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Unique technology and process of subway prestressed concrete track slab
What does the gravel under the train tracks do? Why are there no high-speed rail tracks?
Release time:
2021-07-08 08:55
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Friends who have taken trains and high-speed rails must be very familiar with the track, but most of the time we pay more attention to the train or the high-speed rail itself. Few people pay attention to the track. I wonder if you have carefully observed it, my friends? If you look carefully, you will find that there is a layer of gravel under the train track, but there is no under the high-speed rail track. Why is this? My heart is full of 100,000 whys...
There are two types of rails, one is called ballast lane and the other is called ballastless lane. How to distinguish? - See if the track is covered with ballast. Generally, a ballasted track is covered with a layer of ballast, and this kind of ballast is laid gravel. And this kind of ballasted lane is for the train.
Friends who have taken trains and high-speed rails will definitely have a deep feeling - the train will have a certain degree of vibration during the process of running. In order to reduce the vibration of the train, these gravel will be spread to make the train run more smoothly, which can ensure the safe running of the train to a certain extent, and can also reduce the construction cost.
Why is the high-speed rail very stable? The high-speed rail is a long-rail train. Unlike the train, there are certain gaps between each carriage. Each carriage of the high-speed rail is closely connected. Therefore, when taking the high-speed rail, we can feel It is much more stable, and you can even stand coins on the high-speed rail window stand, of course, there is no need to lay gravel on it.
Another point that needs to be said is that the speed of high-speed rail is much faster than that of trains. Now the speed of high-speed rail in China has reached 300 kilometers per hour. If you lay gravel on it, because the speed is too fast, the gravel is likely to be carried. It is also unsafe to a certain extent, and therefore, not only will gravel not be laid on the track of high-speed rail, but also gravel will not be allowed to exist.