Why should steel rails be laid on gravel?

Generally speaking, railway tracks are laid on gravel. Then why should the steel rail be laid on gravel instead of directly on the ground?  After consulting the data, I found the following reasons:

1. The weight of the vehicle can be spread on the subgrade surface through the diffusion of steel rail, sleeper and ballast bed, which plays a role in protecting the subgrade. railroad track for sale

2. Provide resistance to longitudinal and transverse resistance of rail rows and maintain the correct geometric position of rails, which is especially important for CWR.

3. It can be used to drain rainwater and reduce vibration and floating dust when trains pass by.

4. Provide certain elasticity and damping to play the role of buffering and damping. railroad track for sale

5. Irregular arrangement of crushed stones can decompose the pressure of the track in different directions to make the track more stable.

6. Gravel can absorb noise and heat and prolong the service life of rail.

The ground flattened by mud is easy to deform, which will cause the train to bump up, while paving stones will make the road surface flat and the train will run safely and smoothly.  Even in winter, the rail will not be lifted due to water freezing and expansion, and the interference of weeds will be prevented to ensure smooth running of the train. railroad track for sale

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