A pioneering infrastructure project in Zhuhai, China. The multi-tower cable-stayed bridge accommodates both rail and road traffic on the same deck spanning the Modaomen Waterway at the Xijiang River estuary. The bridge supports a double-track intercity railway and a six-lane expressway, facilitating efficient transportation in a region with challenging construction conditions. The bridge features a three-span design with four towers, utilising a continuous rigid-frame system to enhance structural rigidity and reduce the impact of temperature changes. The bridge deck, 49.6m wide, comprises a central railway flanked by two highway lanes. The design incorporates innovative steel box girders with long cantilevers, optimised for both load bearing and material efficiency. Prefabrication and large-scale assembly technologies were employed to address the difficult offshore construction environment, ensuring precision and efficiency.
This large cable-stayed bridge successfully integrates a double-track intercity railway and a six-lane expressway on the same deck optimising resource use and reducing the construction footprint.
The use of a continuous rigid-frame system significantly improves overall structural rigidity, reduces static live load deflection and decreases fatigue stress in stay cables enhancing durability and performance.
Implementing large-scale, prefabricated construction techniques allowed for the assembly of large segments, reducing the number of segments and facilitating efficient erection, even in challenging offshore conditions.
Digital erection technology was successfully used to enable rapid construction and sets a benchmark for speed and accuracy in large bridge construction.