A comparison study for the track maintenance system for the non-ballast steel plate bridge

무도상 판형교 레일 장대화에 따른 궤도 유지관리 비교연구

  • 남보현 ((주)철도안전연구소) ;
  • 장태철 (한국철도공사 대구지사 시설팀) ;
  • 우용근 (한국철도공사 부산지사 시설팀) ;
  • 민경주 (코레일트랙(주))
  • Published : 2007.11.08


Form the application of long rail system the non-ballast steel plate bridges, fatigue strength increase and rail noise reduction can be expected. This is mainly form the reduction of the rail impact at the rail joint locations which already made to behave together from welds. In the high speed rail, application of long rail system is essential because without long rail system, the required serviceability level can not be achieved. But even with this long rail systems, the thermal expansion from the girder can not be absorbed in the normal bearing systems, and these expansion cause between girder and rail. Also unexpected rail buckling and fracture through rail thermal tension may happen. It was found through numerical analysis and field measurement that these problems can be avoided by semi-fixed bearing system. In this study, the benefits of non-ballast plate bridge through long rail system, especially at the point of girder stability, girder stiffness increase and bearing maintenance will be reviewed.