Journal ArticleDOI
Estimating the geotechnical properties of heterogeneous rock masses such as flysch
Paul Marinos,Evert Hoek +1 more
TLDR
In this paper, a methodology for estimating the Geological Strength Index and the rock mass properties for flysch formations is presented, which is used for the design of tunnels and slopes in heterogeneous rock masses.Abstract:
The design of tunnels and slopes in heterogeneous rock masses such as flysch presents a major challenge to geologists and engineers. The complex structure of these materials, resulting from their depositional and tectonic history, means that they cannot easily be classified in terms of widely used rock mass classification systems. A methodology for estimating the Geological Strength Index and the rock mass properties for these geological formations is presented in this paper.read more
Citations
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Hoek-brown failure criterion - 2002 edition
TL;DR: The Hoek-Brown failure criterion for rock masses is widely accepted and has been applied in a large number of projects around the world as discussed by the authors, however, there are some uncertainties and inaccuracies that have made the criterion inconvenient to apply and to incorporate into numerical models and limit equilibrium programs.
Gsi: A Geologically Friendly Tool For Rock Mass Strength Estimation
Paul Marinos,Evert Hoek +1 more
TL;DR: In this article, a review of the estimation of rock mass strength properties through the use of GSI is presented and a discussion is given regarding the ranges of the Geological Strength Index for typical rock masses with specific emphasis to heterogeneous rock masses.
Journal ArticleDOI
The Hoek–Brown failure criterion and GSI – 2018 edition
Evert Hoek,Edwin T. Brown +1 more
TL;DR: The Hoek-Brown criterion was introduced in 1980 to provide input for the design of underground excavations in rock as mentioned in this paper, and it has been applied in many projects around the world.
Journal ArticleDOI
The geological strength index: applications and limitations
TL;DR: The geological strength index (GSI) is a system of rock-mass characterization that has been developed in engineering rock mechanics to meet the need for reliable input data, particularly those related to rock mass properties required as inputs into numerical analysis or closed form solutions for designing tunnels, slopes or foundations in rocks as mentioned in this paper.
References
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Journal ArticleDOI
Practical estimates of rock mass strength
Evert Hoek,Edwin T. Brown +1 more
TL;DR: This paper summarises the interpretation of the Hoek-Brown failure criterion which has been found to work best in dealing with practical engineering problems.
Book
Support of underground excavations in hard rock
TL;DR: In this paper, a reference record was created on 2004-09-07, modified on 2016-08-08 and used for the purpose of Dimensionnement Classification and Excavation.
Rock characterization testing and monitoring
TL;DR: The Mecanique des roches Reference Record was created on 2004-09-07, modified on 2016-08-08 as mentioned in this paper, and it was updated in 2016.
Journal ArticleDOI
Applicability of the geological strength index (GSI) classification for very weak and sheared rock masses. The case of the Athens Schist Formation
E. Hoek,Paul Marinos,M. Benissi +2 more
TL;DR: In this article, the applicability of the GSI classification system to these highly heterogeneous and anisotropic metasedimentary rock masses has been discussed and an extension to account for the foliated or laminated weak rocks in the lower range of its applicability is proposed.