In June 2024, the Jianzishan Tunnel—a critical control project of the Chongqing–Wanzhou High-Speed Railway—was successfully completed, marking a major milestone in the line’s construction. Located at the border between Fuling District and Fengdu County in Chongqing Municipality, the tunnel stretches approximately 8.3 kilometers and is among the longest and geologically most complex tunnels on the entire route. During construction, the engineering team overcame numerous technical challenges, including karst formations, high in-situ stress, and risks of water inrush and mud bursts. Advanced techniques such as real-time geological forecasting, intelligent monitoring systems, and mechanized construction methods were employed to ensure safety and quality. The Chongqing–Wanzhou High-Speed Railway, designed for speeds up to 350 km/h, will drastically reduce travel time between downtown Chongqing and Wanzhou from over two hours to about 50 minutes upon completion. This improvement will significantly enhance transportation efficiency within the Chengdu–Chongqing economic circle and boost regional socio-economic development. The breakthrough of the Jianzishan Tunnel not only paves the way for the railway’s timely opening but also demonstrates China’s advanced capabilities in constructing high-speed rail through complex mountainous terrain.
2024年6月，渝万高铁控制性工程——尖子山隧道顺利贯通，标志着该线路建设取得关键性进展。尖子山隧道位于重庆市涪陵区与丰都县交界处，全长约8.3公里，是渝万高铁全线最长、地质条件最复杂的隧道之一。施工过程中，项目团队克服了岩溶发育、高地应力、涌水突泥等多重技术难题，采用超前地质预报、智能监测和机械化配套作业等先进技术，确保了施工安全与质量。渝万高铁连接重庆主城与万州区，设计时速350公里，建成后将大幅缩短两地通行时间，由目前的2小时以上压缩至约50分钟，显著提升成渝地区双城经济圈的交通效率，促进沿线经济社会发展。尖子山隧道的贯通不仅为全线按期通车奠定坚实基础，也彰显了我国在复杂山区高速铁路建设领域的技术实力。
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