<p>Rock Quality Designation (RQD), was introduced by Don Deere in the mid-1960s as a means of using diamond core to classify rock for engineering purposes. Subsequently it was incorporated into the Rock Mass Rating and Q-system classification methods which, ...

Classifying the rock mass is widely seen as being the fieldwork required to characterize the rock mass and enable the application of empirical design methods associated with the different classification systems. This paper argues that it is fundamentally important ...

In this study, applicability of the excavatability classification systems in underground excavations is investigated. For this purpose, the entrance portal of the Konak&ouml;n&uuml; (Araklı-Trabzon) tunnel, excavated in volcanic rocks within the scope of Black ...

The impact of earthquakes, due to ground shaking, which affects the whole tunnel length from ovaling of the tunnel cross section, is investigated in this thesis. The influence of rock mass quality Q and the tunnel dimension is also studied. Finally, an approach ...

Current approaches to rockfall hazard and risk mitigation have been dominated by a model in which rockfall is treated as a global slope stability phenomenon which is mainly triggered by precipitation, freeze-thaw, or root wedging. The methods implemented by ...

The paper presents geological and engineering geological characteristics of the flysch in outlined area which is expected to have a lot of similarities with very well defined and investigated flysch deposits in Split.The investigated area belongs to the ...

After 35 years of use throughout the tunnelling world, the RMR and Qclassifications have proved themselves on numerous projects. They stillface misconceptions however, as reflected in recent articles in T&amp;TInternational. Here, Nick Barton, of Nick Barton ...

<p>The objective of this paper is to present a new rock mass classification system which can be appropriate for rock slope stability assessment. In this paper an evaluation model based on combining the Analytic Hierarchy Process (AHP) and the Fuzzy Delphi ...

<p>The squeezing of tunnels is a common phenomenon in poor rock masses under high in situ stress conditions. The critical strain parameter is an indicator that allows the degree of squeezing potential to be quantified. It is defined as the strain level on ...

This is intended to be a reference manual for Geotechnical Engineers. It is principally a data book for the practicing Geotechnical Engineer and Engineering Geologist, which covers: The planning of the site investigation. The classification of soil and rock. ...