China has always been known as an infrastructure madman. It is no exaggeration to say that it has been recognized by the world. There is such a bridge in the United States, which costs 50 billion yuan and has about 240,000 vehicles passing by every day, but it was built by China.

China has always been known as an infrastructure madman. It is no exaggeration to say that it has been recognized by the world. The most important thing is that the most difficult bridges in the world have been built by China, and China's bridge technology is better than Western countries in terms of bridge height, length and technical difficulty. What many people don’t know is that our bridge construction technology has long been exported abroad, just like the United States exports chips to the world.

There is such a bridge in the United States, which costs 50 billion yuan and has about 240,000 vehicles passing by every day, but it was built by China. As soon as this news came out, it immediately triggered public opinion across the United States, because the Bay Bridge is not only a landmark of , San Francisco, , but also a symbol of the United States. For example, it is like China's Great Wall collapsed, and it will cost money to find Americans to repair it. Especially when the construction cost was made public, the American people were so anxious that they went directly to the streets, with $7.2 billion! You heard it right. The construction cost of this bridge is as high as US$7.2 billion, or RMB 50 billion. If you use this money for other purposes, you can build a quarter of the Three Gorges Project. If you buy an entire aircraft carrier, , no wonder the Americans are anxious. So the question is, what kind of bridge is this? Can't the United States build itself? Why only China is used to build it? Today we will talk about these issues together. Friends who like it can hold on for a long time and like and follow. I am a specialist in the strengths of a great country. Let’s continue to read.

San Francisco Oakland Bay Bridge, USA, stands in the San Francisco Bay in the United States and was once the largest bridge span in the United States and even the world. In fact, this Bay Bridge had already started opening traffic as early as 1936. At that time, the gold rush emerged in the United States. In order to connect the San Francisco Bay with the outside world, the US government spent $77 million to build this world-renowned bridge. Since its debut, it has won many world firsts. It not only has the largest bridge cantilever in the world, but also has the longest diameter drilled tunnel in the world. Its length is 4473 meters and its width reaches an astonishing 78.74 meters, making it the widest bridge in the world at that time. It can be said that in the past half century, it has become a symbol of American honor. With its strong load capacity, nearly 170,000 cars have been rolled over from above every day in more than 70 years. It can be said that it is equivalent to the United States, which is equivalent to , Beijing Palace Museum, and , and to China. It has an important position in both sense and reality.

In order to celebrate its birth, on the day of the bridge's completion, the then-US president Hoover also personally traveled thousands of miles to attend the ribbon-cutting ceremony of that day. Even the Pope of Europe came to express his blessings before the bridge opened to traffic. It can be seen from this that the Bay Bridge is not only a symbol of the United States, but also a favorite of the entire West. But such a beloved behemoth has become bruised and bruised in the 70 years of storm. The worst blow was that in October 1989, a major earthquake in San Francisco caused huge losses to San Francisco. These include the east section of the Bay Bridge. The east section was restored for more than a month due to the collapse of the bridge deck, and the west section was also subject to earthquake-resistant reinforcement. Replace the structure that originally supported the bridge deck without hindering the passage of the bridge. But since then, the Bay Bridge has been in trouble as if it was cursed. Today, cracks were found and tomorrow fractured, and there was no one that would stop people from silence. Seeing that the bridge is in accidents every day, the San Francisco authorities are anxious. You must know that nearly 300,000 cars drive past this every day. If a major accident occurs one day, the consequences will be unimaginable. So after several thoughts, the government decided to thoroughly maintain the bridge, and this time it was necessary to fundamentally relieve the future problems. For this reason, they planned to spend $7.2 billion.

This news immediately triggered turmoil across the United States, with $7.2 billion. This is not only the most expensive project in the history of California , but also a super project rare in the entire United States.Next, American companies have tried their best to compete for this project. As we all know, Americans were once the top engineers in the world. They could build a 443-meter Empire State Building in just 410 days, and they could also win the Golden Gate Bridge with their backward tools in the 1930s. But at some point, with the intensification of the financial crisis, the American construction industry has long since withered talents, just like Wang Xiaoer’s New Year, it is worse than the year. Therefore, after some investigation, the San Francisco authorities completely disappointed the local enterprises. Not to mention participating in the construction, they did not even come up with a decent plan. Because of the economic crisis in the past few years, some engineering companies in the United States have long been dismissed. Coupled with the high local labor costs, the budget of 7.2 billion yuan has increased again and again, far exceeding the capacity of the San Francisco authorities.

Watching the start of construction, the San Francisco government had no choice but to push the project internationally, and soon Japan and China entered the final competition one after another. According to insiders, the Americans planned to find Japanese to build them at the beginning, which was also their alternative. Since their own people couldn't do it, they would rather give the money cheaper than give it to China. After all, that's 50 billion yuan. However, the Japanese are not doing well. Although they did a good job in earthquake resistance, they were defeated due to lack of large-scale cross-sea experience and could only watch Chinese companies take this hot commodity into their arms. What's more interesting is that this Chinese company is Shanghai Zhenhua Heavy Industry, which almost made the US president unable to come to Taiwan. In 2013, in order to promote the then-President Obama , the president, held a grand speech at the Port of Miami in the United States. In front of the microphone, he shouted with excitement: "We must support domestic companies, use more American artificial products, and drive some other products from other countries out of the country." Just as he waved his arms indignantly and interacted with the audience below, a gust of wind blew, which happened to blow away the national flag above Obama's head. Coincidentally, the pattern of ZPMC happened to be revealed. This pattern happened to be the symbol of China Zhenhua Heavy Industry, that is, Obama was angry on the stage and asked the people to use their own products, but the irony of the crane behind it was made in China. So much so that afterwards, the American media mocked that the dignified president of a country did not use his brain before doing things. He originally wanted to show his face, but accidentally exposed his butt. After this incident, China Manufacturing became a hit, especially Zhenhua Heavy Industry , which has become a household name in the United States.

New Bridge project components single tower columns and all steel bars were completed by Shanghai Zhenhua Heavy Industry in China. So why can Zhenhua Heavy Industry become popular and become popular? First of all, this is the first time in the history of American steel bridge construction that all the steel structures with extremely high quality requirements have been handed over to foreign companies. At the same time, this is also the first time that China's manufacturing industry has undertaken the construction of such a complex and large-scale bridge steel structure. All main steel structures of the bridge were produced in 2006 and were delivered on time in July 2011. This project lasted five years and was the longest cycle of all projects at that time. The construction of the Bay Bridge is very difficult. The steel structure used in the project is as high as 45,000 tons. Especially the single tower column weighing 13,000 tons must support the weight of 70,000 tons of the entire bridge. The seismic resistance is 8 magnitude, and it is the first of the world's earthquake resistance. It has a bicycle lane in the middle with a 12-lane two-way road. The bridge deck is 70 meters wide. According to the Guinness World Record, this is the widest bridge in the world. The widest part of the eastern section of the bridge is 78.74 meters. In addition to these, the United States has also put forward many difficult requirements for China. For example, when construction in the United States, welders must obtain technical certification from the American Welding Association, which means that the technical expertise is not enough and English must be good. However, Zhenhua Heavy Industry still chewed this hard bone. Not only that, some large Chinese equipment must be assembled before transporting to the Bay Bridge. First, it must pass through the Kinmen Bridge, but the height of the Kinmen Bridge is not allowed to pass. What should I do? You may not believe it. Chinese engineers calculated the exact time when the tide rises and falls of the sea water.The freighter was driven in at the lowest tide point of that quarter, just a few meters away from the Kinmen Bridge. Only the Chinese have the courage to do this. What is even more surprising is that the Bay Bridge project was completed in 2006 to 2011. Zhenhua was completed 5 months ahead of schedule, and all indicators fully meet the requirements of American owners. It can be said that this project has demonstrated the strength of our infrastructure maniacs.

Looking at the history of world bridge construction, we looked at Europe and the United States before the 1970s, Japan in the 1990s, and China in the 21st century. For China, no bridge cannot be built. Why do China have so many bridges? Because we have the biggest demand on this blue star. 67% of China's land area is mountainous, hills and plateaus, and there are giant mountains everywhere, especially the southwest region is almost all mountainous. There are many rivers here, and there are more than 1,500 rivers with a basin area of ​​more than 1,000 square kilometers. If you want to develop, you must cross these mountains and rivers, and building bridges here is the most convenient way.

From 2015 to 2020, China's transportation investment is expected to exceed 15 trillion yuan, and a considerable part of it is used for bridge construction. This is first of all due to the huge investment of the government. Bridges are often mainly invested by the government and cooperated with bank loans. This ensures feasibility first. Most super bridges are implemented by enterprises with backgrounds in various countries to ensure the smooth progress of the project. Especially for those bridges that are difficult to construct, only state-owned enterprises dare to undertake the contract. Why? Because they have very rich experience and strength.

China not only built many bridges in China, but we are not idle abroad. Among the top 10 bridges in the world, 8 belong to China, 5 cross-sea bridges in the world, 6 cable-stayed bridges in the world, and 7 suspension bridges in the world, 10 suspension bridges in the world. If ranked by bridge length, 9 of the top 10 bridges in the world are in China, while more than 80 of the top 100 bridges belong to China. It can be said that today's China is already the world's top presence in bridge construction. China Bridge is becoming a shining new business card for China, and the records it holds in the future are still being refreshed!