Geomechanics and Engineering

  • 제17권3호
  • /
  • Pages.237-245
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  • 2019
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Favorable driving direction of double shield TBM in deep mixed rock strata: Numerical investigations to reduce shield entrapment

  • Wen, Sen (School of Civil Engineering and Architecture, Henan University) ;
  • Zhang, Chunshun (Department of Civil Engineering, Monash University) ;
  • Zhang, Ya (School of Civil Engineering and Architecture, Henan University)
  • 투고 : 2017.07.11
  • 심사 : 2019.01.22
  • 발행 : 2019.02.28
⟨ 이전 논문 다음 논문 ⟩

초록

In deep mixed rock strata, a double shield TBM (DS-TBM) is easy to be entrapped by a large force during tunneling. In order to reduce the probability of the entrapment, we need to investigate a favorable driving direction, either driving with or against dip, which mainly associates with the angle between the tunneling axis and strike, ${\theta}$, as well as the dip angle of rock strata, ${\alpha}$. We, therefore, establish a 3DEC model to show the changes of displacements and contact forces in mixed rock strata through LDP (longitudinal displacement profile) and LFP (longitudinal contact force profile) curves at four characteristic points on the surrounding rock. This is followed by a series of numerical models to investigate the favorable driving direction. The computational results indicate driving with dip is the favorable tunneling direction to reduce the probability of DS-TBM entrapment, irrespective of ${\theta}$ and ${\alpha}$, which is not in full agreement with the guidelines proposed in RMR. From the favorable driving direction (i.e., driving with dip), the smallest contact force is found when ${\theta}$ is equal to $90^{\circ}$. The present study is therefore beneficial for route selection and construction design in TBM tunneling.

키워드

과제정보

연구 과제 주관 기관 : China National Natural Science Foundation

참고문헌

  1. Bilgin, N. (2016), "An appraisal of TBM performances in Turkey in difficult ground conditions and some recommendations", Tunn. Undergr. Sp. Technol., 57, 265-276. https://doi.org/10.1016/j.tust.2016.01.038
  2. Bayati, M. and Hamidi, J.K. (2017), "A case study on TBM tunnelling in fault zones and lessons learned from ground improvement", Tunn. Undergr. Sp. Technol., 63, 162-170. https://doi.org/10.1016/j.tust.2016.12.006
  3. Cheng J.L., Yang, S.Q., Du, L.K., Wen, S. and Zhang, J.Y. (2016), "Three-dimensional numerical simulation on interaction between double-shield TBM and surrounding rock mass in composite ground", Chin. J. Rock Mech. Eng., 35(3), 511-523.
  4. Farrokh, E., Mortazavi, A. and Shamsi, G. (2006), "Evaluation of ground convergence and squeezing potential in the TBM driven Ghomroud Tunnel project", Tunn. Undergr. Sp. Technol., 21(5), 504-510. https://doi.org/10.1016/j.tust.2005.09.003
  5. Farrokh, E. and Rostami, J. (2008), "Correlation of tunnel convergence with TBM operational parameters and chip size in the Ghomroud tunnel, Iran", Tunn. Undergr. Sp. Technol., 23(6), 700-710. https://doi.org/10.1016/j.tust.2008.01.005
  6. Farrokh, E. and Rostami, J. (2009), "Effect of adverse geological condition on TBM operation in Ghomroud tunnel conveyance project", Tunn. Undergr. Sp. Technol., 24(4), 436-446. https://doi.org/10.1016/j.tust.2008.12.006
  7. Goh, A.T.C., Zhang, W.G., Zhang, Y.M., Xiao, Y. and Xiang, Y.Z. (2018), "Determination of EPB tunnel-related maximum surface settlement: A Multivariate adaptive regression splines approach", Bull. Eng. Geol. Environ., 77, 489-500 https://doi.org/10.1007/s10064-016-0937-8
  8. Hoek, E. (2006), Practical rock engineering, .
  9. Hasanpour, R. (2014), "Advance numerical simulation of tunneling by using a double shield TBM", Comput. Geotech., 57, 37-52. https://doi.org/10.1016/j.compgeo.2014.01.002
  10. Hasanpour, R., Rostami, J. and Unver, B. (2014), "3D finite difference model for simulation of double shield TBM tunnelling in squeezing grounds", Tunn. Undergr. Sp. Technol., 40, 109-126. https://doi.org/10.1016/j.tust.2013.09.012
  11. Hasanpour, R., Rostami, J. and Barla, G. (2015), "Impact of advance rate on entrapment risk of a double-shielded TBM in squeezing ground", Rock Mech. Rock Eng., 48(3), 1115-1130. https://doi.org/10.1007/s00603-014-0645-2
  12. Hasanpour, R., Rostami J. and Ozcelik Y. (2016), "Impact of overcut on interaction between shield and ground in the tunneling with a double-shield TBM", Rock Mech. Rock Eng., 49(5), 2015-2022. https://doi.org/10.1007/s00603-015-0823-x
  13. Huang, X., Liu, Q.S., Peng, X.X., Lei, G.F. and Liu, H. (2017), "Mechanism and forecasting model for shield jamming during TBM tunnelling through deep soft ground", Eur. J. Environ. Civ. Eng., 1-34.
  14. Huang, X., Liu, Q.S., Liu, H., Zhang, P.L., Pan, S.L., Zhang, X.P. and Fang, J.N. (2018), "Development and in-situ application of a real-time monitoring system for the interaction between TBM and surrounding rock", Tunn. Undergr. Sp. Technol., 81, 187-208. https://doi.org/10.1016/j.tust.2018.07.018
  15. Liu, Q.S., Huang ,X., Liu, J P. and Pan, Y.C. (2015), "Interaction and safety control between TBM and deep mixed ground", J. China Coal Soc., 40(6), 1213-1224.
  16. Rostami, J. (1997), "Development of a force estimation model for rock fragmentation with disc cutters through theoretical modeling and physical measurement of crushed zone pressure", Ph.D. Thesis, Colorado School of Mines, Golden, Colorado, U.S.A.
  17. Ramoni, M. and Anagnostou, G. (2010), "Tunnel boring machines under squeezing conditions", Tunn. Undergr. Sp. Technol., 25(2), 139-157. https://doi.org/10.1016/j.tust.2009.10.003
  18. Ramoni, M. and Anagnostou, G. (2011), "The interaction between shield, ground and tunnel support in TBM tunneling through squeezing ground", Rock Mech. Rock Eng., 44(1), 37-61. https://doi.org/10.1007/s00603-010-0103-8
  19. Ramoni, M. and Anagnostou, G. (2010), "Thrust force requirements for TBMs in squeezing ground", Tunn. Undergr. Sp. Technol., 25(4), 433-455. https://doi.org/10.1016/j.tust.2010.02.008
  20. Ramoni, M. and Anagnostou, G. (2011a), "The effect of consolidation on TBM shield loading in water-bearing squeezing ground", Rock Mech. Rock Eng., 44(1), 63-83. https://doi.org/10.1007/s00603-010-0107-4
  21. Ramoni, M. and Anagnostou G. (2011b), "The interaction between shield, ground and tunnel support in TBM tunnelling through squeezing ground", Rock Mech. Rock Eng., 44(1), 37-61. https://doi.org/10.1007/s00603-010-0103-8
  22. Shang, Y.J., Shi, Y.Y., Zeng, Q.L., Yin, J.T. and Xue, J.H. (2005), "TBM jamming and deformation in complicated geological condition and engineering measures", Chin. J. Rock Mech. Eng., 24(1), 3858-3863.
  23. Xiang, Y.Z., Liu, H.L., Zhang, W.G., Chu, J., Zhou, D. and Xiao, Y. (2018), "Application of transparent soil model test and DEM simulation in study of tunnel failure mechanism", Tunn. Undergr. Sp. Technol., 74, 178-184 https://doi.org/10.1016/j.tust.2018.01.020
  24. Zhao, J. (2007), "Tunnelling in rock-present technology and future challenges", Proceedings of the World Tunnel Congress, Prague, Czech Republic, May.
  25. Zhao, K., Janutolo, M. and Barla, G. (2012), "A completely 3D model for the simulation of mechanized tunnel excavation", Rock Mech. Rock Eng., 45(4), 475-497. https://doi.org/10.1007/s00603-012-0224-3
  26. Zhang, J.Z. and Zhou, X.P. (2017), "Time-dependent jamming mechanism for Single-Shield TBM tunneling in squeezing rock", Tunn. Undergr. Sp. Technol., 69, 209-222. https://doi.org/10.1016/j.tust.2017.06.020