Structural Forms
- Steel Box Girder Bridges: Excellent wind resistance and high overall rigidity; always used for long-span sea-crossing bridges.
- Steel Truss Bridges: Lightweight structure and strong spanning capacity; used for deep-water areas or scenarios requiring reduced foundation size.
- Cable-Stayed Bridges (Steel Main Girder): Strong spanning capacity and aesthetically pleasing design; one of the mainstream forms of sea-crossing bridges.
- Suspension Bridges (Steel Box Girder / Steel Truss Stiffening Girder): Maximum spanning capacity; suitable for strait-level projects.
Product Advantages
- Large span: The marine environment means that cross-sea steel bridges typically require large or even super-large span structures.
- Harsh environment: They must withstand strong winds, high salt spray corrosion, giant waves, sea ice, earthquakes, and other natural forces.
- High construction difficulty: Foundations are difficult to construct, making construction challenging.
- Durability requirements: Steel structures are susceptible to corrosion, therefore requiring anti-corrosion systems (e.g., heavy-duty anti-corrosion coatings, anti-corrosion steel, and cathodic protection).
- Environmental conditions: Marine corrosion, typhoons, waves, tides; freshwater corrosion, floods, current velocities.
The core difference between cross-sea steel bridges and cross-river bridges
|
Comparison Dimensions |
Cross-sea steel bridges |
Cross-river bridges |
|
Environmental conditions |
Marine corrosion, typhoons, waves, tides |
Freshwater corrosion, floods, current velocity |
|
Span requirements |
Typically larger (due to higher aviation requirements) |
Relatively small |
|
Basic Depth |
The water depth can reach tens of meters, and the foundation is complex. |
Relatively shallow |
|
Construction difficulty |
Offshore operations are greatly affected by weather. |
Land or shallow water construction |
|
Investment scale |
Billions to tens of billions of yuan |
Tens of millions to hundreds of millions of yuan |
|
Maintenance costs |
High requirements for corrosion prevention and maintenance |
Resulting in high costs. Relatively lower costs |
Application Scenarios
- Connecting coastal cities and islands;
- Crossing bays, estuaries, and straits;
- Highway and railway cross-sea passages;
- Marine projects requiring rapid construction or reduced foundation size.
If you need more information about the sea crossing steel bridge or want to get a quote, please feel free to contact me. I will provide you with professional service!
