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Shear Strength Reduction Analysis of Slope by Numerical Modelling Based on Finite Element Method

Received: 20 May 2023     Accepted: 26 June 2023     Published: 11 July 2023
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Abstract

The stability of the slope is the crucial factor in geotechnical engineering, particularly when the slopes are composed of soils. The purpose of this research is to analyze the shear strength reduction of glacial till slope using phase 2 software. Where, conclusive analysis is based on two methods, Limit equilibrium and the Mohr-Colomb criterion Finite Element (FE) Shear Strength Reduction (SSR). The methodology embodied the major laboratory test results such as Atterberg limits, Direct Shear Strength test, unconfined compression strength. The experimental results were than used in phase 2 software, where 2D plane strain model of the slope was created. The impact of modifications in shear strength parameters on the factor of safety is then examined. The analysis showed that the glacial till slope experienced a significant reduction in strength, with the Limit Equilibrium method FOS ranging from 0.94 to 1.54, while Mohr’s criterion Finite Elements Shear Strength Reduction ranged from 0.31 to 0.61. The analysis results, in conclusion, the shear strength reduction of slope is reliable and efficient for determining the stability of slopes. The use of both aforementioned methods provides accurate and consistent results that can aid in making effective engineering decisions.

Published in American Journal of Science, Engineering and Technology (Volume 8, Issue 3)
DOI 10.11648/j.ajset.20230803.11
Page(s) 125-132
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2023. Published by Science Publishing Group

Keywords

Limit Equilibrium Method, Strength Reduction Method, Stability Analysis, Factor of Safety, Slope

References
[1] Naeij, Morteza & ghasemi, Hussein & Ghafarian, S. Danial & Javanmardi, Yousef. (2021). Explicit finite element analysis of slope stability by strength reduction. Geomechanics and Engineering. 26. 10.12989/gae.2021.26.2.133.
[2] Dawson, Ethan & Motamed, Farid & Nesarajah, Saddanathapillai & Roth, Wolfgang. (2000). Geotechnical Stability Analysis by Strength Reduction. 289. 99-113. 10.1061/40512(289)8.
[3] Shiguo Xiao, Wei Dong Guo, and Jinxiu Zeng. 2017. Factor of safety of slope stability from deformation energy. Canadian Geotechnical Journal. 55 (2): 296-302.
[4] Zienkiewicz, O. & Humpheson, Chris & Lewis, Roland. (1975). Associated and non-associated visco-plasticity and plasticity in soil mechanics. Geotechnique. 25. 671-689. 10.1680/geot.1975.25.4.671. Balmer G. 1952. A general analytical solution for Mohr’s envelope. American Society for Testing and Materials, vol. 52, pp. 1260-1271.
[5] Smith, Ian & Griffiths, D. & Margetts, Lee. (2014). Programming the Finite Element Method. 5. Tu, Yiliang & Zhong, Zuliang & Luo, Weikun & Liu, Xinrong & Wang, Sui. (2016). A modified shear strength reduction finite element method for soil slope under wetting-drying cycles. Geomechanics and Engineering. 11. 739-756. 10.12989/gae.2016.11.6.739.
[6] Kaveh, A. & Hamze-Ziabari, S. M. & Bakhshpoori, Taha. (2018). Soft computing-based slope stability assessment: A comparative study. Geomechanics and Engineering. 14. 257-269. 10.12989/gae.2018.14.3.257.
[7] Matsui, T., & San, K.-C. (1992). Finite Element Slope Stability Analysis by Shear Strength Reduction Technique. Soils and Foundations, 32, 59-70.
[8] Balmer G. 1952. A general analytical solution for Mohr’s envelope. American Society for Testing and Materials, vol. 52, pp. 1260-1271.
[9] Hammah, R. E., J. H. Curran, T. E. Yacoub, and B. Corkum. 2004. Stability analysis of rock slopes using the Finite Element Method. In Proceedings of the ISRM Regional Symposium EUROCK 2004 and the 53rd Geomechanics Colloquy, Salzburg, Austria.
[10] Rocscience Inc. 2005. Phase2 v6.0 – a two-dimensional finite element analysis program. Rocscience Inc. 2003. Slide v5.0 – a slope stability program based on limit-equilibrium analysis.
[11] D. J. Robert, A Modified Mohr-Coulomb Model to Simulate the Behavior of Pipelines in Unsaturated Soils, Computers and Geotechnics, Volume 91, 2017, Pages 146-160.
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  • APA Style

    Mahendra Acharya, Asim Timalsina, Ujjan Paudel. (2023). Shear Strength Reduction Analysis of Slope by Numerical Modelling Based on Finite Element Method. American Journal of Science, Engineering and Technology, 8(3), 125-132. https://doi.org/10.11648/j.ajset.20230803.11

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    ACS Style

    Mahendra Acharya; Asim Timalsina; Ujjan Paudel. Shear Strength Reduction Analysis of Slope by Numerical Modelling Based on Finite Element Method. Am. J. Sci. Eng. Technol. 2023, 8(3), 125-132. doi: 10.11648/j.ajset.20230803.11

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    AMA Style

    Mahendra Acharya, Asim Timalsina, Ujjan Paudel. Shear Strength Reduction Analysis of Slope by Numerical Modelling Based on Finite Element Method. Am J Sci Eng Technol. 2023;8(3):125-132. doi: 10.11648/j.ajset.20230803.11

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  • @article{10.11648/j.ajset.20230803.11,
      author = {Mahendra Acharya and Asim Timalsina and Ujjan Paudel},
      title = {Shear Strength Reduction Analysis of Slope by Numerical Modelling Based on Finite Element Method},
      journal = {American Journal of Science, Engineering and Technology},
      volume = {8},
      number = {3},
      pages = {125-132},
      doi = {10.11648/j.ajset.20230803.11},
      url = {https://doi.org/10.11648/j.ajset.20230803.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajset.20230803.11},
      abstract = {The stability of the slope is the crucial factor in geotechnical engineering, particularly when the slopes are composed of soils. The purpose of this research is to analyze the shear strength reduction of glacial till slope using phase 2 software. Where, conclusive analysis is based on two methods, Limit equilibrium and the Mohr-Colomb criterion Finite Element (FE) Shear Strength Reduction (SSR). The methodology embodied the major laboratory test results such as Atterberg limits, Direct Shear Strength test, unconfined compression strength. The experimental results were than used in phase 2 software, where 2D plane strain model of the slope was created. The impact of modifications in shear strength parameters on the factor of safety is then examined. The analysis showed that the glacial till slope experienced a significant reduction in strength, with the Limit Equilibrium method FOS ranging from 0.94 to 1.54, while Mohr’s criterion Finite Elements Shear Strength Reduction ranged from 0.31 to 0.61. The analysis results, in conclusion, the shear strength reduction of slope is reliable and efficient for determining the stability of slopes. The use of both aforementioned methods provides accurate and consistent results that can aid in making effective engineering decisions.},
     year = {2023}
    }
    

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  • TY  - JOUR
    T1  - Shear Strength Reduction Analysis of Slope by Numerical Modelling Based on Finite Element Method
    AU  - Mahendra Acharya
    AU  - Asim Timalsina
    AU  - Ujjan Paudel
    Y1  - 2023/07/11
    PY  - 2023
    N1  - https://doi.org/10.11648/j.ajset.20230803.11
    DO  - 10.11648/j.ajset.20230803.11
    T2  - American Journal of Science, Engineering and Technology
    JF  - American Journal of Science, Engineering and Technology
    JO  - American Journal of Science, Engineering and Technology
    SP  - 125
    EP  - 132
    PB  - Science Publishing Group
    SN  - 2578-8353
    UR  - https://doi.org/10.11648/j.ajset.20230803.11
    AB  - The stability of the slope is the crucial factor in geotechnical engineering, particularly when the slopes are composed of soils. The purpose of this research is to analyze the shear strength reduction of glacial till slope using phase 2 software. Where, conclusive analysis is based on two methods, Limit equilibrium and the Mohr-Colomb criterion Finite Element (FE) Shear Strength Reduction (SSR). The methodology embodied the major laboratory test results such as Atterberg limits, Direct Shear Strength test, unconfined compression strength. The experimental results were than used in phase 2 software, where 2D plane strain model of the slope was created. The impact of modifications in shear strength parameters on the factor of safety is then examined. The analysis showed that the glacial till slope experienced a significant reduction in strength, with the Limit Equilibrium method FOS ranging from 0.94 to 1.54, while Mohr’s criterion Finite Elements Shear Strength Reduction ranged from 0.31 to 0.61. The analysis results, in conclusion, the shear strength reduction of slope is reliable and efficient for determining the stability of slopes. The use of both aforementioned methods provides accurate and consistent results that can aid in making effective engineering decisions.
    VL  - 8
    IS  - 3
    ER  - 

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Author Information
  • Central Department of Geology, Tribhuvan University, Kathmandu, Nepal

  • Department of Geology, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu, Nepal

  • Kantipur Engineering College, Tribhuvan University, Kathmandu, Nepal

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