Concrete sleepers, also known as sleepers, are also a type of railway fittings. But the material used now is not only wood, so the sleeper is more scientific. Do not look at the shape of the sleeper monotonous, the appearance is not amazing, its role can not be small. The sleeper not only supports the rail, but also maintains the position of the rail, and transmits the huge pressure transmitted by the rail to the track bed. It must have a certain degree of flexibility and flexibility, hard to do, not soft. When the train passes, it can be properly deformed to cushion the pressure, but the train must be restored as much as possible.
The spacing of the sleepers should be determined according to conditions such as traffic volume, driving speed and type of track bed. When the spacing is small, the force applied to the subgrade, the track bed, the rails and the sleepers themselves are small, but the spacing is too small to increase the engineering cost and affect the tamping operation of the track bed. The spacing of the sleepers is generally 52 to 62 cm.