# 궤도구조별 레일두부 표면요철의 성장 경향 분석

• 성덕룡 (서울산업대학교 철도전문대학원, 철도건설공학과) ;
• 공선용 (서울산업대학교 철도전문대학원, 철도건설공학과 (서울메트로 철도토목팀)) ;
• 김박진 (서울메트로 철도토목팀) ;
• 신효정 (서울메트로 철도토목팀) ;
• 박용걸 (서울산업대학교 철도전문대학원, 철도건설공학과)
• Published : 2009.05.21

#### Abstract

The Periodic replacements criterion of rail is calculated on the basis of the research result of RTRI in Japan. It is suggested that the service life of the continuous welded rail(CWR) is estimated by the relationship between the rail surface irregularity according to the accumulated passing tonnage and bending fatigue of welded part in CWR. In order to establish the periodic replacements criterion of CWR, this study measured the rail surface irregularity according to the accumulated passing tonnage, the types of track system and welding. Therefore, it is analyzed that the gas pressure welding is the worst one of the others. In addition, it is analyzed that the rail surface irregularity growth rate in ballast track is about $0.02{\sim}0.03mm$/100MGT and its in concrete track is about $0.005{\sim}0.02mm$/100MGT Finally, the result of this study is able to use the basis data to establishing the periodic replacements criterion of CWR considering rail grinding.