渝昆高铁桥梁建设全部完成 标志着工程进入全面冲刺阶段

Core Viewpoint - The completion of the bridge construction for the Yukun High-Speed Railway marks a significant milestone, allowing the project to enter the final phase of construction, which includes track laying and subsequent engineering work [3][9]. Group 1: Project Overview - The Yukun High-Speed Railway is a crucial part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, connecting major cities in the southwest region, starting from Chongqing West Station and ending at Kunming South Station [5]. - The railway is designed for a maximum speed of 350 kilometers per hour, significantly reducing travel time between Chongqing and Kunming to approximately two and a half hours upon full operation [9]. Group 2: Construction Progress - With the completion of the bridge construction, the tunnel engineering is 99% finished, and the project is now fully entering the final construction phase, focusing on ballastless track and post-station engineering [9]. - The construction team utilized innovative technology, including the BeiDou navigation system, to achieve precise path planning and dynamic correction during the construction process, successfully completing the prefabrication and installation of 309 box girders after 49 instances of line closure [8].