Numerical solutions for tunnels excavated in strain-softening rock masses considering a combined support system
作者： Fei Song , Alfonso Rodriguez-Dono
DOI: 10.1016/J.APM.2020.11.042
关键词:
摘要: Abstract In this article, an alternative numerical procedure to calculate displacements and stresses of supported circular tunnels is proposed, considering the whole process tunnel advancement, sequential installation primary secondary support systems. derivation, plastic area rock mass divided into a large number annuli around tunnel, then Finite Difference Method employed. First, strain-softening behaviour model taken simulate post-failure mass. Furthermore, Mohr-Coulomb or Hoek-Brown failure criteria can be chosen, non-associated flow rule assumed dilatancy considered. After that, fictitious forces concept used thus, three-dimensional effect face Finally, solutions for supports obtained, by using compatibility conditions at both rock-support support-support interfaces. The results obtained from these agree well with those self-similar openings, were verified. proposed method has been compared convergence-confinement method. Parametric analyses are carried out investigate sensitivity selection. Then, application in design presented. provides convenient preliminary tunnels.
sci-hub.st 参考文章(67)
Carlos Carranza-Torres, Evert Hoek, Brent Corkum, HOEK-BROWN FAILURE CRITERION - 2002 EDITION ,(2002)
Lan Cui, Jun-Jie Zheng, Rong-Jun Zhang, Han-Jiang Lai, A numerical procedure for the fictitious support pressure in the application of the convergence–confinement method for circular tunnel design International Journal of Rock Mechanics and Mining Sciences. ,vol. 78, pp. 336- 349 ,(2015) , 10.1016/J.IJRMMS.2015.07.001
Apostolos Vrakas, Georgios Anagnostou, A finite strain closed-form solution for the elastoplastic ground response curve in tunnelling International Journal for Numerical and Analytical Methods in Geomechanics. ,vol. 38, pp. 1131- 1148 ,(2014) , 10.1002/NAG.2250
E. Alonso, L. R. Alejano, F. Varas, G. Fdez-Manin, C. Carranza-Torres, Ground response curves for rock masses exhibiting strain-softening behaviour International Journal for Numerical and Analytical Methods in Geomechanics. ,vol. 27, pp. 1153- 1185 ,(2003) , 10.1002/NAG.315
J. Sulem, M. Panet, A. Guenot, An analytical solution for time-dependent displacements in a circular tunnel International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts. ,vol. 24, pp. 155- 164 ,(1987) , 10.1016/0148-9062(87)90523-7
C. Carranza-Torres, B. Rysdahl, M. Kasim, On the elastic analysis of a circular lined tunnel considering the delayed installation of the support International Journal of Rock Mechanics and Mining Sciences. ,vol. 61, pp. 57- 85 ,(2013) , 10.1016/J.IJRMMS.2013.01.010
Kyung-Ho Park, Bituporn Tontavanich, Joo-Gong Lee, A simple procedure for ground response curve of circular tunnel in elastic-strain softening rock masses Tunnelling and Underground Space Technology. ,vol. 23, pp. 151- 159 ,(2008) , 10.1016/J.TUST.2007.03.002
Ahmad Fahimifar, Masoud Ranjbarnia, Analytical approach for the design of active grouted rockbolts in tunnel stability based on convergence-confinement method Tunnelling and Underground Space Technology. ,vol. 24, pp. 363- 375 ,(2009) , 10.1016/J.TUST.2008.10.005
Shuilin Wang, Shunde Yin, Zhenjun Wu, Strain‐softening analysis of a spherical cavity International Journal for Numerical and Analytical Methods in Geomechanics. ,vol. 36, pp. 182- 202 ,(2012) , 10.1002/NAG.1002
Ahmad Fahimifar, Farshad Monshizadeh Tehrani, Ahmadreza Hedayat, Arash Vakilzadeh, Analytical solution for the excavation of circular tunnels in a visco-elastic Burger’s material under hydrostatic stress field Tunnelling and Underground Space Technology. ,vol. 25, pp. 297- 304 ,(2010) , 10.1016/J.TUST.2010.01.002