Geotechnical investigations of Işikli Tunnel alternative alignments, Turkey

  • Özgüler E. 
  • Ertunc A. 
  • Taner O. 


The regional geology of the alternative tunnel alignments of Işikli Tunnel and its decisive influence on alignment of different alternative waterways is presented. A solution with optimum use and possible most favorable tunneling conditions were established. A procedure including rock mass classification and subsequent study of alternatives was used. Results are given for the NGI (Q), CSIR (RMR) and RSR systems for rock units as well as the signification and support recommendations for the encountered rock types.


Rock Unit Longitudinal Profile Weak Rock North Anatolian Fault Tunnel Excavation 

Étude géotechnique des différents tracés possibles pour le Tunnel d'Işkli, Turquie


L'article présente la géologie régionale du Tunnel d'Işikli, en Turquie, et son influence sur les tracés possibles. On a mis au point une solution combinant une utilisation optimale et des conditions de foration des tunnels les plus favorables possibles. La méthode utilisée inclut une classification des massifs rocheux puis une étude des variantes. Les résultats sont présentés dans le système NGI (Q), CSIR (RMR) et RSR pour des ensembles rocheux et complétés par des recommandations pour chaque type de roche traversée.


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  1. BARTON N., LIEN R., LUNDE J.: Engineering Classification of Rock Masses For Tunnel Support, Rock Mechanics, 6, 4, 1836236, Springer-Verlag, 1974.CrossRefGoogle Scholar
  2. BIENIAWSKI Z.T.: The Geomechanics Classification in Rock Engineering Applications. Proc. 4th Int. Cong. Mech., ISRM, Montreux, 2, 41–48, 1979.Google Scholar
  3. BIENIAWSKI Z.T.: Engineering Rock Mass Classification, A Complete Manuel For Engineers And Geologists in Minining, Civil and Petroleum Engineering, John Wiley and Sons, New York, 251, 1989.Google Scholar
  4. I.S.R.M.: Basic Geotechnical Description of Rock Masses, Int. 1, Rock Mec. Min. Sci. and Geomech. Abstr., 18, 85–110, Great Britain, 1981.Google Scholar
  5. KOVARI K.: Işikli Tunnel Feasibility Report, DST Report, Ankara, 1991.Google Scholar
  6. KÖKÜÖZ E.: Işikli Tuneli Fotojeoloji Raporu, DST Report (In Turkish), Ankara, 1986.Google Scholar
  7. ÖZGÜLER E.: Ankara Su Temin Projesi Gerede-Cmlidere Derivasyonu Işikli Tuneli Alternatif Güzergahlari Jeoteknik Incelemesi, Ph.D. Thesis, Adana, 1994.Google Scholar
  8. TANER O.: Ankara Su Temin Projesi Gerede Sistemi Işikli Tuneli Alternatif Güzergahlari Mühendislik Jeolojisi Raporu, DST Report (In Turkish), Ankara, 1993.Google Scholar
  9. ÜNLÜ M.R.: Kazanlar-Peçenek Alaninin Jeolojisi ve Jeoternal Olanaklarina Dair Rapor, MTA Report (In Turkish), 5775, Ankara, 1973.Google Scholar
  10. WICKHAM G.E., TIEDEMANN H.R. & SKINNER E.H., 1972: Support Determinations Based on Geological Predictions.—1st North American Rapid Excavation and Tunneling Conference, p.oc. 1, p. 43–64.Google Scholar

Copyright information

© International Association of Engineering Geology 1996

Authors and Affiliations

  • Özgüler E. 
    • 1
  • Ertunc A. 
    • 2
  • Taner O. 
    • 3
  1. 1.General Directorate of State Hydraulic WorksAnkaraTurkey
  2. 2.Faculty of EngineeringUniversity of ÇukurovaAdanaTurkey
  3. 3.AnkaraTurkey

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