西渝高铁正线最长隧道掘进突破万米

Group 1 - The construction of the Yujialiang Tunnel, a key project of the Xiyu High-Speed Railway, has surpassed a cumulative excavation length of 10,000 meters, entering the final sprint phase [1] - The Xiyu High-Speed Railway, spanning approximately 739 kilometers with a design speed of 350 km/h, is the first railway to cross the Daba Mountain region in China, consisting of two segments: Xi'an to Ankang and Ankang to Chongqing [1] - The Yujialiang Tunnel, located in the Qinba Mountain area, is the longest tunnel on the Xiyu High-Speed Railway at about 14.5 kilometers, facing significant construction challenges due to complex geology and high safety risks [1] Group 2 - The project team is implementing strict construction guidelines to ensure safety and efficiency, including "short advance, weak blasting, strong support, frequent measurement, and timely lining" [1] - Innovative technologies and management practices, such as the "double tunnel long" responsibility system and 24-hour site supervision, are being utilized to enhance construction quality and efficiency [1][2] - Upon completion, the Xiyu High-Speed Railway will reduce the travel time between Xi'an and Chongqing from approximately 6 hours to about 2.5 hours, improving the railway network structure in the central and western regions of China and promoting economic development along the route [2]