Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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Friction behaviour of inflatable structure system to protect rapidly flooding damages in subsea tunnel

해저터널 급속차폐를 위한 팽창구조체의 마찰거동에 대한 연구

  • Received : 2016.01.18
  • Accepted : 2016.01.28
  • Published : 2016.01.30
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Abstract

This paper is focused on the determination of friction parameter which is a predominant factor in the design of inflatable structure system. This inflatable structure system is very valuably used to protect passively and rapidly the possibilities of tunnel damages by flooding threats and unusual leakage to be occurred during and after underground infrastructure construction. In particular, this system should be necessary in subsea tunnel. This study presents the experimental results obtained from the relative friction characteristics tests of the fabric materials that constitute the inflatable structure. In order to evaluate the relative friction behaviour of the inflatable structure system, friction tests and scaled model tunnel friction tests are carried out. The friction tests are carried out to determine the friction coefficient for different surface conditions between tunnel and inflatable structure. These friction coefficients are then evaluated and compared with the result obtained from the model tunnel friction tests. Interaction behaviours between tunnel and system are also reviewed and described in this study. The results clearly show that the friction coefficients derived from scaled model slippage tests are about 12% lower than values obtained from the friction tests. In addition, this study will be necessary to verify the real friction behaviour with prototype tests before applying in practice.

본 연구는 팽창구조체 설계에서 중요한 인자인 마찰계수의 결정에 대하여 중점을 두었다. 팽창구조체는 지중 구조물 의 시공 및 운영 시 발생되는 돌발용수 및 이상누수에 의한 사고들에 대비한 많은 가치가 있는 수동적 급속차폐시스템이다. 특히 해저터널에 있어서는 필수적이라고 할 수 있다. 본 연구는 팽창구조체를 구성하는 섬유재료의 상대적인 마찰거동에 대한 결과를 제시하였다. 이러한 마찰거동을 평가하기 위하여 마찰실험과 모형터널마찰실험을 실시하였다. 마찰시험으로부터 서로 다른 표면 조건에서 마찰계수를 결정하였으며, 이 결과로 얻어진 마찰계수는 실질적인 모형 미끄럼시험 결과를 통하여 분석 비교하였다. 이 들 결과로부터 터널과 팽창구조체 상호 마찰거동에 대하여 검토하였다. 이 연구 결과로부터 모형터널마찰실험으로부터 얻어진 마찰계수 값은 실내마찰시험으로부터 얻은 마찰계수 값보다 약 12%작게 나타났다.

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References

  1. Barbero, E.J., Sosa, E.M., Martinez, X., Gutierrez, J.M. (2013), "Reliability design methodology for confined high pressure inflatable structures", Engineering Structures. https://doi.org/10.1016/j.engstruct.2013.01.011
  2. Kim, N.Y., "Subsea tunnel research trends for the maximization of the national transportation network hub", Journal of the Korean Geoenvironmental Society, pp. 38-42.
  3. Lee, C.R. (2014), "A fundamental study on inflater structure to protect the tunnel damage due to flooding threats", Master's Thesis.
  4. Martinez, X., Davalos, J., Barbero, E., Sosa, E., Huebsch, W., Means, K., Banta, L., Thompson, G. (2012), "Inflatable plug for threat mitigation in transportation tunnels", Society for the Advancement of Material and Process Engineering 2012 Conference, Baltimore, MD.
  5. Park, S.H., An, S.J., Han, S.J., Yoo, Y.H. (2015), "Simulation study of smoke spread prevention using air curtain system in rescue station platform of undersea tunnel", Journal of Korean Tunnelling and Underground Space Association, pp. 257-266.
  6. Park, U.S., Shin, H.S., Hong, E.S. (2007), "Trends of Investigation and Design for Subsea Tunnels", Journal of Korean Society of civil engineers, pp. 29-41.
  7. Shin, H.S. (2009), "Technology aspects of subsea tunnels", Korean Geo-Environmental Conference, pp. 147-157.
  8. Shin, H.S., Park, U.S. (2006), "Design trend analysis over the case of a foreign subsea tunnel", Korean Society for Rock Mechnics Conference, pp. 184-193.
  9. Sill, J.J., Means, K.H., Sosa, E.M., Barbero, E.J. (2013), "Friction and leakage characteristics of confrined, reduced-scale inflatable structures", VI International Conference on Textile Composites and Inflatable Structures.
  10. Sosa, E.M., Thompson, G.J., Barbero E.J. (2014), "Testing of full-scale inflatable plug for flood mitigation in tunnels", VI International Conference on Textile Composites and Inflatable Structures.
  11. Sosa, E.M., Thompson, G.J., Barbero, E.J., Ghosh, S., Peil, K.L. (2014), "Friction characteristics of confined inflatable structures", Friction-a springerpen journal Vol. 2, No. 4, pp. 365-390. https://doi.org/10.1007/s40544-014-0069-8
  12. Yoo, K.S., Lee, J.H., Kim, Y.D., Kim, S.H., "Model testing of leakage effect due to multi-cell inflater of rapid protection system in subsea tunnel", Journal of Korean Tunnelling and Underground Space Association, pp. 295-303. https://doi.org/10.9711/KTAJ.2015.17.3.295