Prefabricated steel structure overpass

Introduction

Due to its inherent performance characteristics, steel structures have the advantages of good seismic resistance, wind resistance, and ductility, which can achieve higher building heights.During the smelting and rolling process, the quality of steel can be strictly controlled, and its performance is well guaranteed. The steel structure parts are processed and manufactured in our advanced production workshop, with good quality assurance.

Prefabricated steel structures have fast construction speed, minimal environmental impact, and can be cross constructed, which is beneficial for controlling the construction period.

Modular steel structures are used for design, procurement, and construction, which is beneficial for cost control. Meanwhile, steel structures are lightweight and have low construction costs for ground infrastructure. Its comprehensive cost can be reduced by about 5% per square meter compared to ordinary reinforced concrete.Prefabricated steel structure building materials use fewer materials and are lighter in weight than concrete structures, which can reduce the cost of foundation treatment and decrease the discharge of sewage and garbage from traditional construction sites.

Steel structure can meet the requirements of flexible separation of large spaces in buildings. By reducing the cross-sectional area of columns and using lightweight wall panels, the area utilization rate can be improved, and the effective indoor area can be increased by about 6% -15%.

The construction process of prefabricated buildings is simple, reducing long hours of working in the air and minimizing potential hazards.

Prefabricated steel structures can adopt integrated decoration and interior design technology, which can achieve the integration of architectural design and interior design in the original design stage, reducing some of the decoration and adjustment of the building body after completion.

Steel construction process

The steel structure bridge products processed through multiple processes in the factory have achieved a lightweight advantage of 30% -50%, with a modular prefabrication rate of 85%, shortening the construction period to 1/4 of traditional processes. The double width steel box girder design supports a 300 meter ultra long span structure without piers, and the 100% recyclable material characteristics significantly reduce carbon emissions by 60% compared to concrete structures.

Steel structure transition has comprehensive advantages such as high strength and lightweight, fast construction, short construction time, flexible high tension design, environmental protection and recyclability, durability and easy maintenance, and excellent seismic performance. They can significantly improve technological efficiency, reduce overall lifecycle costs, and meet the needs of modern transportation functions and urban landscapes. It is an ideal choice for three-dimensional urban transportation.

• Material: S355 

• Bridge size: The total length is 81.2 meters, the width is 34.7 meters, and the longitudi nal plane is on a straight line. The transverse slope of the bridge is 2.5%. Due to the us e of prefabricated I-beam steel beams. The bridge is designed with a vertical curve (see T509_SVB-ST_31), with a maximum arch height of 85mm. 

• Welding Material

Coating System

 All coatings in this project shall comply with the Technical Conditions for Anti corrosi on Coating of Highway Bridge Steel Structures (JT/T 722-2008), and the service life of the anti-corrosion system shall not be less than 25 years. The painting system is shown in the following table: