Correlación entre el índice RMR de Bieniawski y el índice Q de Barton en formaciones sedimentarias de grano fino
- J. D. Fernández-Gutiérrez 1
- H. Pérez-Acebo 2
- D. Mulone-Andere 3
- 1 Geoconsult Ingenieros Consultores, Bilbao, España
- 2 Universidad del País Vasco (UPV/EHU), España
- 3 Red Ferroviaria Vasca ETS/RFV, España
ISSN: 0020-0883
Año de publicación: 2017
Volumen: 69
Número: 547
Tipo: Artículo
Otras publicaciones en: Informes de la construcción
Resumen
From the XX century, various rock mass classification systems have been proposed. Among them, the Bieniawski’s RMR system and Barton’s Q system have emerged as the most used rock mass classification worldwide. Correlations between both indices have been proposed, usually with a wide scattering of the data used in deriving the equations. However, it has been observed that correlations established for a specific geological unit fit better. The aim of this paper is to propose a correlation between RMR and Q indices for fine-grained sedimentary rock formations, normally found in the area of Bilbao (Spain), by means of the collected data during the excavation of the tunnel Etxebarri-Casco Viejo of the line 3 of the Metropolitan Railway of Bilbao. Obtained equation shows a high correlation coefficient and a unique relationship between the two classification systems has been proposed, not depending on the choice of the independent variable.
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