NON-LINEAR RHEOLOGICAL ANALYSIS OF DEEPLY LOCATED TUNNELS.

Tomoyuki Akagi, Yasuaki Ichikawa, Hidetaka Kuroda, Toshikazu Kawamoto

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A rheological model which is able to explain the delayed failure pheonomenon has been proposed and applied to the analysis of the time dependent behavior of deep tunnels. The model is the three element Voigt type before yielding and becomes the five element Voigt type after yielding. This means that the stiffness of the model is decreased by yielding. It is assumed that the yielding takes place when the stored elastic energy density of distortion reaches a certain maximum value. Some experiments to determine material constants are proposed. The numerical results clearly exhibited a delayed failure state of the rock masses around the tunnel surface. It was found that the extension of the yielding zone due to tunnel excavation depends on the opening method.

Original languageEnglish
Pages (from-to)457-471
Number of pages15
JournalInternational Journal for Numerical and Analytical Methods in Geomechanics
Volume8
Issue number5
Publication statusPublished - Sep 1984
Externally publishedYes

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ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Computational Mechanics
  • Mechanics of Materials
  • Materials Science(all)

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