Characteristics of slab ballastless track

It has the outstanding characteristics of ballastless track, which can significantly reduce the maintenance workload of the line.

Judging from the weight per linear meter of track structure, it is smaller than that of ballasted track, while slab track structure has low height, small ballast width and light weight. Compared with the track, the frame slab is a non-prestressed structure, which is convenient to manufacture. It can save steel bars and concrete materials, reduce the second-stage dead load of the bridge, and the cost is low, but it does not reduce the effective strength of the track slab actually bearing the train load and does not affect the transmission of the train load. When used in tunnels, the tunnel excavation section can be reduced.

Compared with the Borg slab track in Germany, the Japanese slab track is different from the Borg slab track in longitudinal connection because it is provided with bumps. The convex abutment is built together with the foundation concrete slab, and the track slab is positioned by the convex abutment, so the construction is more convenient. There is no mechanical polishing process in the factory for the track plate used for slab track in Japan, so the manufacture is relatively simple. Various types of slab track are widely used in bridges, tunnels and some subgrade sections of Shinkansen in Yang Shan, Northeast China, Shang Yue, Hokuriku and Kyushu.