How many kilometers is the sea-crossing bridge: Exploring the magnificence and challenges of the world’s longest sea-crossing bridge
In recent years, with the rapid development of global infrastructure construction, cross-sea bridges, as an important link connecting land and ocean, have become a symbol of engineering technology and human wisdom. From China's Hong Kong-Zhuhai-Macao Bridge to Norway's North Atlantic Highway Bridge, these magnificent buildings have not only changed the traffic pattern, but also refreshed mankind's understanding of the limits of engineering. This article will focus on the length, construction difficulty and social impact of the world's famous cross-sea bridges, and use structured data to show the astonishing numbers behind them.
1. Ranking of the ten longest cross-sea bridges in the world
The following is a list of the world's longest cross-sea bridges built or still in operation in the past 10 years (sorted by main bridge length):
| Ranking | Bridge name | Country | Length (km) | Construction time |
|---|---|---|---|---|
| 1 | Hong Kong-Zhuhai-Macao Bridge | China | 55 | 2018 |
| 2 | Hangzhou Bay Cross-sea Bridge | China | 36 | 2007 |
| 3 | Jiaozhou Bay Bridge | China | 26.7 | 2011 |
| 4 | Donghai Bridge | China | 32.5 | 2005 |
| 5 | Denmark-Sweden Oresund Bridge | Denmark/Sweden | 16 | 2000 |
| 6 | Türkiye 1915 Canakkale Bridge | Türkiye | 4.6 | 2022 |
| 7 | Chesapeake Bay Bridge | USA | 37 | 1964 |
| 8 | Seto Bridge, Japan | Japan | 13.1 | 1988 |
| 9 | Hardanger Bridge, Norway | Norway | 1.3 | 2013 |
| 10 | Forth Road Bridge, UK | U.K. | 2.5 | 1964 |
2. Why is the length of a cross-sea bridge so important?
The length of a cross-sea bridge directly reflects the difficulty and cost of the project. byHong Kong-Zhuhai-Macao BridgeFor example, its total length of 55 kilometers includes 6.7 kilometers of undersea tunnels. It is the only super project in the world that combines bridges and tunnels. Here are its core challenges:
| Challenge type | Specific performance | solution |
|---|---|---|
| geological conditions | Soft soil layer and seismic zone | Adopt composite foundation technology |
| marine environment | Typhoon and salt corrosion | Special steel and anti-corrosion coating |
| ecological protection | Chinese white dolphin habitat | Artificial island and low-noise construction |
3. Development trends of future cross-sea bridges
With the advancement of technology, future cross-sea bridges will exhibit the following characteristics:
1.longer span: As plannedBohai Strait cross-sea channel(estimated to be 125 kilometers), possibly using suspended tunnel technology.
2.Intelligent: Embedded sensors monitor structural health in real time, such as a “digital twin” bridge in Norway.
3.green energy: Solar panels are laid on the bridge deck to provide power to the surrounding areas.
Conclusion
From the 55-kilometer Hong Kong-Zhuhai-Macao Bridge to the future suspended tunnel, the mileage record of cross-sea bridges is constantly being refreshed. These projects are not only transportation hubs, but also milestones in human conquest of nature. Next time you drive across a sea-crossing bridge, think about it: behind every kilometer is the wisdom and sweat of engineers and builders.
check the details
check the details
en
