Geometric Irregularity Prediction Model of Ballasted Track Considering Tamping and Grinding

Abstract:

The prediction of track geometric irregularity is the basis for the railway department to realize the transformation from periodic repair to state repair， which is the key to formulating the maintenance strategy. However， in the existing prediction models， the calculation is complex， and the impact of tamping， grinding and other composite operations on track irregularity is rarely considered. In order to improve the operation efficiency and prediction accuracy， considering the differences of different operation sections， taking the geometric irregularity deterioration function of ballasted track and the recovery function under tamping and grinding operation as the research object， the unique deterioration matrix of each section is formed by using numerical fitting and other methods， and the geometric irregularity prediction model of ballasted track under tamping and grinding combined operation is established. The results show that the established model is effective and the results meet the needs of field prediction.

Key words:ballast track;geometric irregularity;deterioration model;tamping operation;grinding operation