On August 4, the central tower of Pier 33 of the Nanchang Yangtze Island Ganjiang River Rail-Cum-Road Bridge (the Longxing Bridge for the rail-cum-road section), a critical project of the Nanchang-Jiujiang High-Speed Railway, was topped out. With this milestone, both main towers of the bridge have been completed. China Railway Major Bridge Engineering Group constructs this bridge.
The Nanchang-Jiujiang High-Speed Railway spans 138 kilometers, with bridges and tunnels making up 82% of the line. The Nanchang Yangtze Island Ganjiang River Rail-Cum-Road Bridge stretches 19 kilometers from north to south, crossing the west, central, and south branches of the Ganjiang River. It is a large-span rail-cum-road bridge that integrates high-speed rail, an urban expressway, and an urban main road.
The main tower topped out this time features an H-shaped curved structure, standing 144.6 meters tall and requiring 14 months to construct. The bridge's harp-shaped cable-stayed design includes cables made up of 547 steel wires, each 7 mm in diameter and with a strength of 1860 MPa. Each cable has a diameter of 21.1 cm, making it among the largest diameter cables in China.
Upon completion, the west main bridge of the Nanchang Yangtze Island Ganjiang River Rail-Cum-Road Bridge will set six world records:
1. The world's first rail-cum-road bridge with the highest number of lanes (12 lanes) and the greatest traffic capacity.
2. The world's first cable-stayed bridge with a 320-meter main span designed for a speed of 350 km/h.
3. The world's first cable-stayed bridge with a harp-shaped cable arrangement designed for a speed of 350 km/h.
4. The world's first cable-stayed bridge with large cantilever steel trusses.
5. The world's rail-cum-road bridge with the largest diameter stay cables.
6. The world's first cable-stayed bridge using elastic restraint bearings.
