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

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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The development of a back analysis program for subsea tunnel stability under operation: transversal tunnel section

운영 중 해저 터널의 안정성 평가를 위한 역해석 프로그램 개발: 횡단방향

  • 안준상 (인하대학교 토목공학과) ;
  • 김병찬 ((주)베이시스소프트 건설IT연구소) ;
  • 이상현 (인하대학교 토목공학과) ;
  • 송기일 (인하대학교 토목공학과)
  • Received : 2017.03.07
  • Accepted : 2017.03.17
  • Published : 2017.03.31
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Abstract

When back analysis is used for the assessment of an operating subsea tunnel safety in various measurement information such as stress, water pressure and tunnel lining and ground stiffness degradation, the reliable results within tolerable error rate can be obtained. By utilizing a commercial geotechnical analysis program FLAC3D, back analysis can be performed with a DEA which has already been successfully validated in previous studies. However, relative more time-consumption is the drawback of this approach. For this reason, this study introduced beam-spring model-based on FEM solver which uses less analysis time relatively. Beam-spring program capable of structural analysis of a circular tunnel section was developed by using Python language and combined with the built-DEA. From the measurement datum, expected to estimate the stability of an operation tunnel close to real-time.

운영 중 해저 터널의 안정성 평가에 응력, 수압 그리고 라이닝 및 주변지반의 강성 열화 등과 같은 다양한 계측 정보를 사용해서 역해석하면, 효율적인 오차율 이내의 결과를 획득할 수 있다. 선행 연구에서 검증된 차분진화 알고리즘 기반의 역해석 수행 시 FLAC3D 등 범용 지반해석 프로그램을 사용했지만, 상대적으로 해석시간이 오래 걸리고, 제어가 어려운 단점이 있다. 이러한 이유로, 본 연구에서는 상대적으로 해석시간이 짧게 소요되는 beam-spring 모델 기반의 FEM solver를 도입하였다. 원형 터널 단면의 구조해석이 가능한 beam-spring 프로그램을 Python 언어로 개발하여, 기구축된 차분진화 알고리즘과 결합하였다. 계측 데이터로부터 실시간에 가깝게 운영 중 터널의 안정성 평가가 가능할 것으로 판단된다.

Keywords

References

  1. AFTES-WG7. (1993), "Considerations on the Usual Methods of Tunnel Lining Design", French Tunneling and Underground Engineering Association, Working Group No. 7 - Temporary Supports and Permanent Lining.
  2. Ahmet, G.C. (2010), "Evaluation of structural analysis methods used for the design of TBM segmental linings", Master's thesis, Middle East Technical University.
  3. An, J.S., Kim, B.C., Moon, H.K., Song, K.I., Su, G.S. (2016a), "DEA optimization for operating tunnel back analysis", Journal of Korean Tunnelling and Underground Space Association, Vol. 18, No. 2, pp. 183-193. https://doi.org/10.9711/KTAJ.2016.18.2.183
  4. An, J.S., Kim, B.C., Moon, H.K., Song, K.I. (2016b), "Estimation of subsea tunnel stability considering ground and lining stiffness degradation measurements", Journal of Korean Tunnelling and Underground Space Association, Vol. 18, No. 5, pp. 389-399. https://doi.org/10.9711/KTAJ.2016.18.5.389
  5. An, J.S., Kim, B.C., Moon, H.K., Song, K.I. (2016c), "The Development of Back Analysis Program for Tunnel Stability under Operation: Longitudinal Direction", Journal of Korean Tunn Undergr Sp Assoc, Vol. 18, No. 6, pp. 545-556. https://doi.org/10.9711/KTAJ.2016.18.6.545
  6. Arnau, O., Molins, C. (2012), "Three dimensional structural response of segmental tunnel linings", Engineering structures, Vol. 44, pp. 210-221. https://doi.org/10.1016/j.engstruct.2012.06.001
  7. Barpi, F., Barbero, M., Peila, D. (2011), "Numerical modelling of ground-tunnel support interaction using bedded-beam-spring model with fuzzy parameters", Gospodarka Surowcami Mineralnymi, Vol. 27, pp. 71-87.
  8. Bickel, J.O., Kuesel, T.R., & King, E. H. (1996), "Tunnel Engineering Handbook", Chapman and Hall. New York (ITP).
  9. ITA (International Tunnelling Association) Working Group No.2, (2000), "Guidelines for the design of shield tunnel lining", Tunnelling and Underground Space Technology, Vol. 15, No. 3, pp. 303-331. https://doi.org/10.1016/S0886-7798(00)00058-4
  10. JSCE. (1996), "Japanese Standard for Shield Tunnelling, Japan Society of Civil Engineers", The third edition, Tokyo.
  11. Kawabata, K., Sakai, S., Deguchi, T., Sudo, T., Hori, N., Ishikawa, T. (2014), "Repair and Reinforcement Technology for Safe and Secure Concrete Structures that Have a Long Service Life", NTT Technical Review, Vol. 12, No. 10.
  12. Kim, J.W., Hong, E.S., Cho, G.C. (2016), "Assessment of elastic-wave propagation characteristics in grouting-improved rock mass around subsea tunnels", Journal of Korean Tunnelling and Underground Space Association, Vol. 18, No. 2, pp. 235-244. https://doi.org/10.9711/KTAJ.2016.18.2.235
  13. Klar, A., Marshall, A.M., Soga, K., Mair, R.J. (2008), "Tunneling effects on jointed pipelines", Canadian Geotechnical Journal, Vol. 45, No. 1, pp. 131-139. https://doi.org/10.1139/T07-068
  14. Koyama, Y. (2003), "Present status and technology of shield tunneling method in Japan", Tunnelling and Underground Space Technology, Vol. 18, No. 2, pp. 145-159. https://doi.org/10.1016/S0886-7798(03)00040-3
  15. Lee, Y.J., Kim, K.L., Jeong, K.W., Hong, E.J., Kim, S.H., Jun, D.C. (2015), "A study on the design of shield tunnel lining in high water pressure condition", Journal of Korean Tunnelling and Underground Space Association, Vol. 17, No. 3, pp. 227-236. https://doi.org/10.9711/KTAJ.2015.17.3.227
  16. Nikkhah, M., Mousavi, S.S., Zare, S., Khademhosseini, O. (2016), "Evaluation of structural analysis of tunnel segmental lining using beam-spring method and force-method (Case study: Chamshir water conveyance tunnel)", Journal of Mining and Environment. (Published online: 27 May 2016)
  17. US Army Corps of Engineering (USACE) (1997), "Tunnels and shafts in rock", Engineering manual 1110-2-2901, Washington (USA).
  18. Woo, S.J., Yoo, C.S. (2015), "A study on the member forces of segmental linings considering key segments", Journal of Korean Tunnelling and Underground Space Association, Vol. 17, No. 3, pp. 363-382. https://doi.org/10.9711/KTAJ.2015.17.3.363
  19. Wood M. (1975), "The Circular Tunnel in Elastic Ground", Geotechnique, Vol. 25, No. 1. pp. 115-127. https://doi.org/10.1680/geot.1975.25.1.115
  20. Yan, Q.X., Yao, C.F., Yang, W.B., He, C., Geng, P. (2015), "An Improved Numerical Model of Shield Tunnel with Double Lining and Its Applications", Hindawi Publishing Corporation, Advances in Materials Science and Engineering, Vol. 2015.