Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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Experimental Study for Establishing Rail Grinding Period in the Urban Railway

도시철도 레일연마주기 산정을 위한 시험적 연구

  • Received : 2010.04.01
  • Accepted : 2010.07.05
  • Published : 2010.08.26
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Abstract

The defects of rail head induced by fatigue and deterioration are mainly classified by two types ; one occurred on the surface of rail head the another occurred on the inner rail head. This study performed the surface irregularity measurement of rail head according to the passing tonnage in the urban railway. Also, we carried out microscopic structure test, chemical component test and micro-hardness test for the specimen which is the used rail on metro line by accumulated passing tonnage. As a result of this study, for new rail, it should be performed initial grinding in order to remove 0.3mm of de-carbonized layer. The preventive-cyclic grinding for preventing RCF defects is proposed two options : grinding by the whole line and grinding by specified sections.

레일 피로 열화손상유형들은 크게 레일표면에서 발생하는 결함들과 레일내부에서 진전되어 발생하는 결함들로 구분되어질 수 있다. 본 연구에서는 국내에서 연간 누적통과톤수가 가장 많은 도시철도의 운행조건을 고려하여 현장측정을 통해 레일표면 요철성장률을 분석하였으며, 연마 후 누적통과톤수에 따른 시험편을 현장에서 발췌하여 현미경을 이용한 조직검사, 화학성분검사, 마이크로 비커스 경도시험을 수행하였다. 시험결과 신품레일의 경우 유효탈탄층 제거를 위해 약 0.3mm의 초기연마를 시행해야하며, 예방연마의 경우 전구간을 일괄적으로 연마할 경우와 특정 구간별로 구분하여 연마할 경우에 대하여 2가지 방안을 제시하여 레일표면에서 발생하는 RCF결함을 예방하거나 제거할 수 있도록 제시하였다.

Keywords

References

  1. A.M. Zarembski (2005) The art and science of rail grinding, Simmons-Boardman Book, Inc.
  2. S. Kumar (2006) A study of the rail degradation process to predict rail breaks, Lulea University of Technology.
  3. M. Ishida (1999) Experimental study on the effect of preventive grinding on RCF defects of Shinkansen rails, IHHA'99 STS-Conference.
  4. Tadashi DESHIMARU (2006) Estimation of Service Life of Aged Continuous Welded Rail, QR of RTRI, Vol. 47, No. 4, Nov.
  5. Bernhard Lichtberger (2005) Track compendium, Eurail press
  6. Coenraad Esveld (2001) Modern railway track - second edition, MRT-Production.
  7. Korea Railroad Research Institute (2006) A Study on Establishment of the Rail Grinding Criteria(레일연마기준 수립에 관한 연구보고서), Korail
  8. M.C. Kim, T.K. Kang (2008) Rail Grinding Criteria of Kyeong-Bu High-Speed Line for Effective Rail Maintenance, Journal of the Korean Society for Railway, Vol. 11 No.3, pp. 272-279.
  9. Graduate School of Railway (2009) Development of Track System for High-Speed Train(고속화를 위한 선로구축물 핵심기술개발 연구보고서) Korea Institute of Construction & Transportation Tech. Evaluation and Planning.
  10. Y.G. Park, S.K. Suh, J.Y. Choi (2003) Logicality Estimate for Domestic the Periodic Replacement Criteria of CWR based on Accumulated Passing Tonnage, Journal of the Korean Society for Railway, Vol. 11, No. 3, pp. 143.
  11. Graduate School of Railway (2009) A Study on the Maintenance and Estimate of Fatigue Life for Used Rail(노후레일 피로손 상 평가 및 유지보수방안 연구보고서), Seoul Metro.
  12. KS D 0216 : Methods of measuring decarburized depth for steel(강의 탈탄층 깊이 측정 방법).
  13. KS D 1652 : Iron and steel-Method for spark discharge atomic emission spectrometric analysis(철 및 강의 스파크 방전 원자 방출 분광 분석 방법).
  14. KS R 9106 : RAILS(보통레일에서 정한 화학성분검사 방법)
  15. MLTM Railroad Policy Division(국토해양부 철도산업과) (2005) Maintenance Standard for High-Speed Railroad, No. 37(Rail grinding)(고속철도 선로정비지침 제37조(레일연마)).