... hybrid tunnelling methods is demonstrated by practical experiences. knowledge management Chainage World Record Barton Reservoir Characterization TBM performance TBM Excavation gallery deceleration Fault Zone TBM case record graphitic schist meta siltstone Turkey excavation tunnel...

... N.R. Barton Nick Barton & Associates, Oslo, Norway C.A. Ryan Gecko Geotechnics Pty Ltd, Cairns, Australia ABSTRACT: The Q-slope method was developed to allow geotechnical engineers to assess the stability of excavated rock slopes in the field and make potential adjustments to slope angles as rock mass...

... strength is more important, according to models of Patton and Barton (the most important classical limit equilibrium models of forces) the participation of the asperity shear strength is lower, vanishing hyperbolically with increasing σ n (Leal-Gomes & Dinis-da-Gama 2014a). At least in matched...

... stable and unsupported slope angles. The new method includes Jr/Ja ratios for both sides of potential wedges, using relative orientation weightings. 1 Introduction The Q-system (Barton et al. 1974 and Barton & Grimstad 2014) for characterizing rock exposures, drill-core, and tunnels under...

... in dimensionless variables like roughness inclination. Furthermore, in accordance with classical models (Patton 1966, Barton & Choubey 1977) two homothetical asperities having the same slope but different amplitudes h have exactly the same strength. In effect, the asperity having larger amplitude is stronger...

... Upstream Oil & Gas reservoir geomechanics pull test Hencher repetition specimen granite Reservoir Characterization Alejano Rock mechanics test result Stimpson discontinuity shear strength friction angle tilt test Barton rock joint rock dust basic friction angle Rock...

...Keynote lectures Rock Engineering and Rock Mechanics: Structures in and on Rock Masses Alejano, Perucho, Olalla & Jiménez (Eds) © 2014 Taylor & Francis Group, London, 978-1-138-00149-7 Shear strength of rock, rock joints and rock masses Problems and some solutions N.R. Barton Nick Barton...

... and crystallization of magma, a product of the volcanic activity, or the hardening and petrification of loose soil materials. For such favorable bedrock conditions, the Tunnelling Quality Index Q (Barton et al. 1974) is a suitable method. The method is widely used in the Fennoscandian countries (Norway, Sweden...

... response of the perfectly closed rock joints under differing normal stress levels was studied empirically and analytically by Patton (1966), Ladanyi & Archambault (1969), Barton & Choubey (1977), Plesha (1987) Saeb & Amadei (1992), Qiu et al. (1993), Grasselli & Egger (2003), Oh (2005...

... from Barton , and GSI from Hoek. 1. Introduction During the realization of the Road Layout and Construction projects of Mungia-Bermeo dual carriageway stretch ( Bizkaia , Basque Country, Spain), a work made for hire for Interbiak (Provincial Council of Bizkaia), Bieniawski RMR index (1989...

.... Introduction Barton et al. (1977) stated this important issue: "No matter how many sophisticated rock mechanics test programs and finite element analyses are performed, design engineers will come back to the basic question: is this bolt spacing, shotcrete thickness, or unsupported span width reasonable...

... calculated from R s . The resulting JRC values served as an input parameter to the original equation of Barton. From the evaluation of the relationship between JRC and Rs a new correlation were identified, which provided a better estimation of the JRC values of the rock types tested. The following...

... is estimated by QTBM method. By using this method the penetration rate is calculated as 8,35 m/hr and the advance rate is calculated as 0,75 m/hr for the 13,77 meter tunnel boring machine driving in chlorite and mica schists. structural geology Barton Reservoir Characterization Upstream Oil & Gas...

... is the excavation support ratio. The maximum height of the chamber in this case study is 10 m and ESR is equal to 1.6 for hydro-electrical structures and power plants. The length of rock bolts in this support system is determined by Barton et al (1980) relation as follow: eb D15.02L (4) Where bL is the required...

... the Joint Roughness Coeffi- cient (JRC) published by N. Barton in 1973 (Tatone & Grasseli, 2010), (Asadollahi & Tonon, 2010) which is a given a value between 0 and 20 depending on the resemble- ance to one of the Barton standard profiles, either by visual estimation or the use of a comb profilometer (Barton...

... in tests were compared against calculated values. 4.2 Peak friction angle Measured data in shear tests were compared against values calculated using the empirical peak shear strength criterion originally proposed by Barton (1973) and Barton and Choubey (1977). Where f is the peak shear strength, n...

... a range of unnecessary difficulties. Reservoir Characterization Barton discontinuity investigation station cavern reservoir geomechanics cavern gneiss Rua Capri axis major metro station collapse borehole saprolite excavation construction Upstream Oil & Gas tunnel differential...

... in Rijeka, Croatia. In A. Viana da Fonseca & P.w. Mayne (ed ISC-2 on Geotechnical and Geophysical Site Character- ization, Proc. ISC-2 on Geotechnical and Geophysical Site Characterization, POI'/O, 19-22 September 2004. Rotterdam: Millpress. Barton, N.R. 2002. Some New Q-Value Correlations toAssist in Site...

... Reservoir Characterization reservoir geomechanics Barton modification Upstream Oil & Gas Pereira correlation strength formula Engineering Geology sandstone Bieniawski foundation deformation modulus determination Serafim deformability classification RMR GPa situ test rock...

... aujourd'hui, un projet de conception base sur un system courant de classification de la roche, tel que I'index Q de Barton, donnerait des mesures de support ainsi: coulage de spray et boulonnage de dessin etendu sur environ la moitie de la longueur du tunnel. Neanmoins, en realite, ce tunnel n'a pas eu de...