The middle track bed of Type III concrete sleepers should not be hollowed out, but the ballast in the middle of the sleeper box should be filled flat.

Due to feedback on the ∥ – type sleeper on site, there have been defects such as transverse cracks on the top surface of the sleeper in the middle, longitudinal cracks along the bolt holes, cracks at the end of the sleeper, longitudinal horizontal cracks on the side, and diagonal cracks on the shoulder.

The average annual failure rate of rail sleepers is 1.

Precision Sheet Metal Fabrication

2%, which is difficult to adapt to the bearing conditions of heavy and extra heavy tracks.

The design speed of Type III concrete sleepers is 160km/h, with 1760 sleepers per kilometer, mainly suitable for heavy-duty tracks.

.