On the evaluation of JRC effect on the shear strength of rock joints: reverse modelling of rock joints using a geostatistical semivariogram model and 3D printing
Ghasem Shams, Patrice Rivard
Dans les comptes rendus d’articles de la conférence: GeoSt. John's 2019: 72nd Canadian Geotechnical ConferenceSession: Rock Mechanics
ABSTRACT: Barton’s criterion assumes that the rock joints with the same JRCs tested under the same conditions (same normal loading, same shear loading rate, etc.) have to result in the same shear strength. This paper aims at challenging this assumption. Reverse modeling of natural rock joints was applied to randomly generate the joint profiles with given JRCs (JRC 5 and 19) based on a previously developed statistical model. Then, a 3D printer was used to manufacture physical molds based on the morphology of generated joint profiles for casting mortar. Finally, direct shear tests were conducted in the lab on the cast mortar joint specimens with various surface morphologies. The experimental results indicated that the joint profiles with almost the same JRC values, but with different surface morphologies, lead to different shear strengths. It is concluded that the JRC might not appropriately represent the shear strength of rock joints, even for joints with the same properties.
Please include this code when submitting a data update: GEO2019_311
Retrouver cet article:
Les membres de la Société canadienne de géotechnique peuvent accéder à cet article, ainsi qu'à tous les autres articles de la Conférence Géotechnique Canadienne, dans le Espace membre. Les comptes rendus d'articles sont également disponibles dans de nombreuses bibliothèques.
Citer cet article:
Shams, Ghasem, Rivard, Patrice (2019) On the evaluation of JRC effect on the shear strength of rock joints: reverse modelling of rock joints using a geostatistical semivariogram model and 3D printing in GEO2019. Ottawa, Ontario: Canadian Geotechnical Society.
@article{Shams_GEO2019_311,
author = Ghasem Shams, Patrice Rivard,
title = On the evaluation of JRC effect on the shear strength of rock joints: reverse modelling of rock joints using a geostatistical semivariogram model and 3D printing,
year = 2019
}
title = On the evaluation of JRC effect on the shear strength of rock joints: reverse modelling of rock joints using a geostatistical semivariogram model and 3D printing,
year = 2019
}