Abstract
This paper presents the results of the geological and geotechnical studies of the rock masses along the Meram railway tunnel. The study area consists of limestone which is the base rock and covers a large area between the entrance and exit portals and sandstone which is only observed at the slope of the hill that overlies the tunnel. Results obtained from rock mechanics testing indicate that the limestone along the tunnel route is a moderately strong rock with an average uniaxial compressive strength of 61.88 MPa. Rock mass qualities of the rock units along the tunnel were determined by means of rock mass rating (RMR), Geomechanics Classification (Q) system and New Australian Tunneling Method (NATM). The study shows a very poor-to-fair rock mass conditions, with a rock mass rating (RMR) ranging from 40 to 49 and rock mass quality (Q-system) ranges between 0.69 and 2.52. The limestone was classified according to NATM into two ground categories, which are B2 (friable) and B3 (very friable). Correlations with the RMR, Q-systems and NATM suggested rock bolts and shotcrete as a suitable preliminary support system for the rock mass during excavation.
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References
Barton N, Lien R, Lunde J (1974) Engineering classification of rock masses for the design of tunnel support. Rock Mech 6(4):189–236
Bieniawski ZT (1989) Engineering rock mass classifications: a complete manual for engineers and geologists in mining, civil, and petroleum engineering. Wiley, New York
Eren Y (1993) The geology of the Eldes-Derbent-Tepekoy-Sogutozu (Konya) region, Dissertation, Selcuk University
Goger E, Kiral K (1969) Geology of the Kızıloren region. Mineral Research and Exploration Institute of Turkey (MTA). Report No: 5204. Ankara
Gormus M (1984) Geological investigation in the vicinity of Kızıloren (Konya), Dissertation, Selcuk University
Hoek E, Kaiser K, Bawden F (1995) Support of underground excavations in hard rock. A.A. Balkema, Rotterdam
ISRM (1981) Suggested methods for the quantitative description of discontinuities in rock masses. In: Barton ET (ed) rock characterization, testing and monitoring. Pergamon, London.
Özcan A, Göncüoğlu, MC, Turhan N, Uysal Ş, Şentürk K, ve Işık A (1988) Late Paleozoic evolution of the Kütahya-Bolkardağ belt. METU Journal of Pure and Applied Science 21(1/3):211–220
Rocscience (2016) Dips user’s guide. Rocscience Inc, Toronto
Serafim JL, Pereira JP (1983) Consideration of the geomechanics classification of Bieniawski. Proc Int Symp on Engineering Geology and Underground Constructions, pp. 1133 - 1144
Turan A (2010) Techno–stratigraphy of the area between Alakova and Kavak (Southern Konya). Journal of Faculty of Engineering-Architecture Selcuk University 25(3):25–40
Turkish General Directorate of Highways (2002) List of technical specifications of the underground tunnel excavations with NATM practice. Turkish Ministry of Public Works, Ankara
Acknowledgements
The authors are thankful to Mr. Mehmet Ali Özbudak, Coordinator of ERA Engineering Consultancy Ltd., and the entire ERA geological engineering team for their assistance throughout the project.
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This article is part of the Topical Collection on Geo-Resources-Earth-Environmental Sciences
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Sogut, A.R., Samba, N.J. Engineering geological investigations along the Meram railway tunnel, Konya, Turkey. Arab J Geosci 12, 659 (2019). https://doi.org/10.1007/s12517-019-4839-5
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DOI: https://doi.org/10.1007/s12517-019-4839-5