Abstract
We present a comparison between the performances of “Strength Reduction” and “Unloading” techniques in the computational application of the so-called “Material Factor Approach” to the stability assessment of tunnel faces. In this framework, we also propose a new unloading-based safety factor for tunnel stability, as an effective alternative to a commonly used, but faulty, loading-based safety factor.
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References
Alsahly, A., Meschke, G.: Error-controlled adaptive simulation and numerical assessment of face stability in mechanized tunneling. In: Computer Methods and Recent Advances in Geomechanics, 1991–1998. Taylor & Francis Group, London (2015)
Anagnostou, G., Schuerch, R., Perazzelli, P., Vrakas, A., Maspoli, P., Poggiati, R.: Tunnel face stability and tunnelling induced settlements under transient conditions. Eidgenössisches Departement für UVEK, Bundesamt für Strassen (1592)
BASt.: Zusätzliche Technische Vertragsbedingungen und Richtlinien für Ingenieurbauten (ZTV-ING) – Teil 5 Tunnelbau. Abschnitt 3, Bundesanstalt für Strassenwesen (2012)
Callari, C.: Numerical assessment of tunnel face stability below the water table. In: Computer Methods and Recent Advances in Geomechanics, 2007–2010. Taylor & Francis, London (2015)
Callari, C., Abati, A.: Finite element methods for unsaturated porous solids and their application to dam engineering problems. Comput. Struct. 87(7–8), 485–501 (2009)
Callari, C., Casini, S.: Tunnels in saturated elasto-plastic soils: three-dimensional validation of a plane simulation procedure. In: Mechanical Modelling and Computational Issues in Civil Engineering, pp. 143–164. Springer, Heidelberg (2005)
Callari, C., Alsahly, A., Meschke, G.: Assessment of stand-up time and advancement rate effects for tunnel faces below the water table. In: Computational Methods in Tunneling and Subsurface Engineering (EURO:TUN 2017). University Innsbruck (2017)
C.E.N.: Eurocode 7: Geotechnical design. European Standard EN 2004 (1997)
Jancsecz, S.: Modern shield tunneling in the view of geotechnical engineering: a reappraisal of experiences. In: Proceedings of 14th ICSMFE, vol. 3, pp. 1415–1420. Balkema Verlag, Rotterdam (1997)
Jancsecz, S., Steiner, W.: Face support for a large mix-shield in heterogeneous ground conditions. In: Proceedings Tunnelling 94, pp. 531–550. Chapman & Hall, London (1994)
Leca, E., Panet, M.: Application du calcul à la rupture à la stabilité du front de taille d’un tunnel. Revue française de géotechnique 43, 5–19 (1988)
Leca, E., Dormieux, L.: Upper and lower bound solutions for the face stability of shallow circular tunnels in frictional material. Geotechnique 40(4), 581–606 (1990)
Sterpi, D., Cividini, A.: A physical and numerical investigation on the stability of shallow tunnels in strain softening media. Rock Mech. Rock Eng. 37(4), 277–298 (2004)
Vermeer, P.A., Ruse, N.M., Marcher, T.: Tunnel heading stability in drained ground. Felsbau 20(6), 8–18 (2002)
Zienkiewicz, O.C., Humpheson, C., Lewis, R.W.: Associated and non-associated visco-plasticity and plasticity in soil mechanics. Géotechnique 25(4), 671–689 (1975)
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Callari, C. (2021). Assessment of Tunnel Stability: Safety Factors and Numerical Techniques. In: Barla, M., Di Donna, A., Sterpi, D. (eds) Challenges and Innovations in Geomechanics. IACMAG 2021. Lecture Notes in Civil Engineering, vol 126. Springer, Cham. https://doi.org/10.1007/978-3-030-64518-2_2
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DOI: https://doi.org/10.1007/978-3-030-64518-2_2
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