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Experimental Study on Characteristics of Track Settlement Depending on Components of Ballast Track

자갈도상 궤도 구성품에 따른 궤도 침하 특성에 대한 실험적 연구

  • Kim, Man-Cheol (Advanced Infrastructure Research Team, Korea Railroad Research Institute) ;
  • Bae, Young-Hoon (Advanced Infrastructure Research Team, Korea Railroad Research Institute) ;
  • Lee, Si-Yong (Korea Development Corporation) ;
  • Park, Yong-Gul (Graduate School of Railway, Seoul National University of Science & Technology)
  • Received : 2015.09.28
  • Accepted : 2016.07.27
  • Published : 2016.08.31

Abstract

As a basic study to develop maintenance-effective optimal ballast track in preparation for upgrading a conventional line to a high speed railway, a full-scale test that combined the components of ballast track was conducted and the characteristic of track settlement was analyzed. As a result of the full-scale test, reduction in maintenance via an increase of the elasticity of only the pad was insignificant; however, the effect increased significantly with increasing of the weight of the sleeper or with increasing of the weight of the sleeper and the thickness of the ballast together with use of a pad with high resiliency. An optimal type of ballast track, in line with upgrading the speed of a conventional line, shall be developed through cost efficiency analysis considering the maintenance cost depending on the track settlement as well as the initial construction cost.

간선철도 고속화에 대비하여 유지보수를 고려한 최적 자갈도상 궤도구조 정립을 위한 기초연구로 국내 자갈도상 궤도 구성품들을 조합한 실대형 시험을 실시하여 궤도 침하 특성을 분석하였다. 실대형 시험 결과 유지보수 저감을 위해서는 패드만을 고탄성화 하였을 경우의 효과는 미비하였으며, 패드의 고탄성화와 더불어 침목 중량화 또는 침목 중량화 및 도상두께를 증가 하였을 경우에 그 효과가 크게 나타났다. 간선철도 고속화에 따른 최적의 자갈도상 궤도구조는 초기 건설비와 본 논문에서 제시한 궤도 침하 특성에 따른 유지보수비를 고려한 경제성 분석을 통해 최종 정립되어야 할 것이다.

Keywords

References

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