Why is the high-speed rail line curved? It is said that the straight line between two points is the shortest. How about straightening it? It costs so much money to build the high-speed rail line, but it costs more money to turn a corner. Is it not a loss?
In fact, the reason why the bend, there is a most important purpose, is to benefit us.
China's high speed rail is our representative project. We should all take high speed rail. Do not know what high speed rail your hometown has? The 350km/h high-speed train has condensed the journey of days into a few hours. And the construction of high-speed rail, the cost is not cheap. According to our current prevailing price, one kilometer of high-speed rail costs 160 million yuan, which is still the least. So the first reason why the bullet train is curved is to save money.
They say it's curved to save money, right? How is it possible to save money when you have to spend more money by taking such a long detour? Yes, between two points, the shortest distance is a straight line. In terms of the length and cost of the line, it does cost more money. But we're missing the most important thing, the terrain 39bet-đua chó-game giải trí -đá gà-đá gà trực tuyến-đánh bài. China has a vast territory and abundant resources. The plateau basin, like the familiar Qinling Mountains, has a height of 3,771 meters, and the geological conditions are complex. There are countless mountains similar to the Qinling mountains. If we build a straight line, it is necessary to cross the mountains. In other words, to build the high-speed rail, a mountain would have to be held out, and the cost of this project is unimaginable. A friend asked, how much does it cost to dig through a big mountain? For example, the construction of the Daejushan Tunnel through the Hengduan Mountains cost more than 200 billion yuan. In contrast, the cost of building a bridge is much less, and if it is built on a plane, it will be cheaper.
So, when building a high speed rail, never wear mountains unless necessary. Meet the mountain, can hide, so around a big bend. Results? But where to go? Go where the people are!
Which brings us to the second reason for the bullet train bend, which is to benefit us. Now almost every big city in China has high-speed rail. Do you have a hometown? As long as the densely populated city, basically it can enjoy the benefits of high-speed rail. Therefore, the detour of high-speed rail is to try to make every Chinese, basically at home, can take high-speed rail, so that every Chinese can enjoy the benefits of high-speed rail.
At the same time, let's zoom in. High-speed rail links densely populated and economically developing cities, which can also greatly promote population mobility, trade and economic development. From another point of view, it is also for the purpose of attracting more people and making more profits. If it is built in a sparsely populated area with no passengers, it will be a big loss.
But as for the high-speed rail bend, another voice says that it is to solve the problem of thermal expansion and cold contraction stress. Is this right? I can tell you very clearly, no.
Imagine a regular train track that bends, is that also to solve stress problems? If so, why do ordinary train tracks have gaps and stones to relieve stress? So, this is not true. High speed rail has no seams, so stress relief is achieved by locking the rail at certain temperatures to maintain a controlled degree of deformation, expansion regulators and stress release.
Now China's high-speed rail development is getting better and better. Not only is there a 620km/h HTS train, but a 4000km/h train is also under study. Do you feel excited about it?