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"It takes 300 years for the United States to build such a bridge, and it takes at least 3,000 years for you China. Don't waste your efforts!"
In 2016, China spent 10 small goals. In just 3 years, it built a bridge with a height of nearly 600 meters and spanning two grand canyons.
Previously, American experts mocked us for not being able to complete it, but now they are slapped in the face. China's title of " infrastructure madman" is not a false reputation.
What's going on? What kind of bridge is this?
Beipanjiang Bridge
first revealed the answer. This bridge is the world-famous world's tallest bridge - Beipanjiang Bridge.
was previously at the junction of , Xuanwei, Yunnan, and Liupanshui, Guizhou. It was very difficult for local people to travel. If you want to go opposite, you have to climb from the foot of the mountain to the top of the mountain and then go down from the top of the mountain. It takes 6 hours to get there.
is already the 21st century, and there are still such inconvenient transportation, how can this be done? So in 2013, our country was preparing to build a canyon bridge in these two places.
The purpose of the infrastructure maniac is to "break the road through mountains and build bridges across water". For us, isn't it still built in minutes?
is the junction of Yunnan and Guizhou provinces, and the environment is very harsh.
not only has a very high canyon, but also has typical karst landforms nearby, with many caves. If you are not careful about drilling holes on the mountain, you may be able to penetrate a cave that is 100 meters deep. The difficulty and danger of construction can be imagined.
Many foreign bridge experts came to the scene to investigate and found that it was impossible to build a bridge here. Even American bridge architects mocked us: "It takes 300 years for the United States to build such a bridge, and it takes at least 3,000 years for China. Don't waste your efforts!"
But foreigners are not optimistic, so do they want the infrastructure maniac to retreat? Impossible, absolutely impossible!
You should know that China has always been famous for breaking records. For example, among the top ten skyscrapers in the world, China accounts for half of the top 10, and 8 of the top 10 bridges in the world belong to China.
So, Beipanjiang Bridge, we must chew this hard bone, and we must chew it big! Where is the right placement for
? To solve this problem, the engineers spent a whole year inspecting the surrounding terrain. In order to avoid caves and cracks, they finally decided to build a bridge at an altitude of nearly 600 meters. What is the concept of
600 meters high?
is almost the height of 200 floors. If you put the Oriental Pearl of Shanghai in it, it will be more than 100 meters higher!
Even if there is a cave, it's okay, it can be solved! When you encounter a large cave, you can drive piles and pass through it. When you encounter a small cave, you can fill it with smart concrete to make the cave structure more stable. Look at this is Chinese wisdom! The site selection and foundation problems of
have been solved, and the next step is how to build bridge piers.
It is not easy to cross two Grand Canyons, and the steep cliffs and rapid rivers have put forward higher requirements for the country's infrastructure strength.
has never been done abroad, which means we have no experience to refer to.
, but this is not a problem for our engineers. After constantly trying, they found that using auxiliary pier technology can make the bridge more solid, so they applied it.
piers have, but how to connect the bridge deck and steel cable across the canyon? After continuous discussion by engineers, they decided to adopt a method called double row double cable surface cable-stayed cable. The upper end of the cable-stayed cable is fixed on the tower column and the lower end is anchored on the steel truss beam. There are a total of 224 cable-stayed cables on the entire bridge.
In other words, the safety and stability of the entire bridge are highly dependent on cable-stayed cables.
And what's even more amazing is that although the cross-sectional diameter of this cable is only 15 mm, which is about the same thickness as a human finger, it uses high-strength steel with a strength of more than 1,800 megapas.
and for the first time, the edge span top pushing process was adopted on the cable-stayed bridge. The shore and piers were used as the fulcrum, and the assembled edge span was pushed out horizontally from the shore little by little, and finally the cable tower was installed.
After the 12-meter-long and 160-ton steel truss section is assembled on the ground, it is lifted to a height of 200 meters through a crane for air docking. When two 160-ton steel truss docking air, the bolts with a diameter of only 27 mm, and the error between up, down, left and right cannot exceed 5 mm.
was finally built in 2013 with the unremitting efforts of Chinese engineers. It took three years and a total cost of 1 billion yuan. The Beipanjiang Bridge was finally built. The total length of the
bridge is more than 1,300 meters. The vertical distance from the bridge deck to the river surface is 565.4 meters, which is equivalent to the height of more than 200 stories. It has 4 lanes in both directions and a design benchmark period of 100 years. It is currently the tallest bridge in the world.
At the same time, the heights of the main piers on the east and west banks of the bridge are 269 meters and 247 meters respectively. Its main span is 720 meters long, ranking second in the world among the spans of the main spans of the same type of bridge.
The entire bridge uses tens of thousands of steel components, with a total weight of nearly 30,000 tons. If the steel wires of the Beipanjiang Bridge are connected together, the length is even longer than the distance from Beijing to New York.
Comparison of Sino-US Bridge
. When the news that the Beipanjiang Bridge was built in just three years reached the United States, American experts said that it was incredible, but it was fine if we didn't praise us, but they even said that we copied their homework.
What's going on?
It turns out that there is an Golden Gate Bridge , San Francisco, USA. It was built in 1937. It is also a suspension bridge structure similar to the Beipanjiang Bridge, so we said that we copied the construction technology of the Golden Gate Bridge in the United States.
Isn't this very funny? Even if you use suspension bridge , is it considered plagiarism for the car? After all, each car has four wheels and one engine, right? Even if
uses a suspension bridge structure, there is still a big difference here.
firstly, the height is different. The Kinmen Bridge is an cross-sea bridge . The total height of the bridge tower is 342 meters, while the Beipanjiang Bridge is a land bridge across the canyon with a height of nearly 600 meters. The higher the height of
, the greater the technical difficulty requirements. At the same time, the environment encountered during construction is also different from the natural climate.
For example, the Kinmen Bridge should consider the corrosion impact of seawater salt on the bridge's metal structure, while the Beipanjiang Bridge does not need to be considered, but it should consider the local karst landform and the impact of multiple caves on the bridge.
is followed by the difference in the main structure and construction method.
For example, when the Golden Gate Bridge was built, it would be enough to use a large crane for modular installation. Due to the special geographical environment, Beipanjiang Bridge cannot use the large-scale lifting equipment , so it can only adopt original methods, which is much more complicated than the Kinmen Bridge!
This is like two exams for different subjects, with different questions. If the correct answers to one exam are forcibly moved to another paper, wouldn’t you have to get zero points?
The construction of the Beipanjiang Bridge in reality is perfect and impeccable. Can this be considered plagiarism?
ending
Beipanjiang Bridge is built with the intelligence of the Chinese people while protecting the original terrain to the greatest extent. It has to be said that this is another miracle of China's infrastructure. The completion of
greatly saved people's time to pass. The past 6 hours were reduced to 1 hour at once, which brought convenience to the lives of local residents and also promoted the economic development of between the bridges and the bridges.
Once foreign experts mocked us for not being able to build it, and even said that it would take 3,000 years to build it, but reality kept slapping the face.
As for the plagiarism mentioned by American engineers, it is completely made out of nothing!
The United States always waves the big stick of sanctions. If it cannot sanctions, it means that our technology is copying them. We should be used to it, don’t worry! There will be more and more similar bridges in the future.
We will use our strength to prove the title of infrastructure madman, which is real!
