- The Hoek–Brown failure criterion and GSI – 2018 edition
- E. Hoek ; E.T. Brown
- Book Title / Journal: Journal of Rock Mechanics and Geotechnical Engineering
- Year: 2019 , Volume: 11
- Rock Mechanics
- Keywords: Hoek-Brown criterion ; Geological strength index (GSI) ; Rock mass strength ; Uniaxial compressive strength (UCS) ; tension cut-off ; Rock mass deformation modulus
- Abstract
The Hoek–Brown criterion was introduced in 1980 to provide input for the design of underground excavations in rock. The criterion now incorporates both intact rock and discontinuities, such as joints, characterized by the geological strength index (GSI), into a system designed to estimate the mechanical behaviour of typical rock masses encountered in tunnels, slopes and foundations. The strength and deformation properties of intact rock, derived from laboratory tests, are reduced based on the properties of discontinuities in the rock mass. The nonlinear Hoek–Brown criterion for rock masses is widely accepted and has been applied in many projects around the world. While, in general, it has been found to provide satisfactory estimates, there are several questions on the limits of its applicability and on the inaccuracies related to the quality of the input data. This paper introduces relatively few fundamental changes, but it does discuss many of the issues of utilization and presents case histories to demonstrate practical applications of the criterion and the GSI system. PDF |
- Fracture initiation and propagation in intact rock – A review
- E. Hoek ; C.D. Martin
- Book Title / Journal: Journal of Rock Mechanics and Geotechnical Engineering
- Year: 2014 , Volume: 6
- Rock Mechanics
- Keywords: Tensile failure ; Crack propagation ; Griffith theory ; Hoek–Brown criterion ; Tension cutoff ; Crack coalescence ; Numerical models
- Abstract
The initiation and propagation of failure in intact rock are a matter of fundamental importance in rock engineering. At low confining pressures, tensile fracturing initiates in samples at 40%–60% of the uniaxial compressive strength and as loading continues, and these tensile fractures increase in density, ultimately coalescing and leading to strain localization and macro-scale shear failure of the samples. The Griffith theory of brittle failure provides a simplified model and a useful basis for discussion of this process. The Hoek–Brown failure criterion provides an acceptable estimate of the peak strength for shear failure but a cutoff has been added for tensile conditions. However, neither of these criteria adequately explains the progressive coalition of tensile cracks and the final shearing of the specimens at higher confining stresses. Grain-based numerical models, in which the grain size distributions as well as the physical properties of the component grains of the rock are incorporated, have proved to be very useful in studying these more complex fracture processes. PDF |
- Quantification of the Geological Strength Index Chart
- E. Hoek ; T.G. Carter ; M.S. Diederichs
- Year: 2013
- Engineering Geology
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- Alternative Ground Control Strategies in Underground Construction 2012
- E. Hoek
Keynote address presented at the International Symposium on “Practices and Trends for Financing and Contracting Tunnels and Underground Works”, Athens, Greece, 22-23 March 2012. - Year: 2012
- Underground Structures ; Tunneling
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- Fundamentals of Slope Design 2009
- E. Hoek
Fundamentals of Slope Design. Keynote address at Slope Stability 2009, Santiago, Chile, 9 - 11 November 2009. - Year: 2009
- Slope Stability
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- Tunnelling in Overstressed Rock 2009
- E. Hoek ; P.G. Marinos
Keynote address presented at EUROCK2009, Dubrovnik, Croatia, 29-31 October 2009. - Year: 2009
- Tunneling in Rock
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- Overcoming Squeezing in the Yacambú-Quibor Tunnel, Venezuela
- E. Hoek ; R. Guevara
- Year: 2009
- Tunneling
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- The 2008 Kersten Lecture: Integration of geotechnical and structural design in tunnelling
- E. Hoek ; C. Carranza-Torres ; Mark Stephen Diederichs ; B. Corkum
- Proceedings University of Minnesota 56th Annual Geotechnical Engineering Conference. Minneapolis, 29 February 2008, 1-53
- Year: 2008
- Tunneling ; Underground Structures
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- 2008 Kersten Lecture
- E. Hoek ; C. Carranza-Torres ; M.S. Diederichs ; B. Corkum
Integration of geotechnical and structural design in tunnelling. Proceedings University of Minnesota 56th Annual Geotechnical Engineering Conference. Minneapolis, 29 February 2008, 1-53 - Year: 2008
- Underground Structures ; Tunneling
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- Practical Rock Engineering. New Edition
- E. Hoek
- Year: 2007
- Rock Mechanics
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- A Brief History of the Development of the Hoek-Brown Failure Criterion. Soils and Rocks, No. 2
- E. Hoek ; P. Marinos
- Year: 2007
- Rock Mechanics ; Rock Mass Characterization
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- The construction of the Egnatia Highway through unstable slopes in northern Greece
- E. Hoek ; P. Marinos
Proceedings of the XI Conference on Rock Mechanics, Turin, November 2006 - Year: 2006
- Rock Mechanics
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- Variability of the engineering properties of rock masses quantified by the geological strength index: the case of ophiolites with special emphasis on tunnelling
- E. Hoek ; P. Marinos ; V. Marinos
Bulletin of Engineering Geology and the Environment , 65/2, pp. 129-142 - Year: 2006
- Rock Mechanics
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- Empirical estimation of rock mass modulus
- Mark Stephen Diederichs ; E. Hoek
International Journal of Rock Mechanics and Mining Sciences, 43, pp. 203?215. Elsevier Ltd - Year: 2006
- Rock Mechanics
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- Greece's Egnatia Highway Tunnels
- E. Hoek ; P. Marinos ; N. Kazilis ; G. Angistalis ; N. Rahaniotis ; V. Marinos
Tunnels & Tunnelling International, September 2006, 32-35 - Year: 2006
- Tunneling ; Underground Structures
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