Abstract
This paper summarizes the results of probe drilling carried out ahead of TBMs in two difficult tunneling projects in Turkey. The tunnels have completely different geological characteristics which necessitated two different methods of data analysis. Melen Water Tunnel was excavated under Istanbul Bosphorus within sedimentary rocks which are cut frequently by andesitic dykes, fracturing the surrounding rocks and creating a potential risk for water ingress into the tunnel. At the beginning of Melen Project, pioneering probe drillings with petrographic analysis and strength tests were performed on samples collected from TBM muck. This analysis allowed identifying some critical normalized probe drilling rate values for predicting potential weak zones created by andesitic dykes. These studies gave a sound basis for further interpretation of TBM and geologic data for the same tunnel. The second set of probe drilling analysis was from Kargi Tunnel. The North Anatolian Fault highly affected the tunnel excavation by fractured rock formations. Although the change in normalized probe drilling data was a good indicator of fractured zones, the diversity of rock formations made it difficult to interpret the data.
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References
AFTES (2014) Forward probing ahead of tunnel boring machines. Tunnels espace Souterrain 2014:132–164
Anagnostou G, Ozdemir L, Bilgin N (2008) Greater Melen Project—Bosphorus Water Tunnel Report on the site visit of 27th June 2008 and on the first results of drilling data analysis, p 30
Anagnostou G (2010) Some rock mechanics aspects of subaqueous tunnels. Rock engineering in difficult ground conditions—soft rocks and Kars. In: Vrkljan (ed) Taylor & Francis Group, London, ISBN 978-0-415-80481-3, p 12
Bakir A, Eris I, Daglioglu S (2011) Probe drilling in Bosphorus Tunnel (SP-7). In: Proceedings for Atilla Yalcin Symposium, İstanbul, ITU, pp 72–82
Bakir A, Eris I, Daglioglu S (2012) Interrelationships between TBM performance and probe drill data in Melen Water Tunnel (SP-7) in Istanbul. In: Proceedings of geomechanic, symposium for Mahir Vardar, Istanbul, ITU, pp 91–103
Barla G, Pelizza S (2000) TBM tunnelling in difficult ground conditions. Geoeng, Melbourne, p 21
Bilgin N, Copur H, Balci C (2014) Mechanical excavation in mining and civil industries, 1st edn. CRC Press, New York
De Graaf PJH, Bell FG (1997) The delivery tunnel North, Lesotho highlands water project. Geotech Geol Eng 15:95–120
Duke SK, Arabshani J (2007) Evaluating ground conditions ahead of a TBM using probe drill data. In: Rapid excavation and tunneling conference (RETC) Proceedings, pp 430–441
Flury S, Priller A (2009) Successful penetration of the Piora Basic in the Faido Part-Section. Tunnel 4:15–18
Henke A (2005) Experience from the ground probing in the Gothard-Base Tunnel and their applicability in the Gibraltar Strait Crossing. IV UN-ITA Workshop Gibraltar Strait Crossing, Madrid January 20, p 20
Home L (2014a) Case studies on mechanized rock tunneling. In: Proceeding of world tunneling congress, tunnels for energy, 9–10 May, Brazil, p 12
Home L (2014b) The Kargi challenge, a study of TBM boring vs. conventional excavation. In: Third short course organized by Turkish Tunnelling Society, 28 August Istanbul, p 22
Ozgorus Z, Okay IA (2005) Orientation of the andesitic dykes in the Istanbul Region: an approach to the cretaceous stress distribution. Miner Res Exp Bull 130:17–27
Peila D, Pelizza S (2009) Ground probing and treatments in rock TBM tunnel to overcome limiting conditions. J Min Sci 45(6):602–619
Schunnesson H (1996) RQD Predictions based on drill performance parameters. Tunn Undergr Sp Technol 11(3):345–351
Schunnesson H (1998) Rock Characterization using percussive drilling. Int J Rock Mech Min Sci 35(6):711–725
Steele DJ, Wu KK, Ishii M, Mackay AD, Kameyama K (2014) The use of advanced percussive drilling techniques to predict ground conditions ahead of sub-surface excavations, In: Underground Singapore, 25–26 September, organized by TUCSS. Tunnelling and Underground Society, Singapore, p 12
Tuncdemir H, Bilgin N, Copur H, Balci C (2008) Control of rock cutting efficiency by muck size. Int J Rock Mech Min Sci 45:278–288
Yurt M, Ozturk A, Arslan Z, Nuhoglu C, Oystein L, Erdogan E, Atlar B, Palakcı Y, Bilgin N (2014) Factors affecting the performance of a double shield TBM in a very complex geology in Kargi Turkey. In: Proceedings world tunnel congress 2014—tunnels for a better Life. Foz do Iguacu, Brazil, p 12
Acknowledgments
The authors are grateful to the representatives of Mosmetrostoy, Gulermak and Statkraft Companies for their valuable help and sharing their experiences during these investigations. Also the authors are most obliged to Prof. Dr. G. Anagnostou and Prof. Dr. L. Ozdemir for their valuable contributions during expertise studies, Melih Algan for geologic interpretation in Melen Project and finally to Prof. Dr. Hanifi Copur for reading the manuscript and for his valuable comments.
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Bilgin, N., Ates, U. Probe Drilling Ahead of Two TBMs in Difficult Ground Conditions in Turkey. Rock Mech Rock Eng 49, 2763–2772 (2016). https://doi.org/10.1007/s00603-016-0937-9
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DOI: https://doi.org/10.1007/s00603-016-0937-9