Multiscale stability analysis of a tunnel in swelling rockmass applying secant stiffness

Xiaodong Liu, Junji Kato, Takashi Kyoya

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

Abstract

Damage of tunnels often occurs in Japan caused by swelling smectite rockmass. For an effective countermeasure against the damage, mechanical interaction between tunnel lining and swelling rock mass are analyzed by a two-scale analysis based on a homogenization theory in this study. In the microscopic scale, swelling of smectite minerals and damage process of surrounding intact rocks induced by the swelling of smectite minerals are analyzed by a 3D continuous damage model. This microscopic analysis provides the averaged volumetric change and the damaged macroscopic stiffness of the representative volumetric element (RVE) of rock mass. In the macroscopic scale, therefore, stress distribution within/around the tunnel lining can be reasonably analyzed by using the averaged secant stiffness and its volumetric strain of the RVE. The mechanical interaction between the tunnel lining and swelling rock mass is discussed and examined as some case studies are carried out.

Original languageEnglish
Title of host publication4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017
PublisherInternational Society for Rock Mechanics
Pages284-287
Number of pages4
ISBN (Electronic)9791156103158
Publication statusPublished - 2017 Jan 1
Event4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017 - Jeju, Korea, Republic of
Duration: 2017 May 102017 May 13

Publication series

Name4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017
Volume2017-May

Other

Other4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017
CountryKorea, Republic of
CityJeju
Period17/5/1017/5/13

Keywords

  • Homogenization
  • Multi-scale analysis
  • Secant stiffness
  • Swelling rock

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geophysics

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  • Cite this

    Liu, X., Kato, J., & Kyoya, T. (2017). Multiscale stability analysis of a tunnel in swelling rockmass applying secant stiffness. In 4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017 (pp. 284-287). (4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017; Vol. 2017-May). International Society for Rock Mechanics.