On May 8, 2026, the final steel box girder segment was successfully hoisted and welded into place, marking the closure of the Ziyang Tuojiang River Bridge-a key control project of the Chengdu-Dazhou-Wanzhou High-Speed Railway (Chengda-Wan HSR). This milestone has laid a solid foundation for the railway to open on schedule.

The Ziyang Tuojiang River Bridge has a total length of approximately 1,606 meters. The main bridge is a steel-concrete hybrid girder cable-stayed bridge with a twin-tower, double-cable-plane design and double-column pylon structures. It features a main span of 320 meters, with both pylons standing 112.5 meters tall, and the deck is situated 65 meters above the Tuojiang River. Throughout the construction process, the project faced multiple challenges, including complex construction techniques, high-altitude operation risks, and the difficulty of geometric control for long-span cable-stayed bridges.

The closure steel box girder segment, measuring 10 meters in length, 16.2 meters in width, and 5.25 meters in height, with a total weight of 171 tonnes, was hoisted by a Boyoun form traveler.

As a national manufacturing single champion product, Shandong Boyoun Heavy Industry Co., Ltd. has long been committed to the standardized and intelligent R&D and manufacturing of form travelers. To date, the company has obtained over 100 patents related to the design and fabrication of form travelers, with its products now upgraded to the fifth generation, achieving a standardization rate of over 90%.

The Boyoun form traveler applied in the Chengda-Wan HSR project fully demonstrates the following core technical advantages:

Lightweight and High Strength

The product has a low self-weight while maintaining high structural rigidity, reducing construction load pressure on the bridge without compromising safety factors.

High Efficiency and Safety

Featuring pin-connected joints and segmented rail design, the system enables convenient assembly and disassembly, along with a stable and efficient traveling mechanism, effectively saving critical construction time for clients.

Precise Control

Addressing the difficulty of geometric control for long-span cable-stayed bridges, the Boyoun form traveler offers extremely high adjustment accuracy, providing equipment-level support for achieving millimeter-level error control during closure.

The Chengda-Wan HSR is a core component of the "Eight Vertical and Eight Horizontal" high-speed railway network's Yangtze River Passage. Upon completion, the railway will further establish a fast comprehensive transport corridor linking the Sichuan-Chongqing region with the Yangtze River Delta and the Beijing-Tianjin-Hebei region, improve the railway network structure in the Chengdu-Chongqing area, support the development of an integrated transportation system within the Chengdu-Chongqing economic circle, and provide a solid transportation guarantee for coordinated, high-quality development of the Sichuan-Chongqing region.