The reporter learned from China Railway Shanghai Group Co., Ltd. that the south main tower of the Ma'anshan Yangtze River Road-Rail Bridge—the world's largest-span three-tower cable-stayed bridge—was capped on the 15th. The 306-meter-tall tower column stands on the bank of the Wanjiang River, marking a breakthrough progress in the project construction.

　　The Ma'anshan Yangtze River Road-Rail Bridge is a controlling project of the entire Chaohu-Ma'anshan intercity railway line. Its main channel bridge is designed as a three-tower steel truss cable-stayed bridge with a main span of (2×1120) meters and a total length of 3,248 meters. It is the world's first three-tower cable-stayed bridge with two main spans exceeding one kilometer, the world's largest-span three-tower cable-stayed bridge, and also the world's longest continuous steel truss cable-stayed bridge. The upper deck of the bridge carries a two-way six-lane urban expressway, while the lower deck carries the double-track Chaohu-Ma'anshan intercity railway, with an additional two reserved railway tracks.

　　On January 15, an aerial photograph of the Ma'anshan Yangtze River Road-Rail Bridge construction site.

　　The south main tower capped this time was constructed by CCCC Second Harbor Engineering Co., Ltd. The tower adopts a steel-concrete composite structure, in which the middle and lower tower columns are of a concrete double-leg structure with a height of 218.5 meters; the upper tower column is of steel structure with a height of 87.5 meters, consisting of 16 segments, with the largest single segment weighing 390.8 tons. The steel tower adopts a bolted-welded combined connection process. The steel tower segments are pre-assembled and manufactured in the factory, and on-site assembly uses matching trusses to restore the factory pre-assembly state, ensuring a "perfect fit."

　　To ensure the smooth capping of the south main tower, the construction management unit Ning'an Railway Company organized CCCC Second Harbor Engineering Co., Ltd., China Railway Major Bridge Design Institute and other participating units to cooperate in applying modern intelligent construction technology, completing the lifting and assembly of the upper tower steel segments 134 days ahead of schedule.