Estimation of Long-Term Strength of Rock Based on Subcritical Crack Growth

  • Yoshitaka NaraEmail author
  • Yuma Oe
  • Sumihiko Murata
  • Tsuyoshi Ishida
  • Katsuhiko Kaneko
Conference paper


In this study, based on information about subcritical crack growth, the long-term strength of rock was estimated with consideration of changes in environmental conditions. The long-term strength of granite is known to be lower in water than in air. From the estimation of the long-term strength for the situation where the surrounding environment changes from air to water, it was revealed that when the environmental condition was changed from air to water, the long-term strength converged to that of rock continuously in water, even when a dry condition (where rock was kept in air) had been maintained for a long time (1 or 100 years). The results of long-term strength estimation indicate that the acceleration of crack growth in water strongly influences the estimated long-term strength of granite. It is therefore concluded that water has a significant influence on the long-term stability of rock mass structures such as rock slopes.


Subcritical crack growth Long-term strength Granite Water 


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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Yoshitaka Nara
    • 1
    Email author
  • Yuma Oe
    • 1
  • Sumihiko Murata
    • 1
  • Tsuyoshi Ishida
    • 1
  • Katsuhiko Kaneko
    • 2
  1. 1.Graduate School of EngineeringKyoto UniversityKyotoJapan
  2. 2.Faculty of EngineeringHokkaido UniversityHokkaidoJapan

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