• Title, Summary, Keyword: 궤도 유지관리의사결정

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Correlation Analysis Between Crack and TQI in RC Slab Track (철도콘크리트 슬래브 궤도상의 균열과 TQI 상관성 분석)

  • Kwon, Sae Kon;Park, Mi Yun;Kim, Doo Kie;Park, Jae Hak
    • Journal of Korean Society of Disaster and Security
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    • v.5 no.2
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    • pp.71-79
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    • 2012
  • Recently, in the total railroad construction field, the concrete slab track is adapted, not ballast track. Because the ballast track have the characteristics doing the ongoing maintenance and difficult to handle increasing maintenance costs, eventually the concrete slab track is selected as an alternative. However, owing to the hydration heat reactions and temperature affected shrinkage cracks related to concrete itself, a variety of studies to solve maintenance problems related to concrete slab track are underway. This study analysed characteristics of TQI values evaluating the track irregularity, searched the relationship between crack progress and TQI, and then evaluated of the correlation between the two values. Through this method, there is a need to complete the problems of the current method, only TQI is the main decision making tool in track maintenance, and also the need for the development of evaluation index considering the crack.

Analysis of Life Cycle Costs of Railway Track : A Case Study for Ballasted and Concrete Track for High-Speed Railway (철도 궤도의 수명주기비용 분석 : 고속철도 자갈궤도와 콘크리트궤도 사례 연구)

  • Jang, Seung Yup
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.20 no.2
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    • pp.110-121
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    • 2016
  • In the decision-making, such as selection of structure, construction method, or time and scheme of maintenance, the evaluation of life-cycle cost(LCC) is of great importance. The maintenance cost occupy a large portion of the LCC of the railway track as well as the initial construction cost. Futhermore, the proportion of the maintenance cost is much higher in the ballasted track. Thus, the importance of the LCC evaluation is higher than in any other engineering structures. In this study, a LCC model that can consider various design parameters such as the type of track structure, annual traffic volume, axle load, train speed, and proportion of curve sections and engineering structures has been developed. Fundamental data for calculating costs also have been presented. Based on the model and data proposed, the trends in the variation of LCC according to the design parameters were examined and the most important design parameters in the LCC analysis of railway track were investigated. The results show that the proportion of renewal and operational costs is much higher in the ballasted track than in the concrete track, and the annual traffic volume and ballast taming period are most significant factors on the LCC of the ballasted track. On the contrary, it is revealed that the proportion of the initial construction costs in the concrete track is much higher, and the LCC of the concrete track is less sensitive to the traffic volume, train speed, and axle load.

Decision-making support system for track maintenance (궤도 유지관리 의사결정 지원 시스템 개발)

  • Lee, Jee-Ha;Rim, Nam-Hyoung;Yang, Shin-Chu
    • Proceedings of the KSR Conference
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    • pp.454-459
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    • 2003
  • The process of determining whether, when, where and how to intervene, of deciding on optimum allocation of resources and minimizing the cost is a very complex problem: different track sections tend to behave differently under the effects of loading; decision-making processes for maintenance work are closely interrelated technically and economically; decision-making for maintenance plans is based on a large quantity of technical and economic information, extensive knowledge and above all experience. For that reason, It is considered very important to develope objective and computer-aided decision-making support system for track maintenance plan. On this paper, we reviewed ECOTRACK system and present the plan of develope decision-making support system for track maintenance appropriate to local condition.

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