Ballastless track completed along entire Chengdu-Chongqing Middle Line High-Speed Railway, with a main line length of approximately 292 kilometers

en.Wedoany.com Reported - On September 14, with the pouring of the final ballastless track bed slab completed, construction of the ballastless track along the entire Chengdu-Chongqing Middle Line High-Speed Railway was officially completed. With this milestone reached, the project's subgrade, bridge, tunnel, and other civil works have basically concluded, while station buildings, the "four electrical" systems, and track-laying works continue to advance as planned, creating conditions for subsequent static acceptance, integrated commissioning and testing, and the opening of the entire line.

The Chengdu-Chongqing Middle Line High-Speed Railway has a main line length of approximately 292 kilometers and a designed speed of 350 kilometers per hour. It starts from Chongqing North Railway Station, passes through Chongqing's Liangjiang New Area, Shapingba District, Bishan District, Tongliang District, and Dazu District before entering Sichuan Province, then passes through Ziyang and connects to the Chengdu hub. The line is an important component of the Yangtze River corridor of China's "eight vertical and eight horizontal" high-speed railway network, and is also a new high-speed railway backbone corridor within the Chengdu-Chongqing economic circle. The Chongqing Municipal Government previously disclosed that the line has a total of 41 tunnels, all of which were holed through by May 2026.

The project's ballastless track adopts a high-speed railway track structure system, with track bed slab construction carried out after the completion of offline bridge, tunnel, and subgrade works, providing a foundation for subsequent long rail laying. On May 30, 2026, the Chengdu-Chongqing Middle Line High-Speed Railway officially launched track laying along the entire line, with the first set of 500-meter long rails laid at the construction site in Jianyang, Sichuan. The project gradually shifted from the civil construction stage to the concentrated construction stage of track, electromechanical, and systems engineering.

Previously, the main works of the Chengdu-Chongqing Middle Line High-Speed Railway, including bridges and tunnels, had been successively completed, while station building construction advanced in parallel. Among them, the main structure of the Tongliang Station building was completed in March, and the main construction tasks for subgrade earthworks, tunnels, and box girder erection in the Dazu section were also completed in the first half of the year.

With the completion of the ballastless track along the entire line, the project's construction focus will further shift to long rail laying, overhead contact systems, communications, signaling, power, and station building equipment installation. After the above works are completed, static acceptance, dynamic testing, integrated commissioning and testing, and trial operation will be carried out in sequence to prepare for the subsequent official opening and operation.