To safeguard the riverine ecological environment, the project innovatively adopted the "single-hook hoisting" construction technology, successfully completing the integral hoisting of long-span steel components. Throughout the process, the hoisting was executed smoothly with precise positioning, overcoming the technical challenge of long-span hoisting under unsupported conditions and demonstrating the superb construction management and control capabilities of the company's project team. The successful closure on this occasion is another vivid practice of the company fulfilling its corporate mission of "Crafting High-Quality Products, Building Premium Projects". Looking ahead, the company will continue to increase investment in technological R&D, drive the upgrading of engineering construction through technological innovation, and contribute Huayi's strength to the construction of more major national infrastructure projects
A steel box girder is a high-performance structural component widely used in large-span infrastructure projects, characterized by a hollow box-shaped cross-section (typically composed of top and bottom flanges, web plates, and diaphragms). As a core load-bearing element, it integrates superior mechanical properties, structural stability, and construction adaptability, making it an indispensable choice for bridges, viaducts, large stadiums, and cross-river/sea transportation projects.
Core Structural Advantages
Exceptional Load-Bearing Capacity: The closed box-shaped structure enables uniform force distribution across the cross-section, effectively resisting bending, torsion, and shear forces. Compared with traditional I-beams or plate girders, steel box girders exhibit higher rigidity and load-carrying efficiency, making them ideal for long-span projects (often applied in bridges with spans exceeding 100 meters, such as cable-stayed bridges, suspension bridges, and continuous rigid-frame bridges).
Superior Stability & Anti-Torsion Performance: The enclosed cross-sectional design eliminates the risk of lateral buckling, ensuring structural stability even under complex loads (e.g., dynamic traffic loads, wind loads, or uneven settlement). This advantage is particularly critical for curved bridges or long-span structures where torsion resistance is a key requirement.
Lightweight & High Efficiency: Steel's high strength-to-weight ratio allows steel box girders to achieve longer spans with a relatively lighter self-weight, reducing the burden on piers and foundations. This not only optimizes the overall project design but also lowers construction costs and shortens the construction period.
Excellent Construction Adaptability: Steel box girders can be prefabricated in factories with high precision (leveraging advanced welding, cutting, and assembly technologies) and then transported to the construction site for hoisting and splicing. This modular construction method minimizes on-site construction interference, especially suitable for complex environments such as urban core areas, cross-river/sea sections, or ecologically sensitive zones (as seen in the "single-hook hoisting" technology for riverine projects).
Durability & Environmental Friendliness: High-quality steel materials (e.g., weathering steel, corrosion-resistant alloy steel) combined with anti-corrosion treatments (such as galvanizing, painting, or composite coatings) ensure long-term durability, with a service life of up to 50-100 years under proper maintenance. Additionally, steel is 100% recyclable, aligning with green construction and sustainable development trends.
Typical Application Scenarios
Long-Span Bridges: As the main load-bearing structure for cross-river, cross-sea, or intercity bridges (e.g., sea-crossing bridges, urban viaducts, and highway overpasses), steel box girders effectively address the technical challenges of long-span spanning and complex terrain adaptation.
Large-Scale Buildings: Used in the roof structures of stadiums, convention centers, and airport terminals, where large-span coverage and structural aesthetics are required.
Special Engineering Projects: Applied in viaducts for high-speed railways, urban rail transit, and industrial plants, leveraging their excellent stability and load-bearing capacity to meet strict operational requirements.
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