Accurate determination of joint roughness coefﬁcient (JRC) of rock joints is essential for evaluating the inﬂuence of surface roughness on the shear behavior of rock joints. The JRC values of rock joints are typically measured by visual comparison against Barton’s standard JRC proﬁles. However, its accuracy is strongly affected by personal bias. In the present study, a new comparison method is proposed for JRC evaluation to overcome the drawback of conventional visual comparison methods based on vector similarity measures (VSMs). The feature vectors are obtained by analyzing the angular variation of line segments of both standard JRC proﬁles and test proﬁles obtained from three kinds of natural rocks with a sampling interval of 0.5 mm.
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[v1] 2017-06-12 00:55:59
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