DOI QR코드

DOI QR Code

Tilting Train-induced Roadbed Response on the Conventional Line

틸팅열차 주행시 기존선 흙 노반의 응답특성

  • 고태훈 (한국철도기술연구원 고속철도연구본부) ;
  • 곽연석 (한국철도기술연구원 신교통연구본부) ;
  • 황선근 (한국철도기술연구원 신교통연구본부) ;
  • 사공명 (한국철도기술연구원 신교통연구본부)
  • Received : 2011.09.16
  • Accepted : 2011.10.10
  • Published : 2011.10.26

Abstract

It is a fact that the straightening of track alignment is one of the undoubted ways to improve the train speed on conventional lines, while that requires huge investment resources. Therefore, the operation of a tilting train as well as the minimum improvement of track is suggested as an effective and economical alternative way for the speed-up of conventional lines. Since a driving mechanism of tilting train is different from those of existing trains, in order to make sure its operation safety and stability on conventional line, the performance of track and roadbed must be preferentially evaluated on the conventional line. Furthermore, it is necessary to estimate the tilting-train-induced roadbed response in detail since the roadbed settlement can lead to the track deformation and even derailment. In this research, the patterns of wheel load and lateral force were monitored and analyzed through the field tests, and the derailment coefficient and degree of wheel off-loading were calculated in order to evaluate the tilting train running safety depending on the running speeds (120km~180km) on the conventional line. Moreover, roadbed pressure, settlement and acceleration were also observed as tilting-train-induced roadbed responses in order to estimate the roadbed stability depending on the running speeds. Consequently, the measured derailment coefficient and degree of wheel off-loading were satisfied with their own required limits, and all of the roadbed responses were less than those of existing high-speed train (KTX) over an entire running speed range considered in this study. As a result of this study, the tilting train which will be operated in combination with existing trains is expected to give no adverse impact on the conventional line even with its improved running speed.

References

  1. J.W. Lee, S.H. Lee, D.S. Kim, B.S. Kwon (2003) A Study on the Characteristics of Behavior of Railway Roadbed due to Softening, Proceedings of The Korean Society for Railway, pp. 182-187.
  2. S.S. Kwon (2008) Evaluation of the Dynamic Characteristic and Condition for the Railway Track using LFWD(Light Falling Weight Deflectometer), M.S. Thesis, Seoul National University of Technology.
  3. S.S. Jeon, G.Y. Eum, J.M. Kim (2007) Estimation of the Roadbed Settlement and Bearing Capacity According to Radius of Curve and Cant in Railroad, Journal of Korean Society of Hazard mitigation, 7(1), pp. 29-38.
  4. S. Momoya, E. Sekin, F. Tatsuoka (2005) Deformation characteristics of railway Roadbed and Subgrade under Moving Wheel Load, Japanese Geotechnical Society(JGS), Soil and Foundation 45(4), pp. 99-118.
  5. Korea Railroad Research Institute (2005) Development of Track System Innovation Technology for Speed-Up of Conventional Line, Minister of Land, Transport and Maritime Affairs, pp. 51-54.
  6. J.M. Konard, D. Lachance (2000) Mechanical Properties of Unbound Aggregates from DCP and plate Load Test, Proceedings of the fifth International Conference on Unbound Aggregate in Roads, Nottingham, United Kingdom.
  7. 鐵道總合技術硏究所 (1992) 鐵道構造物等設計標準, 同解說 : 土構造物, 丸善株式會社.
  8. J.H. An, S.L. Yang, H.M. Park, S.A. Kwon (2004) Application of The Dynamic Cone Penetrometer for Strength Estimation of Pavement Foundation, Journal of Korean Society of Road Engineers, 6(3), pp. 17-26.
  9. R. Salgado, S. Yoon (2003) Dynamic Cone Penetration Test (DCPT) for Subgrade Assessment, Joint Transportation Research Program. Proj. No. FHWA/IN/JTRP-2002/30, SPR-2362 Published by Purdue University, pp. 14-16.
  10. J.W. Lee, C.Y. Choi, S.H. Lee, C.Y. Lee (2004) Characteristics of Behavior of the Soft Roadbed through Long-Term Instrumentation on the Field Test, Proceedings of the Korean Society for Railway, pp. 191-197.
  11. C.Y. Choi, S.H. Lee, S.K. Hwang (2007) Characteristics of Earth Pressure with Variable Roadbed Thickness by Railroad Loading, Journal of Korean Society of Civil Engineers D, 27(2), pp. 217-224.
  12. I.W. Lee, S.H. Lee, Y.S. Kang (2006) Characteristics of Roadbed Behaviors of Concrete Track for High-Speed Railway, Journal of the Korean Society for Railway, 9(3), pp. 298-304.
  13. K. Muramoto, E. Sekine (1998) A Study on the Compaction Control of Embankments to Receive Train Loads, RTRI REPORT, 12(4), pp. 31-36.
  14. J.H. Kim (2002) A Study on the Characteristic of Settlement with Thickness variation of Railway Roadbed, M.S. Thesis, Seoul National University of Technology.
  15. I.W. Lee, H.K. Kim, S.K. Hwang, Y.K. Cho (2000) The Characteristic of Reinforced Roadbed Settlement on High-Speed Railroad, Journal of Korean Society of Civil Engineers D, 20(6), pp. 681-690.
  16. E. Sekine, K. Muramoto (1995) Bearing Capacity of Actual Existing Roadbed. RTRI REPORT, pp. 31-36.
  17. M. Sunaga, E. Sekine (1991) Study on the Development of Economical Reinforced Roadbed, RTRI REPORT, 5(10), pp. 25-33.

Cited by

  1. A Study on the Effect Analysis of the Tilting Technology According to the Evaluation of Electric Power Consumption Energy of Rolling Stock vol.15, pp.4, 2012, https://doi.org/10.7782/JKSR.2012.15.4.329