西渝高铁创新实现不中断行车条件下原位换墩施工

Core Viewpoint - The construction team of China Railway 24th Bureau Group has successfully implemented an innovative construction method for the West-Yu High-Speed Railway, allowing for the replacement of bridge piers without interrupting the operation of the existing Xiang-Yu Railway, marking a significant advancement in construction capabilities under complex operational environments [1]. Group 1: Construction Innovation - The construction team faced the challenge of overlapping bridge pier locations between the new West-Yu High-Speed Railway and the existing Xiang-Yu Railway, necessitating a solution that would not disrupt railway operations [1]. - The innovative construction method employed was "non-disruptive operation, in-situ cast beam replacement," which involved lifting the existing bridge as a whole and using temporary supports to maintain its height and stability during the construction process [1]. - The construction achieved precise millimeter-level repositioning of the bridge after the new beam and pier were completed, effectively managing risks associated with limited working space, train vibrations, and load transfer [1]. Group 2: Project Overview - The West-Yu High-Speed Railway spans 739 kilometers with a designed speed of 350 kilometers per hour, consisting of two segments: from Xi'an to Ankang and from Ankang to Chongqing [1]. - Upon completion, the railway will connect with several operational lines, including the Chengdu-Chongqing High-Speed Railway and the Zhengzhou-Chongqing High-Speed Railway, enhancing the connectivity of the transportation network in the central and western regions of China [1].