고속선에 사용된 PSC침목의 상태별 휨 보유내력 평가

초록

For quantitative assessment of flexural strength by crack condition of PSC sleeper, which is one of the main components of the ballasted track, 9 PSC sleepers used in Gyeongbu high speed railway line were sampled and static bending strength tests were conducted by EN 13230-2. The flexural strength of PSC sleepers with some mesh or longitudinal cracks was lower than that of new sleepers. In particular, the flexural strength of PSC sleepers with mesh-type cracks was less than 40% of the new sleepers’ flexural strength. The flexural strength of uncracked sleepers was similar to that of new sleepers.