Volume 1, Issue 2 — Year 2024 — Article e100021

ISSN (Online): 3115-8129 Biannually

Rock Slope Stability Analysis based on New Qslope method for Semirom Region in Iran

Article Type: Case Study
Pages: e100021
DOI: https://doi.org/10.22034/CGEL.1.2.e100021

Authors
Affiliations
  1. Department of Engineering, Raghib Isfahani Institute of Higher Education, Isfahan 7998981691, Iran
  2. Department of Engineering, Raghib Isfahani Institute of Higher Education, Isfahan 7998981691, Iran
Corresponding author
Email: Alireza.m.1990@gmail.com
Received: 22 August 2024 / Accepted: 16 October 2024 / Published: 26 December 2024
Abstract

Rock slope stability is a crucial component of geotechnical engineering, aimed at ensuring the safety and integrity of both natural and artificial slopes within rock formations. This study aims to classify rock slopes based on stability using the Qslope method, an approach originally developed by Bar and Barton in 2017 and later modified by Azarafza et al. in 2020 to accommodate data from Iran. For this research, 12 jointed rock slopes in the Semirom region of Iran were selected as case studies. The analysis revealed that most of these slopes are in stable or uncertain conditions, while two were identified as unstable. The findings underscore the utility of the Qslope method as a fast and efficient tool for assessing rock slope stability. This method offers practical advantages for geotechnical engineers, as it streamlines the evaluation process, especially in regions where geological data may be limited or difficult to obtain. Ultimately, the study contributes valuable insights into slope stability management in Iran, while also confirming the broader applicability of the Qslope method to various geographical contexts.

Keywords

Rock slope, Slope stability, rock mechanics, Qslope, Geology

Data availability statement

The data supporting the findings of this study are available within article. No publicly archived dataset was generated.

Funding

This research received no external funding.

Highlights
  • Qslope method assesses rock slope stability
  • Most slopes stable, few unstable cases
  • Method is fast and effective for geotechnical analysis
References
  1. Azarafza M., Akgün H., Asghari-Kaljahi E. (2017a). Assessment of rock slope stability by mass rating (SMR): A case study for the gas flare site in Assalouyeh, South of Iran. Geomechanics and Engineering, 13(4), 571-584. https://doi.org/10.12989/gae.2017.13.4.571.
  2. Azarafza M., Akgün H., Ghazifard A., Asghari-Kaljahi E., Rahnamarad J., Derakhshani R. (2021). Discontinuous rock slope stability analysis by limit equilibrium approaches–a review. International Journal of Digital Earth, 14(12), 1918-1941. https://doi.org/10.1080/17538947.2021.1988163.
  3. Azarafza M., Asghari-Kaljahi E., Akgün H. (2017b). Assessment of discontinuous rock slope stability with block theory and numerical modeling: a case study for the South Pars Gas Complex, Assalouyeh, Iran. Environmental Earth Sciences, 76(11), 397. https://doi.org/10.1007/s12665-017-6711-9.
  4. Azarafza M., Bonab M.H., Derakhshani R. (2022a). A novel empirical classification method for weak rock slope stability analysis. Scientific Reports, 12(1), 14744. https://doi.org/10.1038/s41598-022-19246-w.
  5. Azarafza M., Koçkar M.K., Zhu, H.H. (2022b). Correlations of SMR-Qslope data in stability classification of discontinuous rock slope: a modified relationship considering the iranian data. Geotechnical and Geological Engineering, 40(4), 1751-1764. https://doi.org/10.1007/s10706-021-01991-w.
  6. Azarafza M., Nanehkaran Y.A., Rajabion L., Akgün H., Rahnamarad J., Derakhshani R., Raoof A. (2020). Application of the modified Q-slope classification system for sedimentary rock slope stability assessment in Iran. Engineering Geology, 264, 105349.https://doi.org/10.1016/j.enggeo.2019.105349.
  7. Bar N., Barton N. (2017). The Q-Slope Method for Rock Slope Engineering. Rock Mechanics and Rock Engineering, 50, 3307-3322. https://doi.org/10.1007/s00603-017-1305-0.
  8. Barton N., Bar N. (2015). Introducing the Q-slope method and its intended use within civil and mining engineering projects. In: Proceedings of the ISRM Regional Symposium (Eurock 2015) and 64th Geomechanics Colloquium, Salzburg, Austria.
  9. Barton N., Grimstad E. (2014). Forty years with the Q-system in Norway and abroad. Fjellsprengningsteknikk, NFF, Oslo, Norway.
  10. Barton N., Lien R., Lunde J. (1974). Engineering classification of rock masses for the design of tunnel support. Rock Mechanics, 6, 189-236.
  11. Bieniawski Z.T. (1973). Engineering classification of jointed rock masses. Journal of the South African Institution of Civil Engineering, 15, 335-344.
  12. Bieniawski Z.T. (1989). Engineering rock mass classifications: a complete manual for engineers and geologists in mining, civil, and petroleum engineering. Wiley, New York, USA.
  13. Cecil O.S. (1970). Correlation of rock bolt-Shotcrete support and rock quality parameters in Scandinavian tunnels. Ph.D. Dissertation, University of Illinois, Illinois, USA.
  14. Deere D.U., Deere D.W. (1989). Rock quality designation (RQD) after twenty years. Geotechnical Laboratory Engineer Research and Development Center, USACE, Report WES/CR/GL-89-1, Mississippi, USA.
  15. Deere D.U., Peck R.B., Parker H., Monsees J.E., Schmidt B. (1970). Design of tunnel support systems. Highway Research Record, 339, 26-33.
  16. Hajehforoshnia S., Karam A. (2022). Evaluation and zoning of geo-ecotourism potential of Semirom city. Journal of RS and GIS for Natural Resources, 13(2), 107-129. https://doi.org/10.30495/girs.2022.684201.
  17. Hamedanian M.K., Vaziri S.H., Shakarami M.A., Arian M., Arzani N. (2017). Lithostratigraphy and microbiostratigraphy of Gadvan and Darian formations in south Semirom, east of Zagros basin, south-Central Iran. Open Journal of Geology, 7(02), 119. https://doi.org/10.4236/ojg.2017.72008.
  18. Hamedanian M.K., Vaziri S.H., Shakarami M.A., Arian M., Arzani N. (2016). Microfacies, sedimentary environment and sequence stratigraphy of Gadvan and Darian Formations in the Zagros Basin, South of Semirom, Iran. Open Journal of Geology, 6(09), 1169. https://doi.org/10.4236/ojg.2016.69086.
  19. Hashemi M., Babaahmadi A., Ajalloeian R., Safaei H., Rahnama M.R. (2009). Investigation on causes of the Siruyeh landslide, West Semirom (Iran). Landslides, 6, 101-109. https://doi.org/10.1007/s10346-009-0151-x.
  20. Hudson J.A., Harrison J.P. (1997). Engineering Rock Mechanics- an Introduction to the Principles. Elsevier Science, Amsterdam, Netherlands.
  21. Hussian S., Mohammad N., Ur Rehman Z., Khan N.M., Shahzada K., Ali S., Sherin S. (2020). Review of the geological strength index (GSI) as an empirical classification and rock mass property estimation tool: Origination, modifications, applications, and limitations. Advances in Civil Engineering, 2020(1), 6471837. https://doi.org/10.1155/2020/6471837.
  22. Kainthola A., Verma D., Thareja R., Singh T.N. (2013). A review on numerical slope stability analysis. International Journal of Science, Engineering and Technology Research, 2(6), 1315-1320.
  23. Kouhdaragh M., Azarafza M., Derakhshani R. (2022). A Qslope-based empirical method to stability assessment of mountain rock slopes in multiple faults zone: A case for North of Tabriz. MethodsX, 9, 101718. https://doi.org/10.1016/j.mex.2022.101718.
  24. Lauffer H. (1958). Gebirgsklassi fizierung für den stollenbau. Geologie und Bauwesen, 74: 46-51.
  25. Marinos P., Hoek E. (2000). A geologically friendly tool for rock mass strength estimation. In: Proceedings of the International Conference on Geotechnical & Geological Engineering (GeoEng2000), Melbourne, Australia.
  26. Marinos V., Marinos P., Hoek, E. (2005). The geological strength index: applications and limitations. Bulletin of Engineering Geology and the Environment, 64(1), 55-65. https://doi.org/10.1007/s10064-004-0270-5.
  27. Moghadam M.R., Padyab M. (2010). Investigating the role of Geological Formation on mass movement occurrence Case study: Bar watershed. In: Proceedings of the 1st International Applied Geological Congress, Mashad, Iran.
  28. Nikoobakht S., Azarafza M. (2016). Stability analysis and numerical modelling of toppling failure of discontinuous rock slope (A case study). Journal of Geotechnical Geology, 12(2), 169-178.
  29. Onsel I.E., Ozturk C.A., Ozkan M., Nasuf S.E. (2011). Software for RQD and Rock Mass Evaluation. In: Proceedings of the ARMA US Rock Mechanics/Geomechanics Symposium, San Francisco, California, pp. ARMA-11.
  30. Palmstrom A. (2005). Measurements of and Correlations between Block Size and Rock Quality Designation (RQD). Tunnelling and Underground Space Technology, 20, 362-377. https://doi.org/10.1016/j.tust.2005.01.005.
  31. Palmstrom A., Broch E. (2006). Use and misuse of rock mass classification systems with particular reference to the Q-system. Tunnelling and Underground Space Technology, 21(6), 575-593. https://doi.org/10.1016/j.tust.2005.10.005.
  32. Pantelidis L. (2009). Rock slope stability assessment through rock mass classification systems. International Journal of Rock Mechanics and Mining Sciences, 46(2), 315-325. https://doi.org/10.1016/j.ijrmms.2008.06.003.
  33. Ritter W. (1879). Die statik der tunnelgewölbe. Springer, Berlin-Heidelberg, Germany.
  34. Romana M. (1993). A geomechanical classification for slopes: Slope mass rating in comprehensive rock engineering, principles–practice and projects. J.A. Hudson (Edn.), Pergamon, Chapter 3, 575-600.
  35. Salmi E.F., Hosseinzadeh S. (2015). Slope stability assessment using both empirical and numerical methods: a case study. Bulletin of Engineering Geology and the Environment, 74, 13-25. https://doi.org/10.1007/s10064-013-0565-5.
  36. Şen Z., Eissa E.A. (1991). Volumetric rock quality designation. Journal of Geotechnical Engineering, 117(9), 1331-1346. https://doi.org/10.1061/(ASCE)0733-9410(1991)117:9(1331).
  37. Singh B., Goel R.K. (2011). Engineering Rock Mass Classification: Tunneling, Foundations, and Landslides. Elsevier Science, Amsterdam, Netherlands.
  38. Sonmez H., Ulusay R. (1999). Modifications to the geological strength index (GSI) and their applicability to stability of slopes. International Journal of Rock Mechanics and Mining Sciences, 36(6), 743-760. https://doi.org/10.1016/S0148-9062(99)00043-1.
  39. Terzaghi K. (1946). Rock defects and loads on tunnel supports. Harvard University press, Massachusetts, USA.
  40. Ullah S., Khan M.U., Rehman G. (2020). A brief review of the slope stability analysis methods. Geological Behavior, 4(2), 73-77.
  41. Yavari H., Pahlavani P., Bigdeli B. (2019). Landslide hazard mapping using a radial basis function neural network model: a case study in Semirom, Isfahan, Iran. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 42, 1085-1090. https://doi.org/10.5194/isprs-archives-XLII-4-W18-1085-2019.
How to cite
Moharami, A., & Azadi, M. (2024). Rock Slope Stability Analysis based on New Qslope method for Semirom Region in Iran. Civil and Geoengineering Letters, 1(2), e100021. https://doi.org/10.22034/CGEL.1.2.e100021
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