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A Typical Design of Soil Nailing System for Stabilizing a Soil Slope: Case Study


  • Universiti Teknologi Petronas, 32610, Seri Iskandar, Perak, Malaysia


Slope failures, is a common issue in construction industry, such that engineers have to avoid its risk on human lives and properties by an appropriate technical design of stabilizing methods. Soil nail is one of such stabilization methods. In this paper, soil-nailing system was studied in terms of inclination, spacing and length to determine the most appropriate values for effective stabilization of soil slope. To find the optimum soil nail system, different soil nail inclination, length and spacing were applied to a hypothetical homogenous soil slope (with inclination of 30o, 40o, 45o, 60o, 70o and 90o) and the Factor of Safety (FOS) was evaluated in each case. To validate the results, the optimum soil nail angle corresponding to a slope of 50o was applied to a case study slope, and the FOS of the case study slope was evaluated as well. The case study slope is located at Cadangan Menjalankan Kerja-Kerja Forensik Di Persiaran Endah, Seputeh Wilayah Persekutuan Kuala Lumpur. Results showed that the soil nails inclination; spacing and length have significant effect on the stability of the soil slope. For soil slope with steepness of 30o, 45o, 60o, 70o, and 90o; the best FOS was found with soil nail inclination (to the horizontal) of 50o, 40o, 20o, 15o, and 10o respectively. The effect of soil nails inclination on the stability of the soil-nailed walls is slight when the degree of inclination of the soil nails varies within 5o–20o to the horizontal. The stability of the slope decreases with the increase of spacing between soil nails. Soil nail length has significant effect on the stability of soil slope with deep-seated slip surface and less effect with shallow slip surface. The bond length behind the slip surface should be enough to allow the nail to use its allowable load.


Landslide, Slope Stability, Soil Nails, Soil, Slope Failure

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  • Chow C, Tan Y. Soil nail design: a Malaysian perspective.In the International Conference on Slopes, Kuala Lumpur, Malaysia; 2006 Aug 7–8.
  • Tei K. A study of soil nailing in sand [Doctor of Philosophy thesis]. UK, University of Oxford; 1993.
  • Byrne R, Cotton D, Porterfield J, Wolschlag C, Ueblacker G.Manual for design and construction monitoring of soil nail walls. In the National Academies of Science, Engineering, Medicine, Transportation Research Board, US; 1996 Nov.p. 468.
  • Tan Y-C, Chow C-M. Slope stabilization using soil nails: design assumptions and construction realities. In MalaysiaJapan Symposium on Geohazards and Geoenvironmental Engineering, Bangi, Malaysia; 2004. p. 1–13.
  • Taenaka S, Ishihama Y, Terada Y, Terada H. Investigation of the bond strength on the surface of a mini-steel pipe with dimples. Japanese Geotechnical Society Special Publication.2015; 1(5):17–22.
  • Zhang G, Cao J, Wang L. Failure behavior and mechanism of slopes reinforced using soil nail wall under various loading conditions. Soils and Foundations. 2014 Dec; 54(6):1175– 87.
  • Cheuk C, Ho K, Lam A. Influence of soil nail orientations on stabilizing mechanisms of loose fill slopes. Canadian Geotechnical Journal. 2013 Dec; 50(12):1236–49.
  • Rotte VM, Viswanadham BV. Influence of nail inclination and facing material type on soil-nailed slopes. Proceedings of the Institution of Civil Engineers-Ground Improvement.2013 May; 166(2):86–107.
  • Chan R. Guide to soil nail design and construction.Geotechnical Engineering, Civil Engineering and Development Department, Hong Kong; 2008 Mar. p. 1–11.
  • Sahoo S, Manna B, Sharma K. Stability analysis of steep nailed slopes under seismic condition using 3-D finite element method. International Journal of Geotechnical Engineering. 2015; 9(5):536–40.
  • Garg A, Garg A, Tai K, Sreedeep S. An integrated SRMmultigene genetic programming approach for prediction of factor of safety of 3-D soil nailed slopes. Engineering Applications of Artificial Intelligence. 2014 Apr; 30:30–40.
  • Hajialilue-Bonab M, Razavi SK. A study of soil-nailed wall behaviour at limit states. Proceedings of the Institution of Civil Engineers-Ground Improvement. 2016 Feb; 169(1):64–76.
  • Lazarte CA, Robinson H, Gómez JE, Baxter A, Cadden A, Berg R. Soil nail walls reference manual. In the National Academies of Science, Engineering, Medicine, Transportation Research Board, US; 2015 Feb. p. 425.
  • Shaw-Shong L. Soil nailing for slope strengthening.Geotechnical Engineering, Gue & Partners Sdn Bhd, Kuala Lumpur, Malaysia; 2005 May 30–31. p. 1–9.
  • Fan C-C, Luo J-H. Numerical study on the optimum layout of soil–nailed slopes. Computers and Geotechnics. 2008 Jul; 35(4):585–99.
  • Krahn J. Stability modeling with SLOPE/W. An engineering methodology, GEO-SLOPE International Ltd, Canada; 2012 Nov. p. 1–235.


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