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Bulletin of Engineering Geology and the Environment
Published in: Bulletin of Engineering Geology and the Environment 3/2008

01-08-2008 | Original Paper

Estimating the joint roughness coefficient of discontinuities found in metamorphic rocks

Authors: Pedro Santarém Andrade, António Almeida Saraiva

Published in: Bulletin of Engineering Geology and the Environment | Issue 3/2008

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Abstract

The paper presents the results of different methods of determining the roughness of joints in quartzites, metagreywackes and phyllites obtained from road cuts in central Portugal. The evaluation of the joint roughness coefficient (JRC) was carried out using graphical and analytical procedures. Differences were found between the JRC graphic and the JRC calculated, depending on the method used. The JRC calculated values obtained by the tilt tests and the Schmidt rebound hammer tests were compared to the JRC calculated values established from the rock joint shear tests. It is concluded that if JRC is to be used, it is essential to specify how it was established.
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Literature
Barton NR, Bandis SC (1990) Review of predictive capabilities of JRC–JCS model in engineering practice. In: Proceedings of the international conference on rock joints. Proc Int Conf Rock Joints 603–610
Barton NR, Choubey V (1977) The shear strength of rock joints in theory and practice. Rock Mech 10:1–54CrossRef
Hack R (1998) Slope stability probability classification. In: ITC, International Institute for Geo-Information and Earth Sciences. Enschede, The Netherlands, 258 pp
Hack R, Price D, Rengers N (2003) A new approach of rock slope stability—a probability classification (SSPC). Bull Eng Geol Environ 62:167–184
International Society for Rock Mechanics—Turkish National Group (ISRM-TNG) (2007) The complete ISRM suggested methods for rock characterization, testing and monitoring: 1974–2006. In: Ulusay R, Hudson JA (eds) Ankara, Turkey, pp 165–173
Serviços Geológicos de Portugal (SGP) (1992) Carta geológica de Portugal—escala 1:500 000. Lisboa, Portugal
Metadata
Title
Estimating the joint roughness coefficient of discontinuities found in metamorphic rocks
Authors
Pedro Santarém Andrade
António Almeida Saraiva
Publication date
01-08-2008
Publisher
Springer-Verlag
Published in
Bulletin of Engineering Geology and the Environment / Issue 3/2008
Print ISSN: 1435-9529
Electronic ISSN: 1435-9537
DOI
https://doi.org/10.1007/s10064-008-0151-4

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