en.Wedoany.com Reported - On March 30, the concrete pouring for the cap beam of Pier S4 on the Shazaili Waterway Bridge, part of the Lion's Bay Link project, was completed. This marks the conclusion of cap beam construction for all four permanent concrete piers of the bridge. The project now transitions from substructure work to the superstructure installation phase, accelerating progress towards the line's full connection. The Shazaili Waterway Bridge is a critical section of the Lion's Bay Link and is being constructed by China Communications Second Highway Engineering Bureau Co., Ltd.
The Shazaili Waterway Bridge adopts a variable-depth, double-deck, variable-cross-section, three-main-truss continuous steel truss girder structure, with a total length of 660 meters, featuring a relatively large span among similar double-deck bridges. The cap beams for Piers S2 and S3 are the largest on the entire project line. The single pour volume of C50 concrete for each reached 2,226 cubic meters, equivalent to the volume of a standard swimming pool. The cap beam for Pier S4 is 47.6 meters long, with a pour volume of 1,823 cubic meters. The project utilized an intelligent temperature control system and a combined support system to ensure construction quality.
Following the completion of cap beam construction, the installation of the steel truss girder, weighing approximately 35,000 tons, is expected to commence in July this year, though it faces technical challenges. The bridge's double-deck, variable-cross-section, three-main-truss structure presents difficulties such as ultra-long cantilever assembly, precision closure of large-section members, and the arrangement of temporary support piers. The side span cantilever length is 75 meters, and the mid-span is 135 meters, requiring control through modeling and simulation. Closure points are susceptible to environmental factors, necessitating millimeter-level precision. The layout of temporary support piers is constrained by the mangrove reserve and navigation channels, with a single pile bearing capacity reaching 1,446 tons.
Overall progress on the Lion's Bay Link project is proceeding smoothly. The east and west cable towers of the Lion's Bay Bridge have been topped out, anchor construction is advancing, and the project has fully entered the superstructure construction phase. As the first double-deck river-crossing channel in the Pearl River Estuary, the Lion's Bay Link, upon completion, will alleviate traffic pressure on the Humen Bridge and the Nansha Bridge, supporting the transportation network of the Guangdong-Hong Kong-Macao Greater Bay Area. The project involves significant technical difficulty, with relatively advanced technical indicators. The experience gained can provide valuable reference for future composite three-dimensional transportation projects.
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