渝昆高铁洛泽河特大桥合龙

Core Viewpoint - The completion of the Luoze River Grand Bridge marks a significant milestone for the Yukun High-Speed Railway, ensuring its timely construction and operation [1][2]. Group 1: Project Details - The Luoze River Grand Bridge, constructed by China Railway Bridge Bureau Group, spans 524.9 meters and features a main span of 180 meters with a maximum pier height of 150 meters [1]. - The bridge is designed as a double-track single-line prestressed concrete rigid continuous beam bridge, typical for mountainous railway environments [1][2]. - The bridge will be the world's largest prestressed concrete beam bridge in terms of span and pier height for high-speed rail operating at 350 km/h [2]. Group 2: Construction Innovations - To address the high safety risks associated with constructing large-span bridges in complex mountainous canyon environments, the construction team optimized the main beam construction process to a large segment cantilever method [2]. - The maximum segment length was adjusted to 6 meters, reducing the number of cantilever segments to 17, which allowed for a two-month acceleration in the project timeline [2]. Group 3: Railway Impact - The Yukun High-Speed Railway will have a total length of approximately 700 kilometers, with the Yunnan section measuring 388.6 kilometers, making it the first high-speed railway in Yunnan operating at 350 km/h [2]. - Once completed, the travel time between Chongqing and Kunming will be reduced to approximately two and a half hours [2].