The effect of ground drainage on the mechanical response of deep lined tunnels excavated in elastic and elasto-plastic materials

C. Carranza-Torres, J. Zhao

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

This paper revisits the classical problem of excavating a deep cylindrical tunnel in a saturated elastic porous ground that obeys Terzaghi's effective stress principle. A generalized form of the classical two-dimensional analytical solution by Lamé for the problem of excavating a circular tunnel in elastic medium subject to axi-symmetric loading is presented. The new solution considers the long-term (i.e., post-transient) mechanical effect of changes in pore pressure due to drainage of the ground around the opening on the mechanical response of the tunnel. This solution together with the analytical solution for axi-symmetric loading of an annular ring representing a liner are used to explain the effect that changes in pore-pressure in the ground have on the loads induced on the support. Analytical results are compared with results obtained with a finite difference code. The finite difference approach is also used to extend the analysis to cases in which the ground behaves inelastically.

Original languageEnglish
Title of host publication12th International Conference on Computer Methods and Advances in Geomechanics 2008
Pages4236-4248
Number of pages13
Publication statusPublished - 1 Dec 2008
Externally publishedYes
EventInternational Conference of the International Association for Computer Methods and Advances in Geomechanics 2008 - Goa, India
Duration: 1 Jan 20086 Oct 2008
Conference number: 12th

Publication series

Name12th International Conference on Computer Methods and Advances in Geomechanics 2008
Volume6

Conference

ConferenceInternational Conference of the International Association for Computer Methods and Advances in Geomechanics 2008
Abbreviated titleIACMAG 2008
CountryIndia
CityGoa
Period1/01/086/10/08

Keywords

  • Convergence-confinement
  • Drainage
  • Support
  • Terzaghi effective stress principle
  • Tunnel

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