Abstract
Stresses on ground depend upon regional as well as local geological factors. However, the local geological factors are considered more important in controlling the stresses during tunneling activities. These stresses sometimes get amplified (overstressed condition) due to several factors (geological and/or non-geological), known as stress amplification factor (SAF), and if the same has been plotted along the longitudinal geological profile, it will be variable throughout. Here, an attempt has been made to quantify the SAF and correlate the same with the encountered geology in Kohli Adit Tunnel (KAT) located at lesser Himalayan range of Jammu and Kashmir, India. KAT is at the close vicinity of the Murree Thrust (equivalent to the Main Boundary Thrust). Several collapses and significant deformations due to overstressing occurred during the construction phase. Even there were expected very poor ground condition ahead as emancipated from probing. Therefore, heavier supports have been used than the envisaged support systems. The SAF has been calculated on the basis of differences between the actual and envisaged support systems pressure and other variables. 830 m long KAT has been subdivided into 31 SAF zones, where the values range from 1.05 to 1.25. It has been found that the amplification of stresses was due to factors like, thrust, faults and shear zones, different geomechanical behavior around lithological contacts, low overburden zones and high pore-water pressure zones. Further, it has also been inferred that the combinations of these factors have higher influence on overstressing.
References
Hoek E, Marinos PG (2009) Tunnelling in overstressed rock. In: Vrkljan I (ed) Rock engineering in difficult ground conditions-soft rocks and karst. Taylor & Francis Group, London, pp 49–60
Kumar A, Prakash B, Velapure Y (2008) NATM experience in Pir Panjal rail tunnel. World tunnel congress-underground facilities for better environment and safety-India, pp 1585–1596
Printzl F, Bharadwaj V, Gurenc AH, Garg A (2008) Construction of Pir Panjal Railway Tunnel—NATM experience in the Himalayas. World tunnel congress-underground facilities for better environment and safety-India, pp 1459–1468
Dhang PC (2016) Tunnelling in Lesser Himalaya, Jammu and Kashmir, India with special emphasis on tectonic mélange. J Geol Soc India 88:593–602. https://doi.org/10.1007/s12594-016-0525-3
Dhang PC (2017) Tunnelling in overstressed rock: example from lesser Himalaya of Jammu and Kashmir, India. In: Proceedings of conference on tunnelling in Himalayan Geology, Tunnelling Association of India, Jammu, 11th–13th October, 2017, publication number 340, pp 378–389
Gunzburger Y, Cornet FH (2007) Rheological characterization of a sedimentary formation from a stress profile inversion. Geophys J Int 168:402–418
Zang A, Stephansson O (2010) Stress field of the Earth’s crust. Springer, New York, p 322
Zoback M, Zoback MD, Adams J, Assumpcao M, Bell S, Bergman EA, Blumling P, Brereton NR, Denham D, Ding J, Fuchs K, Gay N, Gregersen S, Gupta HK, Grishiani A, Jacob K, Klein R, Knoll P, Magee M, Mercier JI, Muller BC, Paquin C, Rajendran K, Stephansson O, Suarez G, Suter M, Udias A, Xu ZH, Zhizhin M (1989) Global patterns of tectonic stress. Nature 341:291–298
Sheorey PR (1994) A theory of in-situ stress in isotropic and transversely isotropic rock. Int J Rock Mech Min Sci Geomech 31:23–34
Palmstrom A (1995) RMi—a rock mass characterization system for rock engineering purposes. PhD Thesis, Oslo University, Norway, p 400
Cornet FH (2003) ISRM suggested methods for rock stress estimation—part 1: strategy for rock stress estimation. Int J Rock Mech Min Sci 40:955–1276. https://doi.org/10.1016/j.ijrmms.2003.07.011
Hudson JA, Harrison JP (2005) Engineering rock mechanics: an introduction to the principles, 4th edn. Elsevier, Amsterdam, p 444
Vallejo LIG, Hijazo T (2008) A new method of estimating the ratio between in-situ rock stresses and tectonics based on empirical and probabilistic analyses. Eng Geol 101:185–194
Karakus M, Fowell RJ (2004) An insight into the New Austrian Tunnelling Method (NATM). ROCKMEC′2004-VIIth regional rock mechanics symposium, Sivas, Turkey
Hijazo T, Vallejo LIG (2012) In-situ stress amplification due to geological factors: the case of Pajares tunnels, Spain. Eng Geol 137–138:13–20
Jangpangi BS, Kumar G, Rathore DR, Dutta S (1986) Geology of the “Autochthonous Folded Belt”, Jammu and Kashmir Himalaya with special reference to the Panjal “Thrust”. J Palaeontol Soc India 31:39–51
Geological Survey of India (2000) Anantnag quadrangle Jammu and Kashmir, geological quadrangle map 43O. Geological Survey of India, Calcutta
Geological Survey of India (2005) Geological map of Himalaya, the Director General, Geological Survey of India
Di Pietro JA, Pogue KR (2004) Tectonostratigraphic subdivisions of the Himalaya: a view from the west. Tectonics 23:1–20. https://doi.org/10.1029/2003TC001554
DeCelles PG, Robinson DM, Quade J, Ojha TP, Garzione CN, Copeland P, Upreti BN (2001) Stratigraphy, structure and tectonic evolution of the Himalayan fold-thrust belt in western Nepal. Tectonics 20:487–509. https://doi.org/10.1029/2000TC001226
Catlos EJ, Harrison TM, Kohn MJ, Grove M, Ryerson FJ, Manning CE, Upreti BN (2001) Geochronologic and thermobarometric constraints on the evolution of the Main Central Thrust, central Nepal Himalaya. J Geophys Res 106:16177–16204. https://doi.org/10.1029/2000JB900375
Catlos EJ, Dubey CS, Marston RA, Harrison TM (2007) Geochronologic constraints across the Main Central Thrust shear zone, Bhagirathi River (NW India): implications for Himalayan tectonics. Geol Soc Am 419:135–151. https://doi.org/10.1130/2006.2419(07)
Yin An (2006) Cenozoic tectonic evolution of the Himalayan orogeny as constrained by along-strike variation of structural geometry, exhumation history and foreland sedimentation. Earth Sci Rev 76:1–131. https://doi.org/10.1016/j.earscirev.2005.05.004
Sharma RS (2009) Cratons and fold belts of India. Springer, New York, p 304
Sharma S, Kumar A, Ghangas V (2013) Siesmicity in Jammu and Kashmir region with special reference to Kishtwar. Int J Sci Res Publ 3:1–5
Bilham R (2019) Himalayan earthquakes: a review of historical seismicity and early 21st century slip potential. Geol Soc Lond. https://doi.org/10.1144/SP483.16
Hoek E, Brown ET (1980) Underground excavation in rock. Institution of Mining and Metallurgy, London
Brady BHG, Brown ET (1985) Rock mechanics for underground mining. Allen and Unwin, London
Stille H, Palmstrom A (2008) Ground behavior and rockmass composition in underground excavation. Tunn Undergr Space Technol 23:46–64
Heidbach O, Tingay M, Barth A, Reinecker J, Kurfeß D, Müller B (2009) World stress map, II edition, Helmholtz Centre Potsdam—GFZ German Research Centre for Geosciences, Commission for the Geological Map of the World
Acknowledgements
The author is grateful to the Ircon International Limited and Indian Railway (Northern Railway) for providing the opportunity to work on the geological and geotechnical aspect during the construction of the Kohli Adit Tunnel (KAT), Jammu and Kashmir, India. The author is very much thankful to the people who were engaged in the tunneling work.
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Dhang, P.C. Estimation of Stress Amplification Factor (SAF) and Geological Structures in Tunnel: An Example from Lesser Himalaya, Jammu and Kashmir, India. Indian Geotech J 51, 376–386 (2021). https://doi.org/10.1007/s40098-020-00448-w
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DOI: https://doi.org/10.1007/s40098-020-00448-w