• Title, Summary, Keyword: rail-transport operation control

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A Study on the rail-transport operation control for railway embankment under rainfall (강우시 철도성토사면의 열차운전규제기준에 관한 연구)

  • 김현기;박영곤;신민호;김수삼
    • Proceedings of the KSR Conference
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    • pp.514-519
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    • 2001
  • There are a close relationship between natural disasters and train safety. So it is very important to guaranty train safety using reasonable rail-transport operation control against disasters. Therefore, based on the past record of rainfall at failure, rail-transport operation control for railway embankment under rainfall was set up. After slope check list at home and abroad had been analyzed, new slope check list was suggested and site investigations were carried out using this check list. In order to evaluate the stability of railway slopes under rainfall, explanatory variables and subordinate variables were selected for multi-variate analysis and critical rainfall was defined by statistical process. Rail-transport operation control including regional and geological properties was suggested by analyzing the critical rainfall and rail-transport operation control in other country, and this will be a good tool to control train speed under rainfall and to secure train safety.

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Rail Transport Operation Control for Railway Embankment under rainfall (강우시 성토사면의 열차운전규제기준)

  • Kim, Hyun-Ki;Shin, Min-Ho;Choi, Chan-Yong
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.225-232
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    • 2009
  • Infiltration of rainfall causes railway slopes to be unstable and may result in failure. Basic relationship between the rainfall and stability of railway embankment is defined to analyze its stability by rainfall. An experimental study for defining of infiltration rate of rainfall into slope is conducted in the lab. The results of Rainfall infiltration show that rainfall infiltration is not equal to infiltration as like reservoir because rate of rainfall infiltration is controlled by slope angle. Based on these results, boundary condition of rainfall is altered and various numerical analysis are performed. The variation of shear strength, the degree of saturation and pore-water pressure for railway slope during rainfall can be predicted and the safety factor of railway slope can be expressed as the function of rainfall amount, namely rainfall index. And suggested rainfall index is compared with the rail transport operation control which is used in KORAIL. It is judged that this rainfall index can be a good tool for the rail-transport operation control.

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The Development of Rail-Transport Operation Control using the Variation of Slope Stability under Rainfall (강우시 사면안전율 변화를 이용한 열차운전규제기준 개발)

  • Kim, Hyun-Ki;Lee, Jin-Wook;Shin, Min-Ho
    • Proceedings of the KSR Conference
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    • pp.397-402
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    • 2003
  • Infiltration of rainfall causes railway embankment to be unstable and may result in failure. Basic relationship between the rainfall and stability of railway embankment are defined to analyze the stability of embankment by rainfall. An experimental study for defining of infiltration rate of rainfall into slope is conducted in the lab. The results of Rainfall infiltration show that rainfall infiltration is not equal to infiltration as like reservoir because rate of rainfall infiltration is controlled by slope angle. Based on these results, boundary condition of rainfall is altered and various numerical analysis are performed. The variation of shear strength, the degree of saturation and pore-water pressure for railway slope during rainfall can be predicted and the safety factor of railway slope can be expressed as the function of rainfall amount, namely rainfall index. Therefore, it is judged that this rainfall index can be a good tool for the rail-transport operation control.

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Development of Rail-transport Operation Control in Consideration of the Stability Variation of Railway Embankment under Rainfall (강우시 사면안전성 변화를 고려한 열차운전규제 개발)

  • 신민호;김현기;김정기
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.13-22
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    • 2003
  • Train speed and infiltration of rainfall causes railway embankment to be unstable and may result in failure. Therefore, the variation in the safety factor of railway embankment should be analyzed as the function of rainfall intensity, rainfall duration, and train speed and the study is accomplished using numerical analysis program. Based on unsaturated soil engineering, the variables in the shear strength function and permeability function are also defined and used for the numerical model for evaluation of railway embankments under rainfall. As a result of the study, in order to secure the safety of train under rainfall, the variation in the safety factor of railway embankment is predicted as the function of rainfall intensity, duration time and the train load as a function of train speed. It is possible to ensure the safety of train under rainfall. Thereafter, the feasibility of the rail-transport operation control with engineering basis was established.

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An analysis on the headway of urban rail transit (도시철도 시스템에서의 운행 시격 분석)

  • Bang, Yung;Kim, Hyung-Hoon;Um, Jung-Kyou;Cho, Yong-Gi
    • Proceedings of the KSR Conference
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    • pp.1495-1500
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    • 2006
  • A signal system is critical point of transport capacity and train operation in urban rail transit. Today the moving block system by radio is taking place of the fixed block system by track circuit for efficiency and short headway in underground railway and right rail transit. In this study, assuming specification of a train, track and control system, the minimum headway on the moving block system and the fixed block system is researched for the maximum transport capacity.

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The Development of Rail-Transport Operation Control based on Unsaturated Soil Mechanics Concept (불포화토이론을 이용한 강우시 열차운전규제기준 개발)

  • Kim, Hyun-Ki;Shin, Min-Ho;Kim, Soo-Sam
    • Journal of the Korean Society of Hazard Mitigation
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    • v.4 no.1
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    • pp.25-31
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    • 2004
  • Infiltration of rainfall causes railway embankment to be unstable and may result in failure. Basic relationship between the rainfall and stability of railway embankment is defined to analyze the stability of embankment by rainfall. An experimental study for defining of infiltration rate of rainfall into slope is conducted in the lab. The results of Rainfall Infiltration show that rainfall Infiltration is not equal to infiltration as like reservoir because rate of rainfall infiltration is controlled by slope angle. Based on these results, boundary condition of rainfall is altered and various numerical analysis are performed. The variation of shear strength, the degree of saturation and pore-water pressure for railway slope during rainfall can be predicted and the safety factor of railway slope can be expressed as the function of rainfall amount, namely rainfall index. Therefore, it is judged that this rainfall index can be a good tool for the rail-transport operation control.

The Trend of the Standardization of the Urban Guided Transport Management System in Europe (유럽 도시철도 신호시스템의 표준화 동향)

  • Lee Young-Hoon;Kim Jong-Ki
    • Proceedings of the KSR Conference
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    • pp.1266-1273
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    • 2004
  • Urban railway signaling system is for train operation with safety in the urban crowded area, that has been increasing the demand of use of advanced train control systems with safe. European Commission is supporting the UGTMS(Urban Guided Transport Management System) project for the research and development. The main objective of UGTMS is to provide the European urban guided transport sector (comprising metro, tram and light rail systems) with a common Management System. A key topic is the extent to which the specifications for the successful ERTMS(European Rail Transport Management System) can be adapted to UGTMS needs. Beyond this, it is necessary to define the relevant functional and system requirements for all types of urban guided transport management systems in order to improve interoperability and intermodality. Also to be explored are the prospects for open system standards. In this article, we look into the trend of the standardization through the UGTMS project in Europe and consider any benefit to the project of the standardization for the urban railway signaling system in Korea.

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A Development of Rail-Transport Operation Control for High-Speed Railway under Rainfall (고속철도의 안전운행을 위한 강우시 열차운전규제기준의 제안)

  • Shin, Min-Ho;Hong, Man-Yong;Lee, Seong-Hyeok;Kim, Hyun-Ki;Kim, Jung-Ki
    • Journal of the Korean Society of Hazard Mitigation
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    • v.3 no.2
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    • pp.111-118
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    • 2003
  • Korea High-Speed Railway has various safety systems to secure safe and stable transportation and makes assurance doubly sure to minimize casualty and property damage caused by natural disasters. But, there is no regulation that reflects domestic railway line, climate, topographical and geological characteristic in introducing the foreign regulations yet. Therefore, it is necessary for us to modify a regulation which is suitable to domestic high-speed railway. In this study, it is possible to establish more reasonable boundary rainfall by grasping and improving the troubles with existing boundary rainfall that is scheduled to be utilized for high-speed rail-transport operation control under rainfall. Also, it is possible to insure the safety of train by four steps such as 'normal operation', 'warning issue', 'train speed control' and 'train stop' using the established boundary rainfall. It will go far toward minimizing the occurrence of natural disasters.

The train tracking of Rubber Tired AGT System using CBTC (고무차륜 AGT의 CBTC에 의한 위치검지시험)

  • Jeong Rak-Gyo;Jeong Sang-Gi;Kim Yeon-Soo;Lee Jeong-Sun
    • Proceedings of the KSR Conference
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    • pp.953-957
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    • 2005
  • Light Rail Transit(LRT) Systems with transport capacity between subway and bus(5,000-25,000 persons per hour) are being carried on over 100 lines around the world. In Korea, to solve the urban transportation problem, the introduction of LRT system has been proceeded positively. It is planned to develop the Korean standard LRT system in which safety, efficiency and cost effectiveness are emphasized. So we were able to make proto type of Rubber tired AGT system for LRT. This is capable of driverless operation using CBTC(Communication Based Train Control) of Moving Block System and is currently making an experiment for reliability in test-line. This study is focused on verifving the train tracking with CBTC in driverless and ATO mode through implementing the examination.

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The test result of Rubber Tired AGT System using CBTC (CBTC에 의한 고무차륜 AGT의 운전)

  • Jeong, Rak-Gyo;Jeong, Sang-Gi;Cho, Hong-Sik;Lee, Jeong-Sun
    • Proceedings of the KIEE Conference
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    • pp.264-269
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    • 2005
  • Light Rail Transit(LRT) Systems with transport capacity between subway and bus(5,000-25,000 persons per hour) are being carried on over 100 lines around the world, In Korea, to solve the urban transportation problem, the introduction of LRT system has been proceeded positively. It is planned to develop the Korean standard LRT system in which safety, efficiency and cost effectiveness are emphasized. So we were able to make proto type of Rubber tired AGT system for LRT. This is capable of driverless operation using CBTC(Communication Based Train Control) of Moving Block System and is currently making an experiment for reliability in test-line. This study is focused on verifving the performance of CBTC system for driverless and ATO mode through implementing the examination.

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