Recently, China’s longest high-speed rail tunnel designed for 350 km/h operations—the Jinyun Mountain Tunnel on the Chongqing–Kunming High-Speed Railway—has been successfully completed. Stretching approximately 9.2 kilometers, this tunnel is a critical control project of the railway line, located in Beibei District, Chongqing, and traverses the geologically complex Jinyun Mountain range. To ensure safe and smooth train operation at 350 km/h, construction teams employed advanced technologies such as full-face hard rock tunnel boring machines (TBMs) and intelligent monitoring systems to effectively address challenging geological conditions including high in-situ stress, rock bursts, and water inflows. The breakthrough of the Jinyun Mountain Tunnel marks a significant milestone in the Chongqing–Kunming High-Speed Railway project, laying a solid foundation for the line’s timely completion. Once operational, the railway will drastically reduce travel time between Chongqing and Kunming from over five hours to about two, significantly boosting regional integration and coordinated development among urban clusters in Southwest China.
近日，中国时速350公里高铁最长隧道——渝昆高铁缙云山隧道顺利贯通。该隧道全长约9.2公里，是渝昆高速铁路的关键控制性工程，位于重庆市北碚区，穿越地质条件复杂的缙云山脉。为确保高铁以350公里/小时的速度安全平稳运行，施工团队采用了先进的TBM（全断面硬岩隧道掘进机）技术和智能监测系统，有效应对了高地应力、岩爆、涌水等复杂地质挑战。缙云山隧道的贯通标志着渝昆高铁建设取得重大进展，为全线按期通车奠定坚实基础。渝昆高铁建成后，将大幅缩短重庆与昆明之间的旅行时间，从目前的5小时以上压缩至2小时左右，有力促进西南地区城市群协同发展和区域经济一体化。
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