西十高铁汉江特大桥合龙，通车后武汉到西安2.5小时

Core Viewpoint - The completion of the main bridge structure of the Xi'an to Shiyan High-Speed Railway (referred to as "Xi-Shi High-Speed Railway") marks a significant milestone, paving the way for the railway's timely completion and operation. Group 1: Project Overview - The Xi-Shi High-Speed Railway spans 255.76 kilometers, with a designed speed of 350 kilometers per hour, starting from Xi'an in Shaanxi Province and ending in Shiyan, Hubei Province [3]. - The railway's construction includes 86.36 kilometers within Hubei Province, with a bridge and tunnel ratio of 98.85%, indicating complex geological conditions [3]. Group 2: Bridge Details - The Hanjiang Grand Bridge, located in Shiyan City, is the world's largest span beam and truss combination structure for high-speed rail, with a total length of 917.45 meters and a main span of 420 meters [7]. - This bridge employs a new beam-truss combination structure, marking its first use in high-speed rail in China, effectively controlling temperature-induced deformation and ensuring uniform stiffness distribution [7]. Group 3: Construction Achievements - The construction of the steel truss beam, which is 840 meters long, faced significant challenges, including complex line control and limited lifting space [7]. - The project team overcame multiple technical challenges during the construction phase, which lasted 1259 days since the first pile was poured on March 8, 2022 [7]. Group 4: Future Implications - The Xi-Shi High-Speed Railway is expected to open in July 2026, providing a convenient high-speed rail connection between Xi'an and Wuhan, reducing travel time to under one hour from Xi'an to Shiyan and approximately 2.5 hours from Xi'an to Wuhan [11].