On August 4, 2022, the Anhaiwan Bridge, a key control project of the Fuzhou-Xiamen High-speed Railway, completed the construction of the ballastless track. So far, the construction of the ballastless track of the three sea-crossing bridges on the Fuxia-Xiamen High-speed Railway has been completed and has entered the stage of full track laying.

As a long-span high-speed railway cross-sea cable-stayed bridge, affected by the natural environment, the height of the bridge deck will change with the rise and fall of the temperature, which will affect the smoothness of the track. Unfavorable factors such as ocean wind and waves make the bridge's stability face great challenges. Laying ballastless tracks can avoid ballast splashing, and is more smooth and stable. However, the "large span" and "sea-crossing" attributes of the bridge itself make it a very challenging technical problem to "go on the bridge" with the ballastless track. To this end, the main beam of the bridge adopts effective aerodynamic measures to reduce the wind-induced vibration in the complex wind environment.

Fuxia-Xiamen high-speed railway is China's first cross-sea high-speed railway, with a total length of 277.42 kilometers. The whole line spans Meizhou Bay, Quanzhou Bay and An Bay, and has three cross-sea bridges. With the completion of the ballastless track construction of the Anwan Bay Bridge, the three sea-crossing bridges have all entered the track laying stage. It is understood that the Fuzhou-Xiamen high-speed railway will be put into operation in 2023, when Fuzhou and Xiamen will realize a "one-hour living circle".Editor/Ma Xue