en.Wedoany.com Reported - Recently, after 24 hours of continuous uninterrupted construction, the final roof slab of the reserved core area foundation pit of Haimen North Station, a key control project of the newly built North Yangtze River High-Speed Railway, was successfully poured, marking the full completion of the main structure of China's longest ultra-deep, ultra-large foundation pit underground high-speed rail station and a phased progress in the project construction.
Haimen North Station is a rare large-scale underground high-speed rail hub in China, characterized by its massive scale, complex structure, high technical difficulty, and prominent safety risks. Its continuous excavation length reaches 1.8 kilometers; the maximum excavation depth is 29.4 meters, close to the height of a 10-story building; the total earth excavation volume is approximately 1.5 million cubic meters, equivalent to 600 international standard swimming pools.
Haimen North Station is located in water-rich silt, silty sand, and muddy silty clay strata, typical of "loose upper, soft lower" unfavorable geology, making construction as difficult as "building a high-speed railway in a tofu block." Constructing an underground station capable of accommodating trains running at 350 kilometers per hour in such strata has no precedent internationally. "The project construction team, relying on digital intelligent control methods, innovatively applied three major systems: intelligent visual dewatering, foundation pit support servo compensation, and automatic foundation pit monitoring, establishing a full-process monitoring system for real-time collection, transmission, analysis, and early warning, achieving preemptive handling of potential risks and ensuring full control of project safety and quality throughout," said Wang Zhengyang, the project's on-site production deputy manager.
Haimen North Station adopts a layout of two platforms and six tracks, with the underground first floor serving as a transfer passage, the underground second floor as the high-speed rail platform level, and the underground third floor reserved for local intercity rail tracks. The north side of the station connects to the planned Nantong New Airport, and in the future, it will be developed into a large-scale comprehensive transportation hub integrating multiple modes of transport such as high-speed rail, aviation, intercity rail, subway, buses, and taxis. The completion of the underground main structure marks the official transition of Haimen North Station construction into the phases of support structure removal, electromechanical installation, and station building construction, achieving a key leap from "structural breakthrough" to "system integration." Once completed, the project will establish a fast new corridor among the Shanghai Metropolitan Area, Nanjing Metropolitan Area, and Hefei Metropolitan Area, holding significant strategic importance for optimizing the railway network layout along the Yangtze River region, serving the coordinated development of the Yangtze River Economic Belt, and promoting the high-quality integrated development of the Yangtze River Delta.
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