International Journal of Railway

The Korean Society for Railway (한국철도학회)
권호 표지
DOI QR코드

DOI QR Code

Technical-Economical Evaluation of Chain Vertical Alignment in Underground Urban Subways: The Case of Qom Subway, Line A

  • Published : 2014.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

Urban subways are one of the main parts of urban transportation networks in every city that always requires much attention in order to improve its efficiency in aspects of safety, reliability speed and costs. As the viewpoint of costs, an accurate design, especially design of vertical alignment, can have a dominant role to reduce the costs of urban railway projects. This paper seeks to evaluate the advantages and disadvantages of designing chain vertical alignment for urban subways in compare to flat vertical alignment. To achieve this goal, line A of Qom subway in Iran was selected as a case study in this research. Five parameters considered in the technical-economical evaluation: (1) energy consumption, (2) rolling stock, (3) operation, (4) civil works and geotechnical and (5) hydrological, drainage and pumping. According to the results, a power saving of about 40% have been estimated in the chain vertical alignment for the train without regenerative braking in compare with the flat vertical alignment, although the power saving was calculated less than 10% for the train with regenerative braking. Finally it was found that due to the modern rolling stock technology, the chain vertical alignment represents fewer advantages in compare to the past years.

Keywords

References

  1. Adinolfi, A., Lamedica, R., Modesto, C. and Prudenzi, A. (1998). "Experimental Assessment of Energy Saving Due to Trains Regenerative Braking in an Electrified Subway Line", IEEE Transactions on Power Delivery., Vol. 13, No. 4, pp. 1536-1542. https://doi.org/10.1109/61.714859
  2. Allegre, A.L., Bouscayrol, A., Verhille, J.N., Delarue,, P., Chattot, E., and El-Fassi, S. (2010). "Reduced Scale Power Hardware in the Loop Simulation of an Innovative Subway", IEEE Transactions on Industrial Electronices., Vol. 57, No. 4, pp. 1175-1185. https://doi.org/10.1109/TIE.2009.2029519
  3. Bababeik, M. and Monajjem, M.S. (2012). "Optimizing Longitudinal Alignment in Railway with Regard to Construction and Operating Costs", J. Transp. Eng., Vol. 138, No. 11, pp. 1388-1395. https://doi.org/10.1061/(ASCE)TE.1943-5436.0000448
  4. Bocharnikov, Y.V., Tobias, A.M., Roberts, C., Hillmansen, S., and Goodman, C.J. (2007). "Optimal Driving Strategy for Traction Energy Saving on DC Suburban Railways", IET Electr. Power Appl., Vol. 1, No. 5, pp. 675-682. https://doi.org/10.1049/iet-epa:20070005
  5. Feng, X. (2011). "Optimization of Target Speeds of High-speed Railway Trains for Traction Energy Saving and Transport Efficiency Improvement", J. Energy Policy., Vol. 39, pp. 7658-7665. https://doi.org/10.1016/j.enpol.2011.08.051
  6. Ghanbarpour, A. (Supervisor: Abdi Kordani, A). (2013). "Economical and Technical Evaluation of Internal Diameter of Circular Subway Tunnels", Master of science thesis. Science and Research Branch of Islamic Azad University, Tehran, Iran.
  7. Haidong, L., Baohua, M., Yong, D., Wenzheng, J., and Shukun, L. (2007). "Train Energy-saving Scheme with Evaluation in Urban Mass Transit Systems", J. Transpn Sys Eng & IT., Vol. 7, No. 5, pp. 68-73.
  8. Miyatake, M. and Ko, H. (2010). "Optimization of Train Speed Profile for Minimum Energy Consumption", IEEJ Trans., 2010; (5): 263-269. Published by John Wiley & Sons, Inc.
  9. Ogasa, M. (2008). "Energy Saving and Environmental Measures in Railway Technologies: Example with Hybrid Electric Railway Vehicles", IEEE Trans., 2008; (3), 15-30. Published by John Wiley & Sons, Inc.
  10. Puri, V. (2012). "Macro Energy Risks Affecting the Railway in Great Britain". Rail Safety and Standards Board (RSSB).
  11. Ruelland, F. and Al-Haddad, K. (2006). "Simulation and Optimization of Subway Tunnel Profiles". IEEE ISIE 2006, July 9-12, Montreal, Quebec, Canada.
  12. Xiong, Y., Duan, Y., Zhou, Y., Zhang, B., and Sun, J. (2012). "The Electric Power Saving Schemes of High Speed Electrified Railway", J. Energy Procedia., Vol. 16, pp. 1940-1947. https://doi.org/10.1016/j.egypro.2012.01.297
  13. Yinping, F., Ziyou, G., and Keping, L. (2009). "Optimization Method of Energy Saving Train Operation for Railway Network", J. Transpn Sys Eng & IT., Vol. 9, No. 4, pp. 90-96.

Cited by

  1. Feasibility Analysis on Ground-level Stations and Wireless Power Transfer Technology Applications for Monorail System vol.7, pp.3, 2014, https://doi.org/10.7782/IJR.2014.7.3.071