Investigation on the Behavior of Tunnel Face Reinforced with Longitudinal Reinforcements using Reduced-Scale Model Tests

Chung-sik Yoo; Hyun-Kang Shin

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2000 Vol.2, Issue 2 Preview Page Next Page

Investigation on the Behavior of Tunnel Face Reinforced with Longitudinal Reinforcements using Reduced-Scale Model Tests 모형실험에 의한 수평보강재로 보강된 터널 막장의 거동 분석

30 September 2000. pp. 32-40

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Abstract

This paper presents the results of a parametric study on the behavior of tunnel face reinforced with horizontal pipes. A series of reduced-scale model tests was carried out to in an attempt to verify previously performed three-dimensional numerical modeling and to investigate effects of reinforcement layout on the tunnel face deformation behavior. The results of model tests indicate that the tunnel face deformation can significantly reduced by pre-reinforcing the tunnel face with longitudinal members and thus enhancing the tunnel stability. In addition, the model tests results compare fairly well with those from the previously performed three-dimensional finite element analysis. Therefore, a properly calibrated three dimensional model may effectively be used in the study of tunnel face reinforcing technique.

Keywords

Tunnelling

Face stability

Face reinforcement

Reduced-scale model test

본 논문에서는 수평보강재로 보강된 터널 막장의 거동에 대한 매개변수 연구를 다루었다. 매개변수 연구에서는 축소모형실험을 수행하였으며 실험 결과를 이용하여 보강막장의 거동을 고찰하였다. 실험결과 터널 막장은 수평보강재로 보강함에 따라 변형이 억제되어 안정성이 증대되는 경향을 보였으며, 이러한 결과는 3차원유한요소해석 결과와 정성적인 면에서 좋은 일치를 보였다. 따라서 막장 수평보강 공법은 막장의 안정성을 향상시키는 매우 유용한 공법으로 적용된 수 있을 것으로 판단되며, 일반적인 설계법을 개발하기 위해서 3차원 유한요소해석 모델링이 활용될 수 있을 것으로 사료된다.

키워드

보강막장

축소모형 실험

유한요소해석

References

1. 유충식, 신현강(1999), “수평보강재로 보강된 터널 막장의 거동”, ’99 가을학술발표회 논문집, 1999년 10월 30일, pp. 185~PP. 192.

2. Mastropietro, G.(1979), "Progetto esecutivo della galleria", Proc. of the Seminario sui lavori in galleria, ANAS, Roma; pp. 45∼66

3. Wong, R. C. K., and Kaiser P. K. (1991), "Performance Assessment of Tunnels in Cohesionless Soils", ASCE Journal of Geotechnical Engineering, Vol. 117. No. 12,

December, 1991

4. Chambon, Pierre and Corte, Jean-Francois (1994), "Shallow Tunnels in Cohesionless Soil: Stability of Tunnel Face",ASCE Journal of Geotechnical Engineering, Vol. 120. No. 7, July, 1994

5. Hallak, R. Al Garnier, j. Leca E. (1994), "Experimental Study of the stability of a tunnel face reinforced by bolts", pp1 ∼ pp5

6. Broms, B.B. and Bennermark, H. 1967. Stability of clay at vertical openings, Journal of the Soil Mechanics and Foundaion Division, 93: 71-95

7. Lunardi, P., P., Focaracci, A., Giogi, P. and Papacella, A.(1992), "Tunnel face reinforcement in soft ground design and constrol during excavation", Int. Congr.

Towards New Worlds in Tunnelling, Acapulco, Vol 2, pp. 897∼908.

8. Peila, D, Oreste, P.P, and Pellizza, S.(1996), "Study of the influence of sub-horizontal fiber-glass pipes on the stability of a tunnel face.", Proc. Int. Conf. on Noth American Tunneling 96. Vol. 1, pp. 425∼431.

9. Calvello, M. and Taylor, R.N.(1999), "Centrifuge modelling of a spile-reinforced tunnel heading", Preprint Volume of Proceedings on Geotechanical Aspects of Underground Construction in soft Ground, Tokyo, pp. 313∼318.

10. Yoo, C.S. and Shin, H.K.(1999), "Behavior of tunnel face pre-reinforced with sub-horizontal pipes", Preprint Volume of Proceedings on Geotechanical Aspects of Underground Construction in soft Ground, Tokyo, pp. 434∼441.

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 : 2
No :2
Pages :32-40

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

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