Informes de la Construcción, Vol 69, No 547 (2017)

Correlación entre el índice RMR de Bieniawski y el índice Q de Barton en formaciones sedimentarias de grano fino


https://doi.org/10.3989/id54459

J. D. Fernández-Gutiérrez
Geoconsult Ingenieros Consultores, España
orcid http://orcid.org/0000-0003-3814-837X

H. Pérez-Acebo
Departamento de Ingeniería Mecánica, Universidad del País Vasco UPV/EHU, España
orcid http://orcid.org/0000-0003-0577-9597

D. Mulone-Andere
Eusko Trenbide Sarea/Red Ferroviaria Vasca ETS/RFV, España
orcid http://orcid.org/0000-0003-4904-4779

Resumen


Desde el siglo XX se han propuesto varios sistemas de clasificación del macizo rocoso. Entre ellos destacan el sistema RMR de Bieniawski y el sistema Q de Barton, que son las clasificaciones más empleadas en todo el mundo. Se han propuesto numerosas relaciones entre ambos índices, que normalmente tienen gran dispersión de datos. Sin embargo, se ha observado que las correlaciones establecidas para litologías específicas son más precisas. El objetivo de este artículo es proponer una correlación entre el índice RMR y Q para formaciones sedimentarias de grano fino, habituales en la zona de Bilbao (España), mediante los datos recopilados in situ durante la excavación del túnel Etxebarri-Casco Viejo de la línea 3 del Ferrocarril Metropolitano de Bilbao. La ecuación obtenida muestra un alto grado de correlación y se ha propuesto una relación única entre los dos sistemas de clasificación, que no depende de la variable independiente escogida.

Palabras clave


índice RMR; índice Q; clasificación del macizo rocoso; excavación de túneles; geomecánica; roca sedimentaria

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Referencias


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