The Effects of Fines on the Response of Granular Soil during Earth Pressure Balance (EPB) Shield Tunneling
Publication: Geo-Congress 2023
ABSTRACT
Studying the behavior of surrounding soil in in situ environments during earth pressure balance (EPB) shield tunneling is deemed of great importance, and the discrete element method (DEM) has been commonly adopted for replicating the granular soil and capturing the qualitative behavior of ground response during tunnel advancement. The presence of fines has been proven to affect the soils’ skeleton structures and may dominate their shear strength. However, a significant body of research in tunneling engineering does not often consider sand-fine mixtures, although the natural soil consists of some portions of fines. This numerical study focused on simulating the EPB shield tunneling in granular material containing different fines contents, and the advancement of EPB shield tunneling in the longitudinal direction was reproduced using two-dimensional DEM models. The macroscopic behavior, such as horizontal stress at the tunnel face, and the surface displacement after excavation were investigated. In addition, the micro-mechanical aspect of soil behavior (i.e., contact density) was computed and examined. Finally, the effect of muck discharge rate, which was simulated by deleting the particles within the inlet area, was analyzed.
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REFERENCES
Barnett, N., Rahman, M. M., Karim, M. R., and Nguyen, H. B. K. (2020). “Evaluating the particle rolling effect on the characteristic features of granular material under the critical state soil mechanics framework.” Granular Matter, 22(89), 1–24.
Barnett, N., Rahman, M. M., Karim, M. R., Nguyen, H. B. K., and Carraro, J. A. H. (2021). “Equivalent state theory for mixtures of sand with non-plastic fines: a DEM investigation.” Géotechnique, 71(5), 423–440.
Cao, X., Zhu, Y., and Gong, J. (2021). “Effect of the intermediate principal stress on the mechanical responses of binary granular mixtures with different fines contents.” Granular Matter, 23(37), 1–19.
Cao, Y., Nguyen, H. B. K., Rahman, M. M., and Cheng, W.-C. (2022). “Soil behavior in the earth pressure balance (EPB) shield tunnelling-a DEM study.” Geo-Congress 2022, A. Lemnitzer, Ph.D., and A. W. Stuedlein, Ph.D., P.E., eds., American Society of Civil Engineers, North Carolina, United States of America, 690–698.
Carraro, J. A. H., and Prezzi, M. (2008). “A new slurry-based method of preparation of specimens of sand containing fines.” Geotechnical Testing Journal, 31(1), 1–11.
Chen, R. P., Tang, L. J., Ling, D. S., and Chen, Y. M. (2011). “Face stability analysis of shallow shield tunnels in dry sandy ground using the discrete element method.” Computers and Geotechnics, 38(2), 187–195.
Climent, N., Arroyo, M., O’Sullivan, C., and Gens, A. (2014). “Sand production simulation coupling DEM with CFD.” European Journal of Environmental and Civil Engineering, 18(9), 983–1008.
Cundall, P. A., and Strack, O. D. L. (1979). “The development of constitutive laws for soil using the distinct element method.” Numerical Methods in Geomechanics, 1, 289–317.
Gong, C., Ding, W., and Xie, D. (2020). “Twin EPB tunneling-induced deformation and assessment of a historical masonry building on Shanghai soft clay.” Tunnelling and Underground Space Technology, 98, 103300.
Hu, X., He, C., Lai, X., Walton, G., Fu, W., and Fang, Y. (2020). “A DEM-based study of the disturbance in dry sandy ground caused by EPB shield tunneling.” Tunnelling and Underground Space Technology, 101, 103410.
Itasca. 2014. Particle Flow Code, version 5.0Itasca Consulting Group Incorporated, Minneapolis, United States.
Lashkari, A., Shourijeh, P. T., Khorasani, S. S. S., Irani, N., and Rahman, M. M. (2022). “Effects of over-consolidation history on flow instability of clean and silty sands.” Acta Geotechnica.
Liu, D., Zhang, X., and Zhang, Z. (2017). “Discrete element analysis of the excavation effect of cross-river tunnel on the surroundings.” MATEC Web of Conferences, 108(16003), 1–4.
Maynar, M. J., and Rodríguez, L. E. (2005). “Discrete numerical model for analysis of earth pressure balance tunnel excavation.” Journal of geotechnical and geoenvironmental engineering, 131(10), 1234–1242.
Nguyen, H. B. K., and Rahman, M. M. (2017). “The role of micro-mechanics on the consolidation history of granular materials.” Australian Geomechanics, 52(3), 27–36.
Nguyen, H. B. K., Rahman, M. M., and Cameron, D. (2015). “Undrained Behavior of Sand by DEM Study.” Geo-Congress 2015, M. Iskander, M. T. Suleiman, J. B. Anderson, and D. F. Laefer, eds., American Society of Civil Engineers, 182–191.
Nguyen, H. B. K., Rahman, M. M., and Fourie, A. B. (2021a). “The critical state behaviour of granular material in triaxial and direct simple shear condition: A DEM approach.” Computers and Geotechnics, 138, 104325.
Nguyen, H. B. K., Rahman, M. M., and Fourie, A. B. (2021b). “How particle shape affects the critical state, triggering of instability and dilatancy of granular materials – results from a DEM study.” Géotechnique, 71(9), 749–764.
O’Sullivan, C., and Bray, J. (2004). “Selecting a suitable time step for discrete element simulations that use the central difference time integration scheme.” Engineering Computations, 21, 278–303.
Qu, T., Wang, S., Fu, J., Hu, Q., and Zhang, X. (2019). “Numerical examination of EPB shield tunneling–induced responses at various discharge ratios.” Journal of Performance of Constructed Facilities, 33(3), 04019035.
Rahman, M. M. (2021). “The State of Art on Equivalent State Theory for Silty Sands.” Latest Developments in Geotechnical Earthquake Engineering and Soil Dynamics, T. G. Sitharam, R. Jakka, and S. Kolathayar, eds., Springer Singapore, Singapore, 225–246.
Rahman, M. M., and Lo, S. R. (2008). “The prediction of equivalent granular steady state line of loose sand with fines.” Geomechanics and geoengineering, 3(3), 179–190.
Rahman, M. M., Nguyen, H. B. K., Fourie, A. B., and Kuhn, M. (2021). “Critical state soil mechanics for cyclic liquefaction and post-liquefaction behaviour: DEM study.” Journal of Geotechnical and Geoenvironmental Engineering, 147(2), 04020166.
Shirlaw, J. (2016). “Pressurised TBM tunnelling in mixed face conditions resulting from tropical weathering of igneous rock.” Tunnelling and underground space technology, 57, 225–240.
Sirivachiraporn, A., and Phienwej, N. (2012). “Ground movements in EPB shield tunneling of Bangkok subway project and impacts on adjacent buildings.” Tunnelling and underground space technology, 30, 10–24.
Soranzo, E., Guardiani, C., and Wu, W. (2022). “A soft computing approach to tunnel face stability in a probabilistic framework.” Acta Geotechnica, 17, 1217–1238.
Thornton, C. (2000). “Numerical simulations of deviatoric shear deformation of granular media.” Géotechnique, 50(1), 43–53.
Wang, S., Qu, T., Fang, Y., Fu, J., and Yang, J. (2019). “Stress responses associated with earth pressure balance shield tunneling in dry granular ground using the discrete-element method.” International Journal of Geomechanics, 19(7), 04019060.
Wu, L., Guan, T., and Lei, L. (2013). “Discrete element model for performance analysis of cutterhead excavation system of EPB machine.” Tunnelling and Underground Space Technology, 37, 37–44.
Ye, X., Wang, S., Yang, J., Sheng, D., and Xiao, C. (2017). “Soil conditioning for EPB shield tunneling in argillaceous siltstone with high content of clay minerals: case study.” International Journal of Geomechanics, 17(4), 05016002.
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Published online: Mar 23, 2023
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