at Jiangbei Citizen Center Station marks a significant progress in the Nanjing Metro Line 4 Phase II project, specifically the cross-river shield project [1] - The shield receiving well has a wall thickness of 1.5 meters and an inner diameter of 12.1 meters, with a depth of 45.28 meters, facing high leakage risks due to the surrounding sandy and highly permeable soil [1] - The project team employed a layered demolition method to ensure efficiency while minimizing the impact on surrounding structures [1] Project Details - The Phase II of Line 4 starts from Longjiang Station, traverses through various areas including the Jiangxinzhou, and ends at Zhenzhuquan East Station, covering a total length of approximately 10 kilometers, all underground with 6 stations [1] - The cross-river tunnel, a critical segment, extends 3062.6 meters with the lowest point being 68.58 meters below the Yangtze River surface, setting a record for the deepest cross-river metro tunnel in the Yangtze River Delta [1] - Upon completion, the Phase II of Line 4 will enhance the urban cross-river metro network, alleviate traffic pressure, and provide more convenient public transportation services for citizens [1]