China's infrastructure, who will compete with China, now no country in the world can compete with China in the field of infrastructure construction. Now this project in China is on fire again. With an investment of 1.5 billion, China has built the world's tallest bridge in just three years. It is the Pingtang Bridge. Even foreigners are impressed. So how difficult is it to build this bridge? Woolen cloth?

The Pingtang Bridge is located in Qiannan Buyi and Miao Autonomous Prefecture, Guizhou Province, China. As a city in the southwest region, Guizhou is located in a location that has been inconvenient for transportation since ancient times. Because of the steep terrain, it is not suitable for building roads and bridges, due to lack of communication with the outside world. As a result, the city once belonged to a relatively backward province. However, as China's poverty alleviation battle deepens, the improvement of the local transportation environment in Guizhou has not been left behind, so this world-renowned bridge appeared.

The location of this bridge, which is missed by the local people, is very dangerous. It was built on a canyon with a considerable span. If it encounters cloudy and foggy weather, the canyon is filled with fog. Driving on the bridge may even cause The feeling of driving on the cloud, so the Pingtang Bridge has also won the reputation of the Cloud Bridge. Under normal circumstances, no country would think of building bridges to cross the canyon, but China’s infrastructure has made the impossible possible. The Tang Super Bridge is divided into four parts: the main bridge, three pylons, piers, and cable stays. The most striking design is the three identical pylons. The special shape and color match form a beautiful scene with the surrounding environment. Landscape.

However, the biggest problem in the construction process is precisely the construction of these three bridge towers. You must know that their height is about 300 meters. That is to say, if you want to build such a high bridge tower, it is not a piece even on flat ground. The easy thing, let alone in the canyon, and there is a clear difference between the three-tower cable-stayed bridge and the two-tower cable-stayed bridge. The difficulty difference is not one and a half. There are no auxiliary piers or transition piers between the pylons of this kind of cable-stayed bridge. It is difficult to form effective constraints on the middle bridge tower, so that the cable stress and pier bending moment will increase significantly. If the bridge design is unreasonable, it is difficult to ensure the stability of the overall structure.

In addition, when building a bridge in a canyon, you must also consider the impact of wind on the bridge body. The special environment in the canyon makes it easy to form strong winds, and wind is the main factor affecting the safety of the bridge. There is a bridge in the United States because How does the Pingtang Bridge Cope with the impact of wind? In order to ensure that it can stand tall in the wind, the bridge adopts a wind-sensitive structural design, which can effectively cope with strong winds below level 12. Considering the mountainous environment of Guizhou, typhoons can hardly affect this area, so this design can completely Ensure the safety of the bridge during strong winds.

The Pingtang Bridge has effectively improved the local transportation environment in Guizhou, and has great positive significance for poverty alleviation in the rocky desertification areas of Yunnan, Guizhou and Guangxi. It has once again proved China’s bridge construction capabilities in front of the world. Bridge construction has accumulated valuable experience, and the development of infrastructure construction is far from stopping. Successes this time have also inspired scientific research workers and working people to make persistent efforts and create greater glories. Editor/Tian Zengpeng