Geomechanics and Engineering

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

EPB tunneling in cohesionless soils: A study on Tabriz Metro settlements

  • Rezaei, Amir H. (Department of Civil Engineering, Azarbaijan Shahid Madani University) ;
  • Shirzehhagh, Mojtaba (Department of Civil Engineering, Tarbiat Modares University) ;
  • Golpasand, Mohammad R. Baghban (Department of Civil Engineering, Seraj Institute of Higher Education)
  • Received : 2019.07.26
  • Accepted : 2019.09.23
  • Published : 2019.10.10
⟨ Previous Next ⟩

Abstract

A case study of monitoring and analysis of surface settlement induced by tunneling of Tabriz metro line 2 (TML2) is presented in this paper. The TML2 single tunnel has been excavated using earth pressure balanced TBM with a cutting-wheel diameter of 9.49 m since 2015. Presented measurements of surface settlements, were collected during the construction of western part of the project (between west depot and S02 station) where the tunnel was being excavated in sand and silt, below the water table and at an average axis depth of about 16 m. Settlement readings were back-analyzed using Gaussian formula, both in longitudinal and transversal directions, in order to estimate volume loss and settlement trough width factor. In addition to settlements, face support and tail grouting pressures were monitored, providing a comprehensive description of the EPB performance. Using the gap model, volume loss prediction was carried out. Also, COB empirical method for determination of the face pressure was employed in order to compare with field monitored data. Likewise, FE simulation was used in various sections employing the code Simulia ABAQUS, to investigate the efficiency of numerical modelling for the estimating of the tunneling induced-surface settlements under such a geotechnical condition. In this regard, the main aspects of a mechanized excavation were simulated. For the studied sections, numerical simulation is not capable of reproducing the high values of in-situ-measured surface settlements, applying Mohr-Coulomb constitutive law for soil. Based on results, for the mentioned case study, the range of estimated volume loss mostly varies from 0.2% to 0.7%, having an average value of 0.45%.

Keywords

Acknowledgement

Supported by : Tabriz Urban Railway Organization (TURO)

References

  1. Ata, A.A. (1996), "Ground settlements induced by slurry shield tunnelling in stratified soils", Proceedings of the International Conference on North American Tunnelling'96, Washington, D.C., U.S.A., April.
  2. Baghban Golpasand, M.R., Do, N.A., Dias, D. and Nikudel, M.R. (2018), "Effect of the lateral earth pressure coefficient on settlements during mechanized tunneling", Geomech. Eng., 16(6), 643-654. https://doi.org/10.12989/gae.2018.16.6.643.
  3. Baghban Golpasand, M.R., Nikudel, M.R. and Uromeihy, A. (2016), "Specifying the real value of volume loss (𝑉𝐿) and its effect on ground settlement due to excavation of Abuzar tunnel, Tehran", Bull. Eng. Geol. Environ., 75(2), 485-501, https://doi.org/10.1007/s10064-015-0788-8.
  4. Das, R., Singh, P.K., Kainthola, A., Panthee, S. and Singh, T.N. (2017), "Numerical analysis of surface subsidence in asymmetric parallel highway tunnels", J. Rock Mech. Geotech. Eng., 9(1), 170-179. https://doi.org/10.1016/j.jrmge.2016.11.009.
  5. Ding, Z., Wei, X.J. and Wei, G. (2017), "Prediction methods on tunnel-excavation induced surface settlement around adjacent building", Geomech. Eng., 12(2), 185-195. http://doi.org/10.12989/gae.2017.12.2.185
  6. Fahimifar, A., Ghadami, H. and Ahmadvand, M. (2015), "The ground response curve of underwater tunnels, excavated in a strain-softening rock mass", Geomech. Eng., 8(3), 323-359. http://dx.doi.org/10.12989/gae.2015.8.3.323
  7. Fang, Y., He, C., Nazem, A., Yao, Z. and Grasmick, J. (2017), "Surface settlement prediction for EPB shield tunneling in sandy ground", KSCE J. Civ. Eng., 21(7), 2908-2918. https://doi.org/10.1007/s12205-017-0989-8.
  8. Fargnoli, V., Boldini, D. and Amorosi, A. (2013), "TBM tunnelling-induced settlements in coarse-grained soils: The case study of the new Milan underground line 5", Tunn. Undergr. Sp. Technol., 38, 336-347, https://doi.org/10.1016/j.tust.2013.07.015.
  9. Goh, A.T.C and Hefney, A.M. (2010), "Reliability assessment of EPB tunnel-related settlement", Geomech. Eng., 2(1), 57-69. http://dx.doi.org/10.12989/gae.2010.2.1.057.
  10. Guglielmetti, V., Grasso, P., Mahtab, A. and Xu, S. (2007), Mechanized Tunnelling in Urban Areas: Design Methodology and Construction Control, Taylor & Francis Group, London, U.K.
  11. Hasanpour, R., Schmitt, J., Ozcelik, Y. and Rostami, J. (2017), "Examining the effect of adverse geological conditions on jamming of a single shielded TBM in Uluabat tunnel using numerical modeling", J. Rock Mech. Geotech. Eng., 9(6), 1112-1122. https://doi.org/10.1016/j.jrmge.2017.05.010.
  12. Jones, B.D. (2010), "Low-volume-loss tunnelling for London ring main extension", Proc. Inst. Civ. Eng. Geotech. Eng., 163(3), 167-185, https://doi.org/10.1680/geng.2010.163.3.167.
  13. Kasper, T. and Meschke, G. (2006), "On the influence of face pressure, grouting pressure and TBM design in soft ground tunneling", Tunn. Undergr. Sp. Technol., 21(2), 160-171, https://doi.org/10.1016/j.tust.2005.06.006.
  14. Katebi, H., Rezaei, A.H., Hajialilue-Bonab, M. and Tarifard, A. (2015), "Assessment the influence of ground stratification, tunnel and surface buildings specification on shield tunnel lining loads (by FEM)", Tunn. Undergr. Sp. Technol., 49, 67-78, https://doi.org/10.1016/j.tust.2015.04.004.
  15. Kavvadas, M., Litsas, D., Vazaios, I. and Fortsakis., P. (2017), "Development of a 3D finite element model for shield EPB tunneling", Tunn. Undergr. Sp. Technol., 65, 22-34, https://doi.org/10.1016/j.tust.2017.02.001.
  16. Lambrughi, A., Rodriguez, L.M. and Castellanza, R. (2012), "Development and Verification of a 3D numerical model for TBM-EPB mechanized excavation", Comput. Geotech., 40, 97-113. https://doi.org/10.1016/j.compgeo.2011.10.004.
  17. Lee, K.M., Rowe, R.K. and Lo, K.Y. (1992), "Subsidence owing to tunnelling. I. Estimating the gap parameter", Can. Geotech. J., 29(6), 929-940, https://doi.org/10.1139/t92-104.
  18. Loganathan, N. (2011), An Innovative Method for Assessing Tunnelling-Induced Risks to Adjacent Structures, Parsons Brinckerhoff, Inc., New York, U.S.A.
  19. Mair, R.J. (1996), "Settlement effects of bored tunnels", Proceedings of the International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, London, U.K., April.
  20. Mair, R.J. and Taylor, R.N. (1997), "Theme lecture: Bored tunnelling in the urban environment", Proceedings of the 14th International Conference on Soil Mechanics and Foundations Engineering, Hamburg, Germany.
  21. Mazek, S.A. (2014), "Evaluation of surface displacement equation due to tunnelling in cohesionless soil", Geomech. Eng., 7(1), 55-73. http://dx.doi.org/10.12989/gae.2014.7.1.055
  22. Mohammadi, S.D., Firuzi, M. and Asghari Kaljahi, E. (2016), "Geological-geotechnical risk in the use of EPB-TBM, case study: Tabriz Metro, Iran", Bull. Eng. Geol. Environ., 75(4), 1571-1583, https://doi.org/10.1007/s10064-015-0797-7.
  23. Mooney, M.A., Grasmick, J., Kenneally, B. and Fang, Y. (2016), "The role of slurry TBM parameters on ground deformation: Field results and computational modelling", Tunn. Undergr. Sp. Technol., 57, 257-264. https://doi.org/10.1016/j.tust.2016.01.007.
  24. Netzel, H. (2009), "Building response due to ground movements", Ph.D. Thesis, Delft University of Technology, Delft, The Netherlands.
  25. Nomoto, T., Mori, H. and Matsumoto, M. (1995), "Overview on ground movements during shield tunnelling-a survey on Japanese shield tunnelling", Proceedings of the International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground.
  26. Peck, R.B. (1969), "Deep excavation and tunnelling in soft grounds", Proceedings of the 7th International Conference on Soil Mechanics and Foundation Engineering, Mexico City, Mexico.
  27. Rankin, W.J. (1988), "Ground movements resulting from urban tunnelling: predictions and effects", Proceedings of the Conference on Engineering Geology of Underground Movements, Nottingham, U.K., September.
  28. Terzaghi, K. and Peck, R. (1967), "Settlement of point bearing pile foundation", Soil Mech. Eng. Practice.
  29. Wang, F., Miao, L., Yang, X., Du, Y.J. and Liang, F.Y. (2016), "The volume of settlement trough change with depth caused by tunneling in sands", KSCE J. Civ. Eng., 20(7), 2719-2724. https://doi.org/10.1007/s12205-016-0250-x.
  30. Zhang, C., Han, K. and Zhang, D. (2015), "Face stability analysis of shallow circular tunnels in cohesive-frictional soils", Tunn. Undergr. Sp. Technol., 50, 345-357. https://doi.org/10.1016/j.tust.2015.08.007.
  31. 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.
  32. .

Cited by

  1. Evaluation of geological conditions and clogging of tunneling using machine learning vol.25, pp.1, 2019, https://doi.org/10.12989/gae.2021.25.1.059
  2. Three-dimensional finite element analysis of urban rock tunnel under static loading condition: Effect of the rock weathering vol.25, pp.2, 2019, https://doi.org/10.12989/gae.2021.25.2.099
  3. A Newly Developed State-of-the-Art Full-Scale Excavation Testing Apparatus for Tunnel Boring Machine (TBM) vol.25, pp.12, 2021, https://doi.org/10.1007/s12205-021-2347-0