Investigation on the Cause of Damages of a Deep Tunnel
Publication: International Journal of Geomechanics
Volume 12, Issue 6
Abstract
A study is presented on the damages that developed in the segmented precasted concrete liner of a deep tunnel excavated by means of a tunnel boring machine (TBM). Various possible causes are considered i.e., the pore-water pressure acting on the liner; the excessive mountain pressure; the anisotropic in situ stress field; and the incomplete filling of the rock-lining gap. The in situ investigation, carried out to quantitatively assess the level and the extent of the damages, ruled out the pore pressure as the main source. In fact, minor water leakages were observed at the fractured sections. The remaining alternatives were analyzed through a series of nonlinear finite-element calculations in the plane strain regime. They account for the strain softening behavior of the lining and for the lack of tensile stresses at the rock-lining interface. The results give insight into the rock-liner interaction and show that the observed damages are likely to depend on the incomplete filling of the gap. On this basis some conclusions are drawn on the stresses developing within the liner and on the procedures suitable for its structural rehabilitation.
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References
Association Française des Tunnels et de l’Espace Souterrain (AFTES). (1993). “Considerations on the usual methods of tunnel lining design.” GT7R2A1, AFTES, Paris, 165–187.
Cividini, A., and Gioda, G. (1992). “Finite element analysis of direct shear tests on stiff clays.” Int. J. Numer. Analyt. Meth. Geomech., 16(12), 869–886.
Contini, A., Cividini, A., and Gioda, G. (2007). “Numerical evaluation of the surface displacements due to soil grouting and to tunnel excavation.” Int. J. Geomech., 7(3), 217–226.
Falliti, P., and Marchiori, S. (2003). “Galleria Sorenberg: Scavo con TBM in ambiente esplosivo.” Guida al tunneling, M. Bringiotti, ed., Pei, Parma, Italy, 187–192.
Locatelli, L., Borgonovo, G., and Gioda, G. (2004). “A consistent approach to the structural rehabilitation of tunnel liners.” Proc., 18th TAC National Conf. on Advances in Tunnelling and Trenchless Techniques, C. D. Martin, ed., Edmonton, Canada, Tunnelling Association of Canada, 25, 1–10.
Locatelli, L., Borgonovo, G., and Gioda, G. (2005). “A design procedure for the rehabilitation of tunnel liners.” Proc., 11th Conf. of the International Association for Computer Methods and Advances in Geomechanics, G. Barla and M. Barla, eds., Patron, Bologna, Italy, Vol. 3, 35–42.
Pietruszczak, S., and Stolle, D. F. E. (1985). “Deformation of strain softening materials. Part I: objectivity of finite element solution based on conventional strain softening formulation.” Comput. Geotech., 1(2), 99–115.
Sterpi, D., and Gioda, G. (2009). “Visco-plastic behaviour around advancing tunnels in squeezing rock.” Rock Mech. Rock Eng., 42(2), 319–339.
Zienkiewicz, O. C., Valliappan, S., and King, I. P. (1969). “Elasto-plastic solutions of engineering problems ‘initial stress,’ finite element approach.” Int. J. Numer. Methods Eng., 1(1), 75–100.
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Information
Published In
International Journal of Geomechanics
Volume 12 • Issue 6 • December 2012
Pages: 722 - 731
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Jun 13, 2010
Accepted: Dec 27, 2010
Published online: Nov 15, 2012
Published in print: Dec 1, 2012
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