Why do high-speed rail tracks have to be built on viaducts?

Edit:Zongxiang Heavy Industry--Lucas Date:2020-05-20 10:27:05

Many small partners have been on high-speed rail, but I don't know if they have noticed a strange phenomenon, that is, high-speed rail tracks are often built on viaducts. Sometimes, when they clearly see that the high-speed rail passes through flat ground, they still lay tracks on the bridges.  We know that the cost of high-speed rail construction is very high, so why choose this time-consuming and laborious method? standard rail for railway

Due to the high-speed train's running speed is too fast, up to 350 kilometers per hour, this flying speed on the track, the flat and stable requirements on the road surface is very high, if there is a little bit of influence, the light will lead to train bumps, and the heavy will lead to train jumping accidents.  The ground on ordinary land is difficult to meet the operational requirements of high-speed rail, so it is simply on the viaduct to lay the track in accordance with the required standards.  Moreover, high-speed trains are often safer to run straight than to turn. The state has set strict standards for the bending degree of high-speed railway lines. The minimum curve radius of 350 kilometers per hour is 7 kilometers. There may be special terrain on ordinary land that requires many turns to be laid, but there is no such concern on viaducts.  Another advantage of laying track on viaduct is that there will not be obstacles such as small animals, garbage and rocks on the ground, which also improves the safety factor of train operation. standard rail for railway

After all, the high-speed rail technology has only been popularized and applied for 10 years. This is a new type of transportation mode. Before this, many flat areas used ordinary railways. The transportation network in many places has already taken shape and it is difficult to make major structural changes. Therefore, it is simply necessary to directly build viaducts, lay tracks and let the high-speed rail speed on the viaducts.  In addition, if the high-speed railway is built on flat ground, it will occupy a large amount of land resources, while if it is built on viaduct, the ground only needs to occupy the location of several piers.

I think now we all know the reason why high-speed rail must be built with high-speed rail bridges. standard rail for railway

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