The Yasi Expressway on clouds makes it easy to drive in mountains in southwest, and scenery is beautiful along the way.

The level of China's construction has always been known in world, and many poor countries need China to build various infrastructure. It's so good on street, but in China it can't be worse. All most difficult and dangerous places in China have been overcome by technology, convenient means of transportation have been built.

One of them is Yaxi Expressway, which is located in Sichuan Province, in mountains near Tibet, and connects Dalian Mountains and Hengduan Mountains. To say that this is a highway is better to say that it is a lifeline for people in mountainous areas and a road to prosperity for people in mountainous areas.

(1) Difficult to build

When people mention Sichuan, they may think of winding and confusing roads in nearby mountain town. As far as I feel, Iasi Expressway is such a confusing road too. It can be said that there is no place at all on this expressway that runs on flat terrain, and it is either a tunnel or a viaduct.

The lowest point is over 100 meters. Everyone knows that mountains in west are generally difficult and dangerous. They are high and intersect. You block me and I block you. It is very difficult to build roads. At same time, severe soil and climatic conditions in mountainous areas make it difficult to carry out general projects.

It can be said that building this expressway is indeed a last resort and we must bite bullet. Faced with all sorts of complex history, designers built bridges over mountains and built viaducts between mountains and rivers. Tunnels are built where bridges cannot be built, and tunnels are used to get directly to other side from one side of mountains and rivers.

In face of such high engineering complexity, it took more than a decade to formally complete entire project, and many new technologies were created that had not been heard of for a long time. Yaxi Expressway also contains many of best in world.

(2) Special Relief

Because mountains are everywhere, it can be said that terrain here is special. Almost all of highway is laid on mountain roads. This caused great difficulties in initial construction, not to mention various building materials, transportation and other difficulties, biggest difficulty is how to design.

If you want to build a winding mountain road, then immediately after passing this mountain, there will be another mountain next to it, and there is no buffer zone in middle. However, different mountains and rivers have different shapes and complex terrain, so it is difficult to plan a relatively gentle road.

As a result, engineering complexity here can also be called first in world. If you're interested in statistics, you'll find that this expressway has a total of over a dozen mountains and rivers, over a dozen tunnels, and over a dozen viaducts.

I can't figure out exact number yet. But along way, simple statistics, we see how much effort was invested in construction here.

(3) Points at high speed

If driver pays more attention to navigation, he will find that on a certain section of road, navigation takes a long detour, and then detours and then detours again. glasses. When you meet someone who doesn't understand you, you can just start scolding them. Isn't this a waste of our time and energy?

Who doesn't need money for a gas station? My suggestion is never to be that kind of person when we don't understand, we should be asking instead of venting our emotions at will. The reason for such a special relief is that slope of the mountains and rivers is too high here.

On normal stretches of expressways, every time we travel a certain distance, height of mountains and rivers rises by one level. This means that you are sort of climbing all over highway, and if you come across steep mountains and rivers, you will not be able to climb them at all.

It's like winding mountain road you've seen that always goes in circles, climbing slowly up, why not build road right along side of mountain? Because human vehicles have not yet reached a slope that can climb such a slope, and some slopes have even reached 90 degrees upwards. Before car could go up, it fell straight down.

Therefore,this point-shaped road construction method also avoids steeper slopes of a mountain road by driving in circles so that car can move more smoothly. The reason there are two circles is because there are two high mountains on this stretch of road. Thanks to this circle, he not only saves costs, but also can successfully cross two high mountains.

Of course, you can't build a viaduct between these two mountains, but have you ever seen a viaduct more than 200 meters above ground? Everyone is afraid, right? At same time, area is home to National Natural Scenic Preserve, which cannot be destroyed, so this glasses-shaped design is the most practical.

Of course, you need to pay attention to turns in tunnel. Since there are too many turns here, if you don't pay attention, you can hit wall. There will be many colored lights in tunnel to remind you that there is a turn ahead. Drivers and friends, please stay awake, don't drive tired, and pay attention to indicators. I wish you all to safely pass this section of road.