On June 11, 2026, the construction of the Changsha-Ganzhou High-Speed Railway achieved a key breakthrough: the underwater works of the Changsha Xiangjiang Railway Grand Bridge have been basically completed, and the project has fully shifted to the ground elevated construction phase. This cable-stayed bridge, with a main span length of 768.1 meters, has successfully passed the most difficult "underwater operation" of the entire Changsha-Ganzhou High-Speed Railway after the completion of its underwater section. You may not know that the construction difficulty of this bridge is described by the industry as "hell-level" — the granite strength at the bridge site is as high as 180 MPa, the rock surface is inclined and undulating, and the horizontal distance between the center of the left line and the center of the existing Shichang Railway second line is only 33.67 meters. Under such conditions, the main pier pile foundation was completed 44 days ahead of schedule, which can be called an engineering miracle. The main bridge of the Changsha Xiangjiang Railway Grand Bridge has a total length of 768.1 meters and adopts a cable-stayed bridge scheme to cross the main navigation channel of the right branch of the Xiangjiang River. It is the most important node project of the Wangcheng section of the Changsha-Ganzhou High-Speed Railway. As of June 11, of the 5,102 designed bridge pile foundations, 1,238 have been completed; of the 561 designed pile caps, 75 have been completed; and of the 561 designed pier bodies, 54 have been completed. The main pier pile foundations have all been completed, and only 6 pile foundations of the side piers and auxiliary piers remain unfinished. The construction contractor is concentrating its efforts on advancing the main pier cofferdam trench milling construction.

In order to overcome this "hard bone," the project team specially customized a short drill pipe rotary drilling rig, innovatively adopted a four-stage reaming process, and implemented the "three-self" management model of "self-owned equipment, self-managed teams, and self-controlled production." During construction, the team adopted a combined process of double barges, rotary drilling rigs, crawler cranes, and hydraulic vibratory hammers, and applied an information-based intelligent monitoring system to achieve intelligent collection of construction data and high-precision real-time monitoring. More notably, the site is also equipped with a train warning system, a laser radar electronic barrier, and a deformation monitoring system for the existing railway line to ensure construction safety in close proximity to the operating railway.

Looking at the entire line, the construction of the Changsha-Ganzhou High-Speed Railway is progressing at multiple points. Just a few days ago, on May 27, the main pier pile foundations of the Ganjiang Railway Grand Bridge in the Jiangxi section were also fully poured. This bridge, with a main span of 300 meters, is only 63 meters away from the already-open Ganjiang Grand Bridge of the Changsha-Ganzhou High-Speed Railway, and in the future the two will form an urban landmark landscape of "two rainbows lying over the waves." The simultaneous breakthroughs of the two river-crossing grand bridges mean that this high-speed railway artery, with a design speed of 350 kilometers per hour and a main line length of 429.4 kilometers, has already moved from drawings to real reinforced concrete on the land of Hunan and Jiangxi.

The bridge-tunnel ratio of the entire Changsha-Ganzhou High-Speed Railway is extremely high, with the Jiangxi section reaching as high as 88.24%, which means that for every 100 kilometers traveled, 88 kilometers are through bridges and tunnels. A total of 273 new bridges and 117 tunnels will be built along the entire line. At present, the longest tunnel on the entire line — the Jinggangshan Tunnel, with a total length of 14.116 kilometers — has maintained a monthly excavation speed of 150 meters since entering main construction in February, and is currently passing through the hinterland of the Luoxiao Mountains, where karst, underground rivers, and rock bursts are frequent. The Huanghua Airport West Tunnel in the Hunan section is about 3,290 meters long and passes beneath the core area of Changsha Huanghua Airport. The advanced pipe-roof construction for the underpass beneath the airport is expected to start at the end of June.