Model testing of leakage effect due to multi-cell inflater of rapid protection system in subsea tunnel

Kwang-San Yoo; Ji-Hyun Lee; Yeon-Deok Kim; Sang-Hwan Kim

doi:10.9711/KTAJ.2015.17.3.295

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2015 Vol.17, Issue 3 Preview Page Next Page

Model testing of leakage effect due to multi-cell inflater of rapid protection system in subsea tunnel 해저터널 급속차폐시스템의 Inflater 분할구조에 따른 터널 내 차수효율에 대한 실험적 연구

31 May 2015. pp. 295-303

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Abstract

This paper presents the study of leakage effect due to multi-cell inflater of rapid protection system to protect the possibilities of tunnel damages by flooding threats and unusual leakage to be occurred during and after subsea tunnel construction. Particularly, this protect system should be necessary in subsea tunnel. This research concentrates the physical model tests due to several multi-cell inflater to study protection capacity of leakage between the inflater and tunnel liner. A 27:1 small scale model are used in the model tests. The leakage rate, water pressure and axial displacement of inflater are measured during the model tests. According to the results, the minium leakage rate clearly shows in the case of two-cell inflater compared with in other cases. It is concluded that the results of this research will be very useful to understand the fundamental information of inflater structure design and development the technology of tunnel protection structures in the future.

Keywords

Subsea tunnel

Model testing

Multi-cell inflater

Leakage effect

Tunnel protection system

본 논문은 해저터널 시공 및 운영 시 발생되는 돌발용수 및 이상누수에 의한 사고에 대비하기 위한 해저터널 급속차폐시스템의 Inflater 분할구조에 따른 터널 내 차수효율에 대한 실험적 연구이다. 해저터널 특성상 해수 유입 또는 지하수 유입, 호우로 인한 침수 등 물과 관련된 피해에 대한 방호시스템은 필수적이다. 이 연구에서는 이러한 급속차폐를 위해 고안된 Inflater 구조에 대하여 형태 및 분할에 따른 차폐능력, 누수량, 수압 그리고 축방향 변위 등을 연구하기 위하여 27:1 축소율을 적용한 실내모형을 다양한 Inflater 분할구조별로 실시하였다. 연구결과에 의하면 2분할 Inflater 구조인 경우가 다른 분할에 비해 시간당 누수량 및 축방향 변위가 낮아 차폐능력이 좋은 것으로 나타났다. 이러한 결과는 해저터널의 제원에 따라 다소 차이는 있을 것으로 예측되나 기본적으로 차폐시스템 설계 및 개발기술 발전에 매우 유용하게 활용될 것으로 기대된다.

키워드

해저터널

모형실험

Multi-cell inflater

차수효과

터널차폐시스템

References

1.Peter Kenyon (2012), “35,000 Gallons of prevention- containing a tunnel flood with an inflatable stopper”, Tunnel talk

2.Kim, Y.I., Cho. S.K., Kim, D.H., Lee, D.H., Lee, I.M. (2003), “Protection measures against water hazards in construction of the subaqueous tunnel under the Han river in the Bundang railway”, Korean society of civil engineers of conference, pp. 369-393.

3.Lee, C.R. (2014), “A fundamental study on Inflater structure to protect the tunnel damage due to flooding threats”, Master's Thesis.

4.Shin, H.S. (2009), “Technology aspects of subsea tunnels”, Korean Geo-Environmental Conference, pp. 147-157.

5.X. Martinez, J. Davalos, E. Barbero, E. Sosa, W. Huebsch, K. Means, L. Banta, G. Thompson (2012), “Inflatable plug for threat mitigation in transportation tunnels”, Society for the Advancement of Material and Process Engineering 2012 Conference, Baltimore, MD.

Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 17
No :3
Pages :295-303
Received Date : 2015-04-15
Revised Date : 2015-05-01
Accepted Date : 2015-05-06
DOI :https://doi.org/10.9711/KTAJ.2015.17.3.295

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

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