Efecto del desgaste de la roca y de la velocidad de ensayo en la determinación mediante tilt test del ángulo de fricción básico de juntas en roca
- Ignacio Pérez Rey 1
- Hatim Dellero
- Leandro R. Alejano
- Elisa Grande
- Andrea Muñoz
- Javier Arzúa
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1
Universidade de Vigo
info
ISSN: 0213-8468
Ano de publicación: 2017
Número: 187
Páxinas: 43-52
Tipo: Artigo
Outras publicacións en: Ingeniería civil
Resumo
Basic friction angle is an essential parameter for estimating the shear strength of rock joints, according to Barton´s equation besides other suggested criteria. This parameter can be obtained in laboratory by means of tilt tests. Nevertheless, there is no suggested methodology nor generalised procedure yet to experimentally obtain this parameter. In the present study, the effect of wear, a consequence of repetitive sliding along the same rock surface, is investigated as well as the influence of rotational speed of the tilting table on results. Five different velocities were considered and five rock surfaces for a moderately weathered granite were tested five times for each velocity. Results indicate that rotational speed does not affect results in a significant manner; conversely, wear was reported to relevantly affect results, as observed by decaying trends of test series. Results and observations derived from this study may be used as the basis for developing a thorough methodology to obtain basic friction angle of rock joints in laboratories.