Journal
GEOTECHNIQUE
Volume 62, Issue 5, Pages 415-427Publisher
ICE PUBLISHING
DOI: 10.1680/geot.10.P.079
Keywords
dams; particle crushing/crushability; shear strength
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Funding
- French Agence Nationale pour la Recherche (ANR)
- Chinese Scholarship Council
- EIFFAGE Travaux Publics
- Electricite de France-CIH
- Laboratoire de Mecanique des Solides from Ecole Polytechnique
- Institut de Recherche en Genie Civil et Mecanique from Ecole Centrale Nantes
- Centre d'Etudes Techniques de l'Equipement- Laboratoire Regional des Ponts et Chaussees Lyon
- Coyne et Bellier Ingenieurs-Conseils
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The shear strength of coarse granular materials, widely used in civil works such as rockfill in dam construction, is seldom measured because of severe practical experimental limitations. This paper presents an original method for evaluating the shear strength of such materials, based on size effects in granular materials affected by grain breakage according to fracture mechanics. Through a general size effect relation operating on shear strength envelopes, this method makes it possible to determine the shear strength of a coarse-grained granular material from the measured properties of a finer-grained granular material made of the same mineral. In the paper, the method is explicitly proved, taking into account the statistical distribution of breakage resistances of particles with different sizes, within materials that can be considered as physically similar, particularly having parallel grain size distributions and the same compactness. A wide set of independent experimental results is shown to validate the method consistently.
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