西渝高铁高升一号隧道贯通

Core Viewpoint - The successful completion of the Gaosheng No. 1 Tunnel marks a significant milestone in the construction of the Xi'an-Chongqing High-Speed Railway, laying a solid foundation for subsequent construction phases [1][2]. Group 1: Tunnel Construction Details - The Gaosheng No. 1 Tunnel, located at the border of Xuanhan County in Dazhou, Sichuan Province, and Kaizhou District in Chongqing, is a critical project connecting the Sichuan and Chongqing regions, with a total length of 8,392 meters and a design speed of 350 km/h [2]. - The tunnel traverses the Daba Mountain range, facing complex geological conditions, with a maximum burial depth of approximately 620 meters and 80% of the surrounding rock classified as grade IV and V [2]. - The construction team implemented advanced safety measures, including video monitoring, personnel positioning, and toxic gas detection systems, to address challenges such as landslides and high-sulfur natural gas pipelines [2]. Group 2: Technological Innovations - The project utilized 3D laser scanning technology and innovative construction techniques, achieving an average monthly excavation rate of 110 meters while ensuring quality and safety [2]. - A "zero excavation" green construction approach was adopted to minimize ground disturbance and protect the surrounding ecological environment [2]. Group 3: Strategic Importance - The completion of the Gaosheng No. 1 Tunnel enhances the rapid railway connectivity between Wanzhou, Chongqing's main urban area, and Xi'an, facilitating favorable conditions for the overall operation of the Xi'an-Chongqing High-Speed Railway [3]. - The Xi'an-Chongqing High-Speed Railway's Ankang-Chongqing section spans 478 kilometers, connecting various cities and integrating with existing and under-construction railways, thereby improving regional transportation networks [3].