경부고속철도 콘크리트궤도의 균열 및 손상 유형

In the entire 2nd phase section(Dong-Dae-Gu~Busan) of Kyeong-Bu high-speed railway that was open in 2010, the concrete track has been installed. In Korea, because of insufficient experience on the concrete track, systematic maintenance standards should be established in the future. For this purpose, this paper investigated patterns of crack and damage occurred in the concrete track of Kyeong-Bu high-speed railway. According to the field investigation, cracks in concrete slab (TCL) are the most frequent, which develop following the interface between PC sleeper and TCL, and show the highest frequency on the earthwork. The separation of PC sleeper and TCL was observed in some area. Cracks in PC sleepers were also observed in some area, but the frequency was very low relative to the cracks in TCL. Based on these results, the causes and countermeasures on each type of cracks and damages were discussed.