DOI QR코드

DOI QR Code

Air-tightness Evaluation of Tube Structures for Super-speed Tube Railway Systems: II. System Test and Parametric Analysis

초고속 열차 시스템을 위한 튜브 구조물의 기밀성 평가 : II. 시스템 실험 및 파라메터 해석

  • 박주남 (한국철도기술연구원 철도구조연구실) ;
  • 김이현 (한국철도기술연구원 철도구조연구실) ;
  • 남성원 (한국철도기술연구원 철도환경연구실)
  • Received : 2010.12.17
  • Accepted : 2011.03.20
  • Published : 2011.04.26

Abstract

This study performed an experimental study for air-tightness performance evaluation of concrete tube structures with joints. The test specimens consist of a continuous concrete tube, a concrete tube with a joint in the middle, and a segmented concrete tube. The test is performed in such a way that the inner pressure of the tube is dropped down to 0.1atm and the increase of the pressure is monitored with time. An equivalent air permeability is then calculated based on the test results. The results show that, as expected, a structure with more joints or bonds tends to be less air-tight. A sensitivity study shows that the system air-tightness performance level becomes higher as either the diameter or the thickness of the tube increases. Moreover, the increase in the diameter or the thickness of the tube makes an effort to enhance the air-tightness more effective.

Acknowledgement

Supported by : 한국철도기술연구원

References

  1. J. Park, S-W. Nam, L-H. Kim, I, Yeo (2011) Air-tightness Evaluation of Tube Structures for Super-speed Tube Railway Systems: I. Analytical Modeling and Material Test, Journal of the Korean Society for Railway, 14(2), pp. 143-150. https://doi.org/10.7782/JKSR.2011.14.2.143
  2. Mehta, P. and Monteiro, P. (2005) Concrete: Microstructure, Properties, and Materials, McGraw-Hill.
  3. K-M, Chang (1998) Numerical Experiments on the Evaluation of Effective Permeability and Tunnel Excavation in the Three Dimensional Fracture Network Model, Tunnel & Underground, 8(4), pp. 275-286.
  4. A. Ziari, M.R. Kianoush, (2009) Investigation of flexural cracking and leakage in RC liquid containing structures, Engineering Structures, 31(5), pp. 1056-1067. https://doi.org/10.1016/j.engstruct.2008.12.019
  5. Y. Billard, G. Debicki, L. Coudert (2005) Leakage rate through a non-cracked concrete wall, comparison between two situations: Air pressure test and accident conditions, Nuclear engineering and design, 235(17-19), pp. 2109-2123. https://doi.org/10.1016/j.nucengdes.2005.05.028
  6. X.F. Song, J.F. Wei, T.SH. He (2009) A method to repair concrete leakage through cracks by synthesizing super-absorbent resin in situ, Construction & Building Materials, 23(1), pp. 386-391 https://doi.org/10.1016/j.conbuildmat.2007.11.009
  7. K. Okamoto, S. Hayakawa, R. Kamimura (1995) Experimental study of air leakage from cracks in reinforced concrete walls, Nuclear engineering and design, 156(1/2), pp. 159-165. https://doi.org/10.1016/0029-5493(94)00941-Q

Cited by

  1. Probabilistic Study on Pressure Behavior in Concrete Vacuum Tube Structures vol.17, pp.3, 2014, https://doi.org/10.7782/JKSR.2014.17.3.186
  2. Air-tightness Evaluation of Tube Structures for Super-speed Tube Railway Systems: I. Analytical Modeling and Material Test vol.14, pp.2, 2011, https://doi.org/10.7782/JKSR.2011.14.2.143
  3. Comparative Study on Rail Freight Policies of Various Countries vol.19, pp.5, 2016, https://doi.org/10.7782/JKSR.2016.19.5.685
  4. Probabilistic performance assessment of airtightness in concrete tube structures vol.20, pp.4, 2016, https://doi.org/10.1007/s12205-015-0735-z