Optimization of geometric parameters of soil nailing using Response Surface Methodology

Fadila Benayoun, Djamalddine Boumezerane*, Souhila Rehab Bekkouche, Fadhel Ismael

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

Optimization of parameters of soil nailing is an important task in reinforcement soil problems. This paper focuses on the effect of nail geometric parameters on soil nailed wall analysis and identifies which factors that most affect their stability and cost using Response Surface Methodology (RSM). RSM has been chosen to achieve an optimum combination of the soil nailing wall design. The influence of three factors have been considered, it included nail length, its inclination and vertical spacing between nails.

After a finite element analysis to model and perform the soil nailing simulations, a BoxBehnken Design was applied, based on a set of experiments using various
combinations. For this purpose, 15 runs were conducted to analyze tested parameters and to determine their interactions. The analysis of variance (ANOVA), contour lines and 3D response plots were investigated and therefore the most important parameters affecting the safety factor and the cost were identified.

From the goodness-of-fit analyzes of the model and the illustrative example, the
proposed regression model provides a reasonably good estimate of the overall safety factor for soil nail walls and their cost. The results obtained from this study showed that RSM is an efficient and effective tool to identify the optimal combination and it emerges that the safety factor and cost are most influenced by nail length and vertical spacing.
Original languageEnglish
Article number1965
Pages (from-to)1965
Number of pages14
JournalArabian Journal of Geosciences
Volume14
Issue number19
DOIs
Publication statusPublished - 8 Sep 2021

Keywords

  • modeling
  • optimization
  • soil nailing wall
  • finite element
  • analysis
  • response surface methodology

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