• Title/Summary/Keyword: 운행선

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Evaluation of Track Irregularity Effect due to Adjacent Excavation on Serviced Railway Line (철도시설물 인접굴착공사에 따른 운행선 궤도의 궤도틀림 영향 평가)

  • Choi, Jung-Youl;Park, Dong-Ryong;Chung, Jee-Seung
    • The Journal of the Convergence on Culture Technology
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    • v.5 no.4
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    • pp.401-406
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    • 2019
  • The three-dimensional precision numerical analysis was performed using the finite element model applied with the railway track model consisting of rails, sleepers, and track elastic springs(ballast, rail pad). As a result of analyzing the track deformation level of the existing tracks due to the excavation work adjacent to the railway facilities, it was found that the track irregularity evaluation criteria (allowed values) of both conventional and high-speed railways lines were satisfied. Based on the numerical analysis using the track model, it was analyzed that the results of the prediction of the track irregularity due to the excavation work and the level of the track deformation occurring at the actual site could be approximated as closely as possible.

Evaluation of Structural Stability of Tunnel due to Adjacent Excavation on Urban Transit (도시철도 인접굴착공사에 따른 터널구조물의 구조 안정성 평가)

  • Choi, Jung-Youl;Lee, Ho-hyun;Kang, You-Song;Chung, Jee-Seung
    • The Journal of the Convergence on Culture Technology
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    • v.6 no.2
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    • pp.503-508
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    • 2020
  • The three-dimensional precision numerical analysis was performed using the finite element model applied with the railway track model consisting of rails, As a result of analyzing the track deformation level of the existing tunnel due to the excavation work adjacent to the urban transit, it was found that the evaluation criteria (allowed values) of conventional railways lines were satisfied. Based on the numerical analysis, it was analyzed that the results of the prediction of the tunnel structural stability of due to the excavation work and the level of the tunnel deformation occurring at the actual site could be approximated as closely as possible.

Evaluation of Track irregularity due to Adjacent Excavation Work on Serviced Urban Transit (도시철도 인접굴착공사에 따른 운행선 궤도의 궤도틀림 분석)

  • Choi, Jung-Youl;Lee, Ho-hyun;Kang, You-Song;Chung, Jee-Seung
    • The Journal of the Convergence on Culture Technology
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    • v.6 no.2
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    • pp.481-487
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    • 2020
  • In this study, finite element analysis was performed to evaluate the track irregularity of the existing track system on urban transit according to the large-scale excavation work that is constructed adjacent to the serviced line. Based on the numerical analysis, the effect of track irregularity generated during the step-by-step construction process was analytically derived, and the stability in terms of track deformation was evaluated through comparison with related standards. As the results, in the case of track irregularity items evaluated based on the relative displacement difference at a certain distance, such as alignment and vertical irregularity, it occurred most clearly at the location where deformation of the existing structure begins, such as the end point of adjacent excavation work. On the other hand, the overall vertical and horizontal displacement of the track was the largest deformation at the center of the construction section. The vulnerable position of the deformed side of the existing structure due to adjacent excavation is analytically proven that the both of the end point section and the center of the construction can be a vulnerable position in terms of track irregularity.

A Study on the Optimized Cross-section of Embedded Rail System (레일 매립형 궤도시스템(ERS, Embedded Rail System)의 최적단면에 관한 연구)

  • Hwang, Man-Ho;Yun, Kyung-Min;Kim, Soon-Cheol;Lim, Nam-Hyoung
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.15 no.4
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    • pp.2511-2518
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    • 2014
  • An ERS(Embedded Rail System) has large effect on the load distribution because of its continuous rail support. Therefore, stress level of the track components is lower than that of other system. Though the ERS has various advantages, the application example in a domestic railway is rarely applied and the studies for the application of high-speed service lines are insufficient. In this paper, the vertical stiffness is derived from laboratory test and the optimized cross-section is also derived from the analytical analysis as a basic study for application of ERS on the high-speed service lines.

Analysis of Requirements for Testing Operation of the Rolling Stock on the Main Line (철도차량 본선 운행선로 시운전에 관한 요건 분석)

  • Choi, Kyung-Jin;Yang, Doh-Chul;Choe, Kang-Youn
    • Proceedings of the KSR Conference
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    • pp.2286-2291
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    • 2011
  • Technology on the rolling stock is very composition and system engineering. We have to consider to many parameters on the rolling stock design. High speed train is interface between rolling stock and infra system of rail, signal, communication etc. For many years testing operation has experienced substantial growth based on various advanced new technology. Recently some problems was clearly stated on effective management, practical use and testing operation of the the rolling stock on the technology change. This paper presents some results of the study on necessary requirements of the operation testing for rolling stock technology change. We propose a general plan to suggest the operation testing and the parameters of the rolling stock on the technology change in the text.

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Estimation of the Rail pad Stiffness Characteristic and the Sustainable period in Service (운행선에서 레일패드의 탄성변화율과 내구년수 예측)

  • Park, Dae-Geun;Kim, Jung-Hun;Choi, Hyun-Su;Kang, Young-Jong
    • Proceedings of the KSR Conference
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    • pp.432-441
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    • 2007
  • Any track system needs major changes of its components during its life. The most economical solution is, if possible, to make all components reach their life limit during the major track rehabilitation operation. Usually, the rail does a role as the driving component for the objective: its life-time is equivalent to around 500 million tons of traffic on high speed lines. On the KTX line with 110 trains per day, this would correspond to around 16 years, which is probably too long for the elastic pads of a concrete slab track. The most economical solution should be to change them at an intermediate step of 8 years, without changing the rail, and then to change both the rail and elastic pad at 16 years intervals (some rail changes on the South East TGV line in France began 15 years after service opening at 260 km/h, but recent rails have better characteristics).

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