Effect of Seasonal Variation on the High Speed Track Quality

The ballast track was constructed in full operation line excpet of 3 long tunnels in Gyeongbu - high speed railway 1st stage section. Due to the characteristics of operation of vehicle and ballast track, the track maintenance cost has been disbursed from beginning of the opening. Especially, the ballast track is considerably influenced by other environmental effects and requires additional maintenance owing to the occurrence of the frequent track irregularity. In this study, the variation of track quality was observed according to seasonal variation as a basic research for analyzing the effect of environmental factor on track irregularity.