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Numerical Finite Element Analysis of the Soil Mass Subjected to the Impulsive Load of a Standard Penetration Test (SPT): Assessment of Young’s Modulus of Soils

Received: 1 April 2022    Accepted: 22 April 2022    Published: 26 May 2022
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Abstract

In this paper, we propose a method for the direct determination of the Young's modulus of soils from the Standard Penetration Test by performing back-calculations iteratively knowing the reference sinkage which is 30 cm. We modeled the Standard Penetration Test taking into account the experimental protocol in the field and the typical Impulsive load subjected in the soils mass. Numerical simulations have been carried out using the Finite Element calculation code Cast3M in 2-D axisymmetric. For all the calculations, the Poisson's ratio was taken as equal to 0.3 for the soil and a unit weight of all the soils set at 17 kN/m3. The influence of the drilling diameter was taken into account, with two modeled pre-drilling diameters, 65 and 200 mm. From these dynamic calculations at small time steps, carried out in a semi-infinite soil mass without natural water content, it appears that the Young's modulus of the soils determined by our method, strongly depends on the number of blows at the SPT of the test depth and the diameter of the borehole. Tables, charts for practical use and a direct relationship for determining the Young's modulus of soils subjected by SPT by this method have been established and proposed in this paper funtion of the number of blows at the SPT.

Published in American Journal of Civil Engineering (Volume 10, Issue 3)
DOI 10.11648/j.ajce.20221003.12
Page(s) 88-108
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), 2024. Published by Science Publishing Group

Keywords

Soil Mass, Standard Penetration Test, Impulsive Load, Numerical Siimulation, Young’s Modulus

References
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  • APA Style

    Zoa Ambassa, Amba Jean Chills. (2022). Numerical Finite Element Analysis of the Soil Mass Subjected to the Impulsive Load of a Standard Penetration Test (SPT): Assessment of Young’s Modulus of Soils. American Journal of Civil Engineering, 10(3), 88-108. https://doi.org/10.11648/j.ajce.20221003.12

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    ACS Style

    Zoa Ambassa; Amba Jean Chills. Numerical Finite Element Analysis of the Soil Mass Subjected to the Impulsive Load of a Standard Penetration Test (SPT): Assessment of Young’s Modulus of Soils. Am. J. Civ. Eng. 2022, 10(3), 88-108. doi: 10.11648/j.ajce.20221003.12

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    AMA Style

    Zoa Ambassa, Amba Jean Chills. Numerical Finite Element Analysis of the Soil Mass Subjected to the Impulsive Load of a Standard Penetration Test (SPT): Assessment of Young’s Modulus of Soils. Am J Civ Eng. 2022;10(3):88-108. doi: 10.11648/j.ajce.20221003.12

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  • @article{10.11648/j.ajce.20221003.12,
      author = {Zoa Ambassa and Amba Jean Chills},
      title = {Numerical Finite Element Analysis of the Soil Mass Subjected to the Impulsive Load of a Standard Penetration Test (SPT): Assessment of Young’s Modulus of Soils},
      journal = {American Journal of Civil Engineering},
      volume = {10},
      number = {3},
      pages = {88-108},
      doi = {10.11648/j.ajce.20221003.12},
      url = {https://doi.org/10.11648/j.ajce.20221003.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajce.20221003.12},
      abstract = {In this paper, we propose a method for the direct determination of the Young's modulus of soils from the Standard Penetration Test by performing back-calculations iteratively knowing the reference sinkage which is 30 cm. We modeled the Standard Penetration Test taking into account the experimental protocol in the field and the typical Impulsive load subjected in the soils mass. Numerical simulations have been carried out using the Finite Element calculation code Cast3M in 2-D axisymmetric. For all the calculations, the Poisson's ratio was taken as equal to 0.3 for the soil and a unit weight of all the soils set at 17 kN/m3. The influence of the drilling diameter was taken into account, with two modeled pre-drilling diameters, 65 and 200 mm. From these dynamic calculations at small time steps, carried out in a semi-infinite soil mass without natural water content, it appears that the Young's modulus of the soils determined by our method, strongly depends on the number of blows at the SPT of the test depth and the diameter of the borehole. Tables, charts for practical use and a direct relationship for determining the Young's modulus of soils subjected by SPT by this method have been established and proposed in this paper funtion of the number of blows at the SPT.},
     year = {2022}
    }
    

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  • TY  - JOUR
    T1  - Numerical Finite Element Analysis of the Soil Mass Subjected to the Impulsive Load of a Standard Penetration Test (SPT): Assessment of Young’s Modulus of Soils
    AU  - Zoa Ambassa
    AU  - Amba Jean Chills
    Y1  - 2022/05/26
    PY  - 2022
    N1  - https://doi.org/10.11648/j.ajce.20221003.12
    DO  - 10.11648/j.ajce.20221003.12
    T2  - American Journal of Civil Engineering
    JF  - American Journal of Civil Engineering
    JO  - American Journal of Civil Engineering
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    EP  - 108
    PB  - Science Publishing Group
    SN  - 2330-8737
    UR  - https://doi.org/10.11648/j.ajce.20221003.12
    AB  - In this paper, we propose a method for the direct determination of the Young's modulus of soils from the Standard Penetration Test by performing back-calculations iteratively knowing the reference sinkage which is 30 cm. We modeled the Standard Penetration Test taking into account the experimental protocol in the field and the typical Impulsive load subjected in the soils mass. Numerical simulations have been carried out using the Finite Element calculation code Cast3M in 2-D axisymmetric. For all the calculations, the Poisson's ratio was taken as equal to 0.3 for the soil and a unit weight of all the soils set at 17 kN/m3. The influence of the drilling diameter was taken into account, with two modeled pre-drilling diameters, 65 and 200 mm. From these dynamic calculations at small time steps, carried out in a semi-infinite soil mass without natural water content, it appears that the Young's modulus of the soils determined by our method, strongly depends on the number of blows at the SPT of the test depth and the diameter of the borehole. Tables, charts for practical use and a direct relationship for determining the Young's modulus of soils subjected by SPT by this method have been established and proposed in this paper funtion of the number of blows at the SPT.
    VL  - 10
    IS  - 3
    ER  - 

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Author Information
  • Laboratory of Research E3M, Department of Civil Engineering, National Higher Polytechnic School of Douala, University of Douala, Douala, Cameroon

  • Laboratory of Research E3M, Department of Civil Engineering, National Higher Polytechnic School of Douala, University of Douala, Douala, Cameroon

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