China's infrastructure conquered foreigners, and the cross-mountain bridge was built without any support. Engineers questioned: How did you do it?

With China's infrastructure construction building a cross-mountain bridge at the junction of Sichuan, Yunnan and Guizhou provinces, the German engineer bluntly said: This way of bridge construction, China can do it, this is really awesome, because China is building this bridge When crossing the mountain bridge, it did not provide any support for the bridge, and under the premise that the bridge can still be constructed normally without collapse, this time China's infrastructure has completely conquered the foreigners. So, how did China build such an arch bridge without support?

The bridge, which maintains its own stability without using supports for maintenance, is called the Jiming Three Provinces Arch Bridge, and it is called the Jilin Three Provinces because the bridge is located at the junction of Sichuan, Yunnan and Guizhou provinces, although the area looks quite Beautiful, but as a connection point on the Hengduan Mountains, the terrain on which the Jiming Three Provinces Bridge is located is so steep that before the bridge was built, people would have to detour for hours to pass through it.

Although people have not thought about building a bridge like Jiming Three Provinces to solve this traffic problem, it is not easy to build a bridge at this location: although the length of Jiming Three Provinces Bridge is not long, only a short 286.4 meters, but this bridge is not only located above a very deep canyon, the distance from the bridge deck to the valley bottom is nearly 1 km.

In addition, the rock structure on both sides of the Jiming Three-Province Bridge is also very unstable. As long as a relatively strong impact is caused to it, it will lead to the phenomenon of landslides in the fragile rock formations on both sides. If the bridge is built directly on such a fragile Above the rock formation, as long as the bridge needs to bear a little more weight, the whole bridge will peel off from the mountain wall along with the fragile rock formations on both sides, and then fall directly into the deep valley below 1 km height.

Therefore, before the construction of the Jinling Three Provinces Bridge, the Chinese carried out blasting work on the rock walls on both sides of the bridge, completely smashed and stripped the unstable rock formations on both sides, and built a strong enough foundation for the bridge. The base is solid enough, and the number of fragile rock formations blasted by China is as high as 120,000 cubic meters. From here, we can see how weak the rock formations here are.

Since then, China has prepared a corresponding steel cable bearing structure for the construction of this arch bridge. This system can not only provide support for the arch bridge that has not yet been built, but also, with the help of the sliding cables on the support tower, China has successfully transported a large amount of cement It will be transported to the construction surface of the bridge to ensure that there will be no shortage of raw materials during the construction of the bridge. As China successfully completes the construction of the Jiming Three-Province Bridge, China will build other bridges in similar harsh environments if it needs to be built. , such a construction difficulty may be lower than in the past.