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Erschienen in: Bulletin of Engineering Geology and the Environment 3/2014

01.08.2014 | Original Paper

The effects of discontinuity surface roughness on the shear strength of weathered granite joints

verfasst von: Ali Özvan, İsmail Dinçer, Altay Acar, Burcu Özvan

Erschienen in: Bulletin of Engineering Geology and the Environment | Ausgabe 3/2014

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Abstract

Surface roughness is one of the most important parameters governing the shear strength of rock discontinuities. Roughness types may vary based on genesis, physico-mechanical, and mineralogical properties of rocks. In this study, granite samples representing three different weathering degrees were selected to evaluate the effects of surface roughness and weathering degree on shear strength. To this aim, we determined the profile roughness coefficient (PRC), profile roughness angle (PRA), and joint roughness coefficient (JRC) for the selected fresh and weathered granite joint samples. Values of PRC were in the range of about 1.043–1.073, and PRA and JRC varied in the ranges of 16.67–21.45 and 12–18, respectively. Weathering led to the increment of joint surface roughness of the selected granitic joints due to the higher resistance of quartz crystals in the weathered matrix. However, the increment in surface roughness did not result in an increase in the shear strength. On the contrary, the shear strength of discontinuities dramatically decreased.

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Metadaten
Titel
The effects of discontinuity surface roughness on the shear strength of weathered granite joints
verfasst von
Ali Özvan
İsmail Dinçer
Altay Acar
Burcu Özvan
Publikationsdatum
01.08.2014
Verlag
Springer Berlin Heidelberg
Erschienen in
Bulletin of Engineering Geology and the Environment / Ausgabe 3/2014
Print ISSN: 1435-9529
Elektronische ISSN: 1435-9537
DOI
https://doi.org/10.1007/s10064-013-0560-x

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