en.Wedoany.com Reported - The main bridge of China's Qinglongmen Grand Bridge, the world's longest three-tower steel box girder cable-stayed bridge, recently closed successfully. Five large-tonnage tower cranes from XCMG Construction Machinery Co., Ltd. (referred to as "XCMG", 000425.SZ) participated in the entire construction process, laying a solid foundation for the full-line opening of Phase II of the Ningbo-Zhoushan Port Liuheng Bridge project on schedule.

The Qinglongmen Grand Bridge, with a total length of 2,212 meters, adopts an ultra-large span layout of 2×756 meters for its two main spans, ranking first among similar bridge projects worldwide. Two XCMG XGT8300-320S and XGT7300-260S hundred-ton-class tower cranes, along with three 25-ton-class tower cranes, jointly hoisted three diamond-shaped steel-concrete composite cable towers, each reaching a height of 249 meters. The Qinglongmen sea area is a typical strong tidal and surge zone, with winds above Force 6 occurring for over 50% of the year and an average of more than 40 foggy days annually, resulting in an extremely limited offshore construction window. Under harsh sea conditions, the alignment of giant steel box girders at heights of over 100 meters and the hoisting of ultra-high tower components required both bearing ultra-heavy loads and ensuring extreme precision.

The two hundred-ton-class tower cranes jointly undertook the hoisting of the main tower's core components, while the two 25-ton-class tower cranes worked in close coordination to ensure precise alignment of the cable tower segments. To withstand the challenges of high-altitude variable sea conditions, the tower cranes were reinforced with wind-resistant structures, enhancing stability and anti-sway performance. From the Shuangyumen Grand Bridge to the Qinglongmen Grand Bridge, over nearly a thousand days and nights, XCMG tower cranes remained stationed throughout the two world-class cross-sea projects of Phase II of the Liuheng Highway Bridge. The successful closure of this project demonstrates the technical strength of China's large tower crane manufacturing in the field of cross-sea bridge construction.

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