Abstract
In recent years the destructive force to the track has increased with the rise of train speed and the increase in the number of trains, therefore more labour and expenditure are needed to maintain the track in good condition. The purpose of this study is to develop an economical and reliable low-maintenance track structure. The authors proposed a concrete roadbed system for slab track which could be laid on embankments and cuttings. This paper describes the history and present status of slab track, proposal of the new track structure, test-laying and its performance tests of full-sized track, the test under train running at Hokuriku Shinkansen line. (A)