Recently, China's first cross-sea high-speed railway, the Fuzhou-Xiamen High-speed Railway, has been laid and completed. Judging from the name alone, he cannot detect his extraordinaryness. This is the first high-speed rail project in my country with a service environment in the sea, and it is also the fastest cross-sea railway in the world.
Fu-Xiamen High-speed Railway Line is 277.4 kilometers long and has a designed speed of 350 kilometers. From the map, you can see that the railway line of just 277 kilometers has already spanned 4 bays. After the completion of this line, Fuzhou and Xiamen will realize the "one-hour living circle" , and can also closely link the coastal cities of Fujian.
cross-sea railway is not China's first. Before this, the Seto Bridge in Japan and the Orion Bridge in Denmark have always been miracles in the history of world railway bridge construction. In 2020, the Pingtan Channel Iron Bridge of Fuping Railway built by my country also broke the gap in my country's cross-sea railway bridge. However, these three top cross-sea bridges in the world do not run more than 200 kilometers per hour. The full connection of the Fuzhou-Xiamen High-speed Railway this time can be said to have changed the entire railway history of mankind. The name of China's infrastructure madman has once again resounded around the world. While other countries are still striving to catch up with my country's total high-speed rail mileage, we have already moved the track to the sea. It can be said that in terms of high-speed rail construction, we have left other countries for a generation away from them.
Sea bridge can be seen from its name alone that the technical difficulty of ordinary bridges is not on the same level. The corrosion ability of water and the invasion of sea breeze are the biggest enemies of human construction. What's more, the base of the cross-sea railway bridge must be hit on the seabed silt that is not very solid. All these problems are major problems that have always hindered the development of cross-sea bridges in mankind.
and don’t forget that the coastal areas of Fujian in our country are typhoons high in summer. Strong winds that are often 10 levels. Both construction and later operation bring severe challenges, according to statistics. Here, the wind force at level 16 or above html can reach three months, and the wind force at level 8 or above has reached more than 40 days. Moreover, there is no blockage on the endless sea surface, which can help reduce the wind speed. The cross-sea bridge can only resist the invasion of strong winds alone.
magic is one foot taller and one foot taller. Although the environment is harsh, the engineers have also thought of corresponding solutions. The new linear steel-concrete composite beam structure is a magic weapon to resist strong winds. Using this structure can not only enhance the stability of the bridge and strengthen the wind protection coefficient, but also reduce vibrations when crossing the bridge of high-speed railways. It is precisely because of this new design that the entire railway can withstand the speed of of at 1350 kilometers per hour.
can withstand the daily 8th level winds. According to the results of the on-site environment analysis of the Southwest Jiaotong University simulation, the Fuzhou-Xiamen Railway train can still operate stably under a storm of level 11. Even if the wind reaches level 8, you can still drive at normal speed. It can be said that in terms of safety, Fuzhou-Xiamen Railway has been as foolproof as possible since its design.
In addition to strong winds, cross-sea high-speed rail also faces strong corrosive marine atmospheric environments such as high humidity, high salt, and strong ultraviolet rays. In the high salt and high humidity climates in coastal areas, it is difficult to meet the standards by relying on traditional steel beam surface coating anti-corrosion methods.
To solve this problem, enables the entire railway to run safely for a hundred years . The engineers innovatively designed the ultra-long steel beam anti-corrosion coating system . The magical chemical reaction enhances corrosion resistance several times that of the prior art by fusing graphene nanomaterials with inorganic zinc-rich primers and ultra-weathering fluorocarbon paint. Even in the face of the ocean's unique high humidity and high corrosion environment, it is conservatively estimated that it can still be used continuously for 30 years.
In addition to resisting strong winds and seawater erosion. The entire railway line is also at a world-class level in terms of seismic resistance. He adopted a comprehensive seismic isolation system and technology to apply the deep water guide bridge to the domestic railway supportless overall bridge for the first time, realizing a long supporting bridge without sea at sea, meeting the technical conditions of laying ball-free track and the seismic resistance requirements of the high-pier cross-sea bridge with high earthquake intensity, so that the bridge can withstand strong magnitude 18.
has a lot of things, and the face cannot be left behind. With the support of a series of high-tech and innovative technologies, the entire railway can already ensure safety and durability. On the premise of achieving reliability and durability, the construction team did not give up on the pursuit of bridge and beauty. In order to coordinate the bridge environment with the ocean and perfectly integrate the entire railway into the marine environment, the bridge was designed as a shell-shaped curve. It seems like huge shells stand on the ocean.
The construction of Fuxia Railway has entered the last moment. If everything goes well, the entire line will be officially completed and opened to traffic in 2023. In terms of cross-sea construction, my country also has valuable experience in the Hong Kong-Zhuhai-Macao Bridge and Fuzhou-Xiaxia Railway. The traffic problems of many bays across my country's coastal areas will be cleared up, which will also play a positive role in the future construction of Qiongzhou Strait Cross-sea Channel .
Conclusion: In addition to the economic benefits brought to the local area after the entire railway is opened to traffic, my country's experience and innovative technology accumulated in the construction of cross-sea high-speed railways will be far ahead of the world and become a country that masters the most advanced high-speed railway technology. I believe that in the near future, we can see the high-speed railway bridges built by China in all countries around the world.
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