DOI QR코드

DOI QR Code

The effect of radial cracks on tunnel stability

  • Zhou, Lei (MOE Key Laboratory of Deep Underground Science and Engineering, College of Architecture and Environment, Sichuan University) ;
  • Zhu, Zheming (MOE Key Laboratory of Deep Underground Science and Engineering, College of Architecture and Environment, Sichuan University) ;
  • Liu, Bang (MOE Key Laboratory of Deep Underground Science and Engineering, College of Architecture and Environment, Sichuan University) ;
  • Fan, Yong (MOE Key Laboratory of Deep Underground Science and Engineering, College of Architecture and Environment, Sichuan University)
  • 투고 : 2017.05.05
  • 심사 : 2017.11.29
  • 발행 : 2018.06.10

초록

The surrounding rock mass contains cracks and joints which are distributed randomly around tunnels, and in the process of tunnel blasting excavation, radial cracks could also be induced in the surrounding rock mass. In order to clearly understand the impact of radial cracks on tunnel stability, tunnel model tests and finite element numerical analysis were implemented in this paper. Two kinds of materials: cement mortar and sandstone, were used to make tunnel models, which were loaded vertically and confined horizontally. The tunnel failure pattern was simulated by using RFPA2D code, and the Tresca stresses and the stress intensity factors were calculated by using ABAQUS code, which were applied to the analysis of tunnel model test results. The numerical results generally agree with the model test results, and the mode II stress intensity factors calculated by ABAQUS code can well explain the model test results. It can be seen that for tunnels with a radial crack emanating from three points on tunnel edge, i.e., the middle point between tunnel spandrel and its top with a dip angle $45^{\circ}$, the tunnel foot with a dip angle $127^{\circ}$, and the tunnel spandrel with $135^{\circ}$ with tunnel wall, the tunnel model strength is about a half of the regular tunnel model strength, and the corresponding tunnel stability decreases largely.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, Sichuan Administration of Work Safety

참고문헌

  1. Baziar, M.H., Nabizadeh, A., Mehrabi, R., Lee, C.J. and Wen, Y.H. (2016), "Evaluation of underground tunnel response to reverse fault rupture using numerical approach", Soil. Dyn. Earthq. Eng., 83(130), 1-17. https://doi.org/10.1016/j.soildyn.2015.11.005
  2. Chen, S.Z. (2014), The Application of Fracture Mechanics in Highway Tunnel Lining Cracking, in Applied Mechanics and Materials, Trans Tech Publications, 1377-1381.
  3. Dhawan, K., Singh, D. and Gupta, I. (2002), "2D and 3D finite element analysis of underground openings in an inhomogeneous rock mass", J. Rock Mech. Min. Sci., 39(2), 217-227. https://doi.org/10.1016/S1365-1609(02)00020-5
  4. Erdi, A., Zheng, Y.R., Feng, X.T. and Xiang, Y.Z. (2015), "Analysis of circular tunnel stability based on the limit strain method", Appl. Math. Mech., 36(12), 1265-1273.
  5. Gattinoni, P., Pizzarotti, E.M. and Scesi, L. (2016), "Geomechanical characterisation of fault rocks in tunnelling: The Brenner Base Tunnel (Northern Italy)", Tunn. Undergr. Sp. Technol., 51, 250-257. https://doi.org/10.1016/j.tust.2015.10.043
  6. Ghorbani, K., Zahedi, M. and Asaadi, A. (2015), "Effects of statistical distribution of joint trace length on the stability of tunnel excavated in jointed rock mass", J. Min. Geoeng., 49(2), 289-296.
  7. Gong, Q., Zhao, J. and Jiao, Y. (2005), "Numerical modeling of the effects of joint orientation on rock fragmentation by TBM cutters", Tunn. Undergr. Sp. Technol., 20(2), 183-191. https://doi.org/10.1016/j.tust.2004.08.006
  8. Huang, F., Zhu, H., Xu, Q., Cai, Y. and Zhuang, X. (2013), "The effect of weak interlayer on the failure pattern of rock mass around tunnel-scaled model tests and numerical analysis", Tunn. Undergr. Sp. Technol., 35, 207-218. https://doi.org/10.1016/j.tust.2012.06.014
  9. Huang, R. and Xiao, H. (2010), "Deformation mechanism of a shallow double-arch tunnel in a sloping rock mass", Bull. Eng. Geol. Environ., 69(1), 89-97. https://doi.org/10.1007/s10064-009-0240-z
  10. Lee, I.M. and Kim, D.H. (2003), "A simulation using a hybrid method for predicting fault zones ahead of a tunnel face", J. Numer. Anal. Met., 27(2), 147-158. https://doi.org/10.1002/nag.266
  11. Li, Y., Zhang, D., Fang, Q., Yu, Q. and Xia, L. (2014), "A physical and numerical investigation of the failure mechanism of weak rocks surrounding tunnels", Comput. Geotech., 61(3), 292-307. https://doi.org/10.1016/j.compgeo.2014.05.017
  12. Liu, J., Li, Y., Xu, S., Xu, S. and Jin, C. (2015), "Cracking mechanisms in granite rocks subjected to uniaxial compression by moment tensor analysis of acoustic emission", Theor. Appl. Fract. Mech., 75, 151-159. https://doi.org/10.1016/j.tafmec.2014.12.006
  13. Mambou, L.L.N., Ndop, J. and Ndjaka, J.M.B. (2015), "Numerical investigations of stresses and strains redistribution around the tunnel: Influence of transverse isotropic behavior of granitic rock, in situ stress and shape of tunnel", J. Min. Sci., 51(3), 497-505. https://doi.org/10.1134/S1062739115030102
  14. Nikadat, N. (2016), "Analysis of stress distribution around tunnels by hybridized FSM and DDM considering the influences of joints parameters", Geomech. Eng., 11(2), 269-288. https://doi.org/10.12989/gae.2016.11.2.269
  15. Park, S.W., Park, S.S., Hwang, I.B. and Cha, C.J. (2012), "A case study on cause analysis for longitudinal crack of duct slab in tunnel", J. Kor. Inst. Struct. Maint. Inspect., 16(5), 19-28. https://doi.org/10.11112/jksmi.2012.16.5.019
  16. Satici, O. and Unver, B. (2014), "Assessment of tunnel portal stability at jointed rock mass: A comparative case study", Comput. Geotech., 64, 72-82.
  17. Sun, X., Qiang, Y., Zhao, M.J. and Wang, K. (2013), Research on Fractal Crack Propagation Mechanism of Hydraulic Tunnel Concrete Lining, in Applied Mechanics and Materials, TransTech Publications, 1704-1708.
  18. Wang, H., Li, Y., Li, S., Zhang, Q. and Liu, J. (2016a), "An elasto-plastic damage constitutive model for jointed rock mass with an application", Geomech. Eng., 11(1), 77-94. https://doi.org/10.12989/gae.2016.11.1.077
  19. Wang, M., Zhu, Z.M. and Liu, J.H. (2012), The Photoelastic Analysis of Stress Intensity Factor for Cracks around a Tunnel, in Applied Mechanics and Materials, TransTech Publications, 197-200.
  20. Wang, Q.Y., Zhu, W.C., Xu, T., Niu, L.L. and Wei, J. (2016b), "Numerical simulation of rock creep behavior with a damage-based constitutive law", J. Geomech., 17(1), 04016044.
  21. Wang, S.Y., Sloan, S.W., Sheng, D.C., Yang, S.Q. and Tang, C.A. (2014), "Numerical study of failure behaviour of pre-cracked rock specimens under conventional triaxial compression", J. Solid. Struct., 51(5), 1132-1148. https://doi.org/10.1016/j.ijsolstr.2013.12.012
  22. Yang, X.L. and Yan, R.M. (2015), "Collapse mechanism for deep tunnel subjected to seepage force in layered soils", Geomech. Eng., 8(5), 741-756. https://doi.org/10.12989/gae.2015.8.5.741
  23. Yoo, C. (2016), "Effect of spatial characteristics of a weak zone on tunnel deformation behavior", Geomech. Eng., 11(1), 41-58. https://doi.org/10.12989/gae.2016.11.1.041
  24. Yu, Q., Yang, S., Ranjith, P.G., Zhu, W. and Yang, T. (2016), "Numerical modeling of jointed rock under compressive loading using x-ray computerized tomography", Rock Mech. Rock Eng., 49(3), 877-891. https://doi.org/10.1007/s00603-015-0800-4
  25. Zhang, Z., Chen, F., Li, N., Swoboda, G. and Liu, N. (2017), "Influence of fault on the surrounding rock stability of a tunnel: Location and thickness", Tunn. Undergr. Sp. Technol., 61(1), 1-11. https://doi.org/10.1016/j.tust.2016.09.003
  26. Zhu, Z. (2009a), "An alternative form of propagation criterion for two collinear cracks under compression", Math. Mech. Solid., 14(8), 727-746. https://doi.org/10.1177/1081286508090043
  27. Zhu, Z. (2009b), "Numerical prediction of crater blasting and bench blasting", J. Rock Mech. Min. Sci., 46(6), 1088-1096. https://doi.org/10.1016/j.ijrmms.2009.05.009
  28. Zhu, Z. (2013), "Evaluation of the range of horizontal stresses in the earth's upper crust by using a collinear crack model", J. Appl. Geophys., 88, 114-121. https://doi.org/10.1016/j.jappgeo.2012.10.007
  29. Zhu, Z., Li, Y., Xie, J. and Liu, B. (2015), "The effect of principal stress orientation on tunnel stability", Tunn. Undergr. Sp. Technol., 49, 279-286. https://doi.org/10.1016/j.tust.2015.05.009

피인용 문헌

  1. Optimal design of shape of a working in cracked rock mass vol.24, pp.3, 2021, https://doi.org/10.12989/gae.2021.24.3.227