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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/18959

Title: Quantitative Characterization of Natural Rock Discontinuity Roughness In-situ and in the Laboratory
Authors: Tatone, Bryan Stanley Anthony
Advisor: Grasselli, Giovanni
Department: Civil Engineering
Keywords: Discontinuity roughness
Rock engineering
Scale effects
Rock mechanics
Discontinuity shear strength
Issue Date: 16-Feb-2010
Abstract: The surface roughness of unfilled rock discontinuities has a major influence on the hydro-mechanical behaviour of discontinuous rock masses. Although it is widely recognized that surface roughness is comprised of large-scale (waviness) and small-scale (unevenness) components, most investigations of surface roughness have been restricted to small fracture surfaces (<1m2). Hence, the large-scale components of roughness are often neglected. Furthermore, these investigations typically define roughness using two-dimensional profiles rather than three-dimensional surfaces, which can lead to biased estimates of roughness. These limitations have led to some contradictory findings regarding roughness scale effects. This thesis aims to resolve some of these issues. The main findings indicate that discontinuity roughness increases as a function of the sampling window size contrary to what is commonly assumed. More importantly, it is shown that the estimated roughness significantly decreases as the resolution of surface measurements decrease, which could lead to the under estimations of roughness and, consequently, discontinuity shear strength.
URI: http://hdl.handle.net/1807/18959
Appears in Collections:Master
Department of Civil Engineering - Master theses

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