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Keywords: Barton
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Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-093
... tunneling related and rock cavern related case records and has been used by engineers across the world for over 40 years (Barton et al. 1974; Barton & Grimstad 2014). Single-shell B+S(fr) tunnel support and reinforcement design assistance, and open stope design, utilizing Q' (the first four parameters...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-187
...Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-03265-1 Fast or slow progress with TBM in ideal or faulted conditions N. Barton Nick Barton & Associates, Oslo, Norway N. Bilgin Mining Engineering Department...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-078
... 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 n (Leal-Gomes & Dinis-da-Gama 2014a). At least in matched discontinuities under...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-026
... 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...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-013
... 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...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-028
... the mechanical behavior of these natural materials. Discontinuities found in real rock masses are typically irregularly rough. The shear behavior of these discontinuities has been one of the most rele- vant topics of research in rock mechanics. Barton and co-workers (Barton 1973, 1976, Barton & Choubey 1977...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-001
...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...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-071
... 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...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-101
... 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...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-069
... 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...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-106
.... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-093
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-032
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-059
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-116
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-047
... 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...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-003
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-005
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2002, November 25–27, 2002
Paper Number: ISRM-EUROCK-2002-034
.... After Bieniawski' s (1978) first proposal, . erafim & Pereira and Barton (using data from Rocha, 1964) gave more specific formulations In a L'(19 Isbon Symposium (1983). Afterwards Boyd (1993), Barton (1995), Hoek & Brown q 97) and Hoek, Carranza-Torres & Corkum (2002) have all, presented contributions...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-102
... 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...

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