西渝高铁康渝段首座超6公里隧道贯通

Core Viewpoint - The successful completion of the Wanjia Mountain Tunnel marks significant progress in the construction of the Xiyu High-Speed Railway, specifically the Kangyu section, which is crucial for enhancing transportation connectivity in the central and western regions of China [1][5]. Group 1: Tunnel Construction Details - The Wanjia Mountain Tunnel is 6,465 meters long and is a single-tube double-track tunnel, designed by China Railway Erju and constructed by China Railway Sixth Group [3]. - The construction faced complex geological conditions, including soft rock deformation and harmful gases, which posed high safety risks and construction challenges [3]. - Advanced construction techniques were employed, including laser calibration for arch installation, intelligent concrete pouring systems, and step-by-step excavation methods to ensure safety and timely completion [3][5]. Group 2: Impact on Transportation and Development - With the successful completion of the Wanjia Mountain Tunnel, a total of 43 tunnels have been completed in the Kangyu section of the Xiyu High-Speed Railway, with other major infrastructure works progressing smoothly [5]. - The Xiyu High-Speed Railway will connect with other major high-speed rail lines, significantly reducing travel time between Xi'an and Chongqing, thereby improving the railway network structure in the central and western regions [5]. - The railway's completion is expected to facilitate rural revitalization, promote urban-rural integration, and support coordinated regional development, contributing to a new pattern of western development [5].