Scientific Quarterly Journal of Iranian Association of Engineering Geology

Scientific Quarterly Journal of Iranian Association of Engineering Geology

Stability analysis of the support system for Sardasht long tunnel using convergence -confinement and Hoek-Brown criteria

Document Type : Original Article

Authors
Hasan Bakhshndeh Amieh 1
Saeed Taei Semiromi 2
Morteza Rahimi 3
Hakimeh Pirmoradian 4
1 Mining Engineering Department, Kashn University, Kashan-Iran
2 Sepasad Engineering Company, Tehran - Iran
3 Ph.D. Student of Rock Mechanic, Amirkabir University of Technology, Tehran - Iran
4 M.Sc. student, Dep. of Mining Engineering., University of Kashan, Kashan – Iran
Abstract
Stability analysis of the support systems in tunnels is an important designing issue. Convergence-confinement method is used to estimate the applied load to the installed support system. The behavior of encountered jointed rockmass (which reduces the strength) could be studied, having established the degree of their convergence. Carranza-Torres and Fairhurst having used the latest version of Hoek-Brown correlation presented an analytical method to determine the relationship between factors describing the rockmass strength and mechanical reflections concerning the cylindrical underground spaces. In this article, using similar approach, the ground reaction curve was obtained for Sardasht long tunnel. Having compared the results with those prepared from a numerical method using FLAC 3D, it was clear that the above approach could be used for this tunnel where a safety factor of 3.14 was obtained for the stability of the segmented lining in the face of the applied loads.
Keywords
Sardasht long tunnel
Convergence-Confinement
Hoek-Brown
Carranza-Torres and Fairhurst
Subjects
بخشنده، ح.، طایی، س.، رحیمی، م.، 1391. تحلیل پایداری شیروانی‌های مشرف به نیروگاه سد سردشت با در نظر گرفتن اثر کلیواژ توده­سنگ. مجله انجمن زمین‌شناسی مهندسی ایران، جلد پنجم، شماره 1 و 2، ص ص. 26-17.
شرکت مهندسی مشاور سپاسد – فراب، خرداد 1390، گزارش زمین‌شناسی مهندسی مطالعات مرحله دوم.
شرکت مهندسی مشاور سپاسد – فراب، مرداد 1390، گزارش بازنگری مرحله دوم پارامترهای ژئومکانیکی توده­سنگ.
طاحونی، ش، 1383. طراحی سازه‌های بتن مسلح. تهران: انتشارات دهخدا. چاپ اول، ص. 328- 321.
فرخ، الف.، 1386. قطعات بتنی پیش ساخته. تهران: انتشارات جهاد دانشگاهی صنعتی امیرکبیر، چاپ اول.
Atkinson, J., 1993. An introduction to the mechanics of soils and foundations. Mc Graw – Hill Book Company.
Brady, B.G.H., Brown, E.T., 2004. Rock mechanics for underground mining: Springer Science, Business Media, Inc, United States of America, 645p.
Carranza-Torres, C.,  Fairhurst, C., 2001. Analysis of tunnel support requirements using the convergence-confinement method and the Hoek-Brown rock failure criterion. Proceedings of the International Conference on Geotechnical and Geological Engineering, Melbourne, pp.65-75.
Carranza-Torres, C., Fairehurst, C., 2000. Application of the Convergence-Confinement Method of Tunnel Design to Rock Masses That Satisfy the Hoek-Brown Failure Criterion. Tunnelling and Underground Space Technology , 15: 187-213.
Carranza-Torres, C., Fairhurst, C., 1999. The elasto-plastic response of underground excavations in rock masses that satisfy the Hoek-Brown failure criterion. International Journal of Rock Mechanics and Mining Sciences , 36: 777-809.
Fairhurst, C., Carranza-Torres, C., 2002. Closing the circle. In J. Labuz and J. Bentler (Eds.),. Proceedings of the 50 th Annual. Geotechnical Engineering Conference. St. Paul, Minnesota. February 22. University of Minnesota, 65p.
Hoek, E., Carranza-Torres, C., Corkum, B., 2002. Hoek-Brown failure criterion – 2002 Edition. Proc. NARMS-TAC Conference, Toronto, vol 1: 267-273.
Hoek, E., Diederichs, M.S., 2006. Empirical estimation of rock mass modulus. International Journal of Rock Mechanics and mining Sciences, 43: 203-215.
Londe, P., 1988. Discussion on the Determination of the Shear Stress Failure in Rock Masses. ASCEJ. Geotechnical Engineering Division, 14(3): 374-376.
Sakurai, S., 1999. Lessons Learned from Field Measurements in Tunnelling. Tunnelling and Underground Space Technology, 12: 453-460.
Scientific Quarterly Journal of Iranian Association of Engineering Geology
Volume 7, Number 1 & 2
September 2014
Pages 83-92

  • Receive Date 26 August 2012
  • Revise Date 20 March 2014
  • Accept Date 02 September 2014