What are the two kinds of high-speed railways? Please briefly explain.

There are two kinds of high-speed railway: ballasted track and ballastless track.

1 Ballastless track

Ballasted track refers to the track under the track based on stone particle ballast bed, which is usually also called gravel ballast bed track, and is one of the main forms of track structure. It has the advantages of good elasticity, low price, convenient replacement and maintenance, and good sound absorption characteristics. However, compared with ballastless track, it also has some shortcomings, such as the track plane geometry is not easy to maintain, the service life is short, and the maintenance workload is heavy.

2. Ballastless track

Ballastless track, also known as ballastless track, refers to the track structure that replaces granular gravel ballast bed with concrete, asphalt mixture and other integral foundations. It is an advanced orbit technology in the world today. Compared with ballasted track, ballastless track has the advantages of avoiding ballast splash, good ride comfort, good stability, long service life, good durability and less maintenance workload, and the train running speed can reach more than 350 kilometers per hour.