中国最长超深超大基坑地下高铁站海门北站核心区基坑底板“封底”

Core Viewpoint - The completion of the last slab pour for the core pit of the Haimen North Station marks a significant milestone in the construction of the Shanghai-Nanjing-Hefei High-Speed Railway, showcasing advancements in engineering and project management in China [1][5]. Group 1: Project Details - Haimen North Station features a two-level six-line layout, with the first underground level serving as a transfer corridor and the second as the high-speed railway platform, while the third level is reserved for intercity rail [3]. - The station's continuous excavation length reaches 1.8 kilometers, equivalent to 8.5 CR400BF-Z type high-speed trains lined up, with a maximum excavation depth of 29.4 meters, comparable to a 10-story building [3]. - The total excavation volume is approximately 1.48 million cubic meters, with construction challenges arising from the soft geological conditions and high groundwater levels [3]. Group 2: Technological Innovations - The project team employs digital intelligent management techniques, including smart visualized drainage, servo compensation for pit support, and automatic monitoring systems to ensure safety and quality throughout the construction process [3]. Group 3: Project Progress and Significance - Over 80% of the overall construction of Haimen North Station has been completed, with wall and column construction expected to commence fully, aiming for completion of the main structure by the end of March 2026 [5]. - As part of the eastern segment of the Huhang Railway, the Shanghai-Nanjing-Hefei High-Speed Railway is a crucial component of China's "Eight Vertical and Eight Horizontal" high-speed rail network, enhancing connectivity between major urban areas and promoting high-quality development in the Yangtze River Delta [5].