en.Wedoany.com Reported - Recently, with the final box girder precisely and smoothly placed into position, the Class II blockade construction for the box girder erection of the Shuangbu Extra-Large Bridge crossing the Guiyang-Guangzhou Railway on the Zhuhai-Zhaoqing High-Speed Railway was successfully completed. This railway bridge, located in Guangdong Province, China, is a critical and challenging control project for the entire Zhuhai-Zhaoqing High-Speed Railway line. It required crossing both the up and down tracks of the Guiyang-Guangzhou Railway and completing the erection of five box girders between piers No. 5 and No. 10.
The Guiyang-Guangzhou Railway is a double-track, ballasted, electrified passenger dedicated line. The railway bridge intersects the line at a 17-degree angle, and the construction area is located on a small-radius curve section of 600 meters. The heaviest single box girder weighs 714 tons, with various specifications, demanding high precision in beam alignment control. This operation on an active railway line required the simultaneous management of full-process controls, including coordination for overhead contact system power outages, lateral displacement of the bridge erecting machine on the small-radius curve, construction site clearance, and construction registration and sign-off.
From the initial preparation stage, the project department established a special task force to compile construction organization plans and emergency response plans, and collaborated with multiple parties to conduct plan reviews and technical briefings. The project team strictly implemented the "one person, one machine" and "blockade construction, centralized operation" mechanisms, and ensured that "four officers and one leader" personnel were trained and certified before taking up their posts. The technical team conducted multiple rounds of simulations focusing on key processes of the railway bridge construction, comprehensively inspected equipment, and strictly enforced specialized training, assessment, and certification for all operational personnel.
During the construction process, technical personnel controlled the box girder alignment precision to millimeter-level standards, while operational personnel completed core procedures such as bridge erecting machine launching and box girder hoisting. Dedicated safety officers and spotters coordinated in real-time with the station dispatch, strictly adhering to the construction time window, successfully completing all tasks for the overpass box girder erection.
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