A summary of railway track rectification and grinding wheel for track grinding;

Introduced in this paper are the performance,dimensions,main structure and application of the box car type P 31 applied on the meter gauge railway.

To master in time the status of railway track geometry under repeated train loads,modern track inspection car and computer processing techniques are adopted to inspect it and evaluation standards concerned are established in many countries.

This paper analyzed the characteristics of the four components such as the main strengthened material wood resid- ual,the auxiliary strengthened material glass fiber,the main body material phenolic:resin and the filled material industrial ashes, and discussed their effects on the whole characteristic of railway sleeper composites.

Four kinds of structure design schemes are presented based on the researches to the composite properties,structure design principles and processing techniques requirements of railway sleeper composites.