西渝高铁合川东隧道贯通

Core Viewpoint - The Xi'an to Chongqing High-Speed Railway (referred to as "Xi-Yu High-Speed Railway") has achieved a significant milestone with the successful completion of the Chaochuan East Tunnel, marking a phase of progress in the overall tunnel construction [1][2] Group 1: Project Details - The Chaochuan East Tunnel, located in the Hechuan District of Chongqing, has a total length of 7,388 meters and is a single-tube double-track tunnel [1] - The construction area of the tunnel faces challenging geological conditions, with a high proportion of poor rock stability, where grades IV and V rock account for 96.7% [1] - The construction team has implemented innovative techniques, including the use of an "excavation and drilling spray" integrated machine, achieving a monthly advancement rate of over 87 meters and improving work efficiency by 20% [1] Group 2: Project Progress - The Xi-Yu High-Speed Railway's Ankang to Chongqing section has a total length of 478 kilometers, passing through multiple cities and connecting to the Chongqing West Station [1] - Currently, 47 tunnels have been completed, and 65 bridges have been connected, with the project entering a critical phase of beam erection, station construction, and electrical engineering [1][2] Group 3: Regional Impact - Upon completion, the Xi-Yu High-Speed Railway will connect with several existing and under-construction high-speed rail lines, enhancing the transportation network in the central and western regions of China and significantly facilitating travel for local residents [2]