Study on the Appropriateness of Track Maintenance Works through the Evaluation of Trackbed Conditions

도상 및 노반상태 평가를 통한 궤도유지보수작업의 적정성 연구

  • 김대상 (한국철도기술연구원, 궤도토목연구본부) ;
  • 권순섭 (남광토건, 토목사업본부) ;
  • 이수형 (한국철도기술연구원, 궤도토목연구본부) ;
  • 황선근 (한국철도기술연구원, 궤도토목연구본부) ;
  • 박태순 (서울산업대학교, 토목공학과)
  • Published : 2008.06.30

Abstract

Ballast track needs maintenance works because it is supported by the compressible trackbed and subgrade layers. Maintenance works are essential to secure riding comfort and extend the life cycle of it. The necessities of maintenance works are determined from track irregularities measured by EM120. Track irregularities is the results of the track deformation. Therefore, it is natural to evaluate the cause of it. This paper focuses on the points the track irregularities come from the trackbed and the subgrade. Nondestructive techniques, such as Ground Penetrating Radar (GPR) and Portable Falling Weight Deflectometer (PFWD) are applied to evaluate the trackbed conditions, ballast layer thickness and vertical track stiffness, in the test section 500m long of Gyungbu line. The trackbed investigation results are compared with the track irregularities measured by EM120 and maintenance works. Conclusively, it was found that some maintenance works were unnecessary on the test section.

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