At the end of 20 18, the total railway mileage in China has reached132,000 kilometers, while the total high-speed railway mileage in China has exceeded 30,000 kilometers, which is more than the total mileage of other countries combined, which can be said to be remarkable.
It can be said that the rapid economic development in China in recent years is closely related to the construction of high-speed rail. You know, the development of high-speed rail technology in China is relatively late. When we started to study high-speed rail, in fact, many countries in the world already had relatively advanced technology, but it only took China more than ten years to develop the mileage of high-speed rail into the first in the world, and China's high-speed rail won't drop a coin vertically in the marching project. It has also won praise from many countries. According to the ranking of high-speed rail construction technology, China ranks second in the world. In this case, many people will ask questions. China's high-speed rail performance is so good, but it can only rank second. So which country ranks first?
Development course of China's high-speed railway
In recent ten years, China has been far ahead in high-speed rail technology and operation. When riding the high-speed rail, people will no longer hear the friction between the wheels and the rails, and people will not feel shaking when standing in the high-speed rail car. The main reason is the tracks of the high-speed rail.
This technology can be said to be patented in China. There is no rail joint on the whole high-speed rail, and the length of the whole rail can be as long as tens of kilometers. Because there is no gap, this is an experiment that coins can't stand up.
Then the whole track is tens of kilometers long. Can it be processed? In other words, it can be processed, and then how to avoid the damage caused by thermal expansion and cold contraction.
In fact, the whole rail is not tens of kilometers long, and the reason why the rail gap can't be seen lies in the domestic key technology, which uses high-strength elastic fasteners to buckle the bottom of the rail, so that the rail will not be deformed due to thermal expansion and cold contraction.
After that, the rails are welded by a seamless rail welder. The temperature of the two rails rises to more than 1000 degrees, and then the rails are firmly squeezed together by external force.
It can be said that mastering this technology has also provided a major guarantee for China to dare to increase the speed of high-speed rail again and again. Other countries have studied China's high-speed rail and know the reasons, but they still can't get on the train because the technology is not in place.
Overview of world high-speed railways
As the main mode of travel and transportation in modern society, high-speed rail can replace the original train to some extent, mainly because it is faster and cheaper than airplanes, which is very important for some countries or individuals who have great demand for transportation and high timeliness requirements. After all, time is money.
At present, there are three countries with advanced high-speed rail technology in the world, namely Japanese, German and China. Needless to say, China is one of them. First of all, talk about Japan.
In fact, Japan is one of the first countries to build high-speed rail in the world, and has also made good achievements in the field of high-speed rail. However, due to the limitation of land area, the total mileage of Japan's high-speed rail is only 2000 kilometers, which shows that there is not much room for the development of Japan's high-speed rail industry.
As a world industrial manufacturing power, Germany is ahead of the world in industrial manufacturing, and high-speed rail is no exception. Although the total mileage of high-speed rail is only 3000 kilometers, Germany's high-speed rail is the most advanced in the world, and Germany has always attached great importance to environmental protection, which is also reflected in the high-speed rail. The energy consumption of German high-speed rail is less than 2 liters per 100 kilometers, which also makes German high-speed rail technology rank first in the world.
Of course, although German high-speed rail technology ranks first in the world at present, China high-speed rail is second to none in terms of safety and stability. In the past ten years, there have been no major accidents, which shows the superiority of China's infrastructure.