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Title: Determining of the Joint Roughness Coe cient (JRC) of Rock Discontinuities Based on the Theory of Random Fields
Authors: Gravanis, Elias 
Pantelidis, Lysandros 
Major Field of Science: Engineering and Technology
Field Category: Civil Engineering
Keywords: Joint roughness coe cient;Barton-Bandis criterion;Random fields;Spatial correlation length;Fourier analysis;Probabilistic analysis
Issue Date: Jul-2019
Source: Geosciences, 2019, vol. 9, no. 7, articl. no. 295
Volume: 9
Issue: 7
Journal: Geosciences 
Abstract: This work intends to embed the estimation of the joint roughness coe cient (JRC) in the framework of random fields. The random field method is a probabilistic approach which involves modeling of the spatial variability of the pertinent physical quantities as a fundamental part of the (assumed) underlying probabilistic structure. Although this method is one of higher complexity in regard of the presumed background knowledge, it encodes naturally subtler information about the rock surface roughness. It is noted that, the proposed random field approach considers automatically the scale of the problem (no correction factor is needed), whilst the JRC estimates appear to be more stable (compared to those derived from Z2 or SF) in the sense that images of the same profile but of di erent quality give similar results for its roughness. The present work could also be useful in advanced probabilistic rock slope stability analysis based on random fields. In such a case, the required spatial correlation length can be obtained by the proposed = 145.5 /JRC relationship ( = variance of the profile). The JRC can be obtained through tilt tests, push or pull tests, or matching roughness profiles, whilst can be obtained from inspection of the digitized profile.
ISSN: 2076-3263
DOI: 10.3390/geosciences9070295
Rights: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license
Attribution-NonCommercial-NoDerivatives 4.0 International
Type: Article
Affiliation : Cyprus University of Technology 
Appears in Collections:Άρθρα/Articles

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