The large machinery tamping has become the main means of ballast line maintenance,which can effectively improve the smoothness of the line and ensure the safe and stable operation of the train.This paper uses the dynamic detection data of the comprehensive inspection vehicle of Jinhua railway,combined with the actual situation of the site,to analyze the variation pattern of the TQI(track quality index)of the large maintenance machinery,and to propose the MTQI(maintenance track quality index)which can be used to guide the tamping maintenance,thus optimizing the tamping maintenance operation of large machinery of Jinhua railway.The paper also put forward some innovative suggestions for the preparation of large machinery tamping maintenance plan.
large machine tampingballasted linetrack quality indexmaintenance track quality indexmaintenance plan