Paul Marinos

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.

TL;DR: 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.

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.

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.