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일반철도 노반 강성조건에서의 고속철도용 콘크리트 궤도의 적용성 검토

Evaluation on the Applicability of the Conventional Roadbed Stiffness for High Speed Concrete Track

  • Lee, Jin Wook (High-speed Railroad Systems Research Center, Korea Railroad Research Institute) ;
  • Lee, Seong Hyeok (High-speed Railroad Systems Research Center, Korea Railroad Research Institute) ;
  • SaGong, Myung (New Transportation Systems Research Center, Korea Railroad Research Institute) ;
  • Lyu, Tae Jin (High-speed Railroad Systems Research Center, Korea Railroad Research Institute)
  • 투고 : 2012.08.27
  • 심사 : 2013.01.08
  • 발행 : 2013.02.28

초록

국내 철도노반설계기준에는 강화노반 두께를 일반철도와 고속철도로 이원화하여 규정하고 있으며 강화노반의 입도기준도 이원화되어 있다. 이로 인해 향후 기존선 속도향상 또는 유도상 궤도를 무도상 궤도로 변경 시 강화노반 두께증가 및 재료변경으로 인한 비용증가가 요구된다. 따라서 본 논문에서는 실대형 실험을 통하여 노반상태 변경 없이 기존 일반철도인 유도상 궤도를 무도상 궤도로 변경하고 동일선로에서의 열차속도 향상 가능성을 검토하였다. 일반철도 설계기준에서 제시하고 있는 강화노반 두께를 20cm로 하고 강화노반 재료를 입도조정부순골재(M-40)를 사용한 선로 노반의 동적 특성을 분석하고 철도설계기준에서 제시하는 노반침하를 비교한 결과, 기존 일반철도 자갈궤도의 강화노반 두께 및 재료 변경 없이 무도상 궤도화가 가능하며 열차속도 400km/h까지 주행이 가능한 것으로 나타났다. 이러한 결과는 실내실험만의 결과이므로 추후 수치해석과 현장 실측치와의 비교 검토가 필요하다.

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