DOI QR코드

DOI QR Code

Analysis on the tunnel behavior characteristic in the excessive fractured zone distribution of rock area

파쇄대가 과대분포한 암반지역에서 터널의 거동특성에 관한 연구

  • Park, Jae-Weon (Dae Han Consultants Co., LTD. Dept of Geotechnical & Tunnel) ;
  • Lee, Seung-Ho (Sang Ji University, Dept. of Civil Engineering)
  • 박재원 ((주) 대한콘설탄트 지반공학부) ;
  • 이승호 (상지대학교 건설시스템공학과)
  • Received : 2016.07.01
  • Accepted : 2016.07.15
  • Published : 2016.07.29

Abstract

This article is to apply the tunnel support system selected after comparatively analyzing of RMR and tunnel instrumentation between the tunnel behavior characteristic predicted through geotechnical investigations and the numerical analysis at the design stage and the properties deformation occurred at the construction stage. This attempt results from the behavior characteristic of the tunnel excavation ground shown differently in accordance with the ground quality and reinforcement method. This, therefore, provide the data and results analysed the actual decision RMR-crown settlement & convergence and reduction of material property of ground as parameters. Also, it's shown that the tunnel designer is able to predict tunnel behavior characteristic when designing in bedrock areas excessively distributed faults and fractured zones.

본 논문은 설계단계에서 지반조사와 수치해석을 통해 예측된 터널의 거동특성과 실제 시공단계에서 어떠한 변형특성을 보이고 있는지 RMR 및 계측데이터의 비교분석을 통해 선정된 터널지보시스템의 선택적 적용을 보여준다. 이는 파쇄대가 과대분포한 암반지역에 터널을 설치할 경우, 터널굴착지반의 거동은 지반의 특성과 보강공법 등의 영향에 따라 상이한 거동특성 때문이다. 그러므로, 본 연구에서는 지반설계자가 단층대 및 파쇄대가 과대 분포한 암반지역의 터널 설계시, RMR-계측 데이터 분석과 지반물성치 저감에 따른 매개변수 분석을 비교하여, 지반 설계자가 향후 유사한 파쇄대가 과대분포한 지역의 터널거동특성을 예측할 수 있도록 하고자 한다.

Keywords

References

  1. Bieniawski, Z.T. (1989), "Engineering rock mass classification", Wiley-Interscience, New York.
  2. Cho, Y.G., Shin, S.M., Chung, E.M., Choi, J. H., Yoo, C. (2015), "Effect of orientation of fracture zone on tunnel behavior during construction using model test", Journal of Korean Tunnelling and Underground Space Association, Vol. 17, No. 3, pp. 189-204. https://doi.org/10.9711/KTAJ.2015.17.3.189
  3. Hoek, E., Marinos, P. (2000), "Predicting tunnel squeezing problems in weak heterogeneous rock masses", Tunnels and Tunnelling International, Part 1 - November 2000, Part 2 - December 2000, pp. 20
  4. Hoek, E., Guevara, R. (2009), "Overcoming squezzing in the Yacambu-Quibor tunnel, Venezuela", Rock Mechanics and Rock Engineering, Vol. 42, No. 2, pp. 389-418. https://doi.org/10.1007/s00603-009-0175-5
  5. Kim, I.S., Son, M., Jung, H.J., Lee, J.D., Kim, J.J., Beak, I.S. (1997), "Geological Characteristics of Kyongju-Ulsan Area : Palaeomagnetism and Magnetic Susceptibility of the Granitic Rocks in the Ulsan Fault Area", Economic and environmental geology, Vol. 31, No. 1, pp. 31-43.
  6. Kim, C.Y., Hong, S.W., Kim, K.Y., Baek, S.H. (2004), "Numerical analysis of the convergence behavior of the tunnel", Tunnel & Underground Space, Vol. 6, No. 3, pp. 183-197.
  7. Kim, C.Y., Kim, K.Y., Baek, S.H., Moon, H.K., Lee, S.D. (2006), "Numerical analysis on the effect of fractured zone on the displacement - behavior of tunnel", Tunnel & Underground Space, Vol. 16, No. 3, pp. 218-231.
  8. Kim, G.J., Moon, H.K., (2001), "A Theoretical and Numerical Study on the Effects of Prereinforcement of Tunnel Face", Tunnel and underground space, Vol. 11, No. 4, pp. 328-338.
  9. Kim, I.S., Son, M., Jung, H.J., Lee, J.D., Kim, J.J., Beak, I.S. (1997), "Geological Characteristics of Kyongju-Ulsan Area : Palaeomagnetism and Magnetic Susceptibility of the Granitic Rocks in the Ulsan Fault Area", Economic and environmental geology, Vol. 31, No. 1, pp. 31-43.
  10. Moon, T.H., Son, M., Jang, T.W., Kim, I.S. (2000), "Paleostress reconstruction in the tertiary basin areas in Southeasten Korea", Journal of the Korean Earth Science Society, Vol. 21, No. 3, pp. 230-249.
  11. Park, S.H., Shin, Y.S., Bae, G.J. (2008), "A study on the engineering meanings of the critical strain concept in tunnelling", Tunnel and underground space, Vol. 10, No. 2, pp. 129-137.
  12. Sakurai (1993), "The assessment of tunnel stability on the basis of field measurement", XVIII AGI Congress.
  13. Son, M., Song, C.W., Kim, M.C., Cheon, Y.B., Jung, S.H., Cho, H.S., Kim, H.G., Kim, J.S., Sohn, Y.K. (2013), "Miocene Crustal Deformation, Basin Development, and Tectonic Implication in the Southeastern Korean Peninsula", Journal of the Geological Society of Korea, Vol. 49, No. 1, pp. 93-118.
  14. Yoo, C., Cho, Y.G., Park, J.G. (2013), "Effect of orientation of facture zone on tunnel behavior - numerical investigation", Journal of Korean Tunnelling and Underground Space Association, Vol. 15, No. 3, pp. 253-270. https://doi.org/10.9711/KTAJ.2013.15.3.253
  15. Yoo, C., Park, J.G. (2014), "Deformation behavior of tunnels crossing weak zone during excavationnumerical investigation", Journal of Korean Tunnelling and Underground Space Association, Vol. 16, No. 4, pp. 373-385. https://doi.org/10.9711/KTAJ.2014.16.4.373