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Physical and Numerical Modeling of Clayey Slopes Reinforced with Roots

International Journal of Civil Engineering (2022)Cite this article

Abstract

The purpose of this study was to explore the influence of vegetation on the stability of clayey slopes. Physical models with varying layer depths reinforced with roots were performed in a geotechnical centrifuge. The soil reinforced with vegetation was simulated with a mixture of clay and fiberglass which present similar shear strength properties. Displacement vectors of the physical models are obtained using the Particle Image Velocimetry (PIV). The computed resultant displacements showed that the slip surface varied with respect the root depth. Additionally, numerical models of the tests in centrifuge were made using finite elements and Bishop's method. The results obtained also show that the deeper the roots, the deeper the sliding surface. The slip surface moves from a depth of the slope toe (slope without reinforcement) to a depth close to twice the height of the slope. Regarding the factor of safety, it varies from a value of 0.7 for slopes without vegetation to 1.19 for a root depth of three meters. Moreover, the factor of safety increases as root depth increases.

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Acknowledgements

The authors would like to acknowledge the Escuela Colombiana de Ingeniería Julio Garavito for funding this research with the internal project for young researchers, “Study of the effect of roots of the grass in soil reinforcement.”

Funding

From Escuela Colombiana de Ingeniería Julio Garavito with the internal project for young researchers, “Study of the effect of roots of the grass in soil reinforcement.”

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Authors and Affiliations

  1. Department of Civil and Environmental Engineering, Escuela Colombiana de Ingeniería Julio Garavito, AK. 45 No. 205-59, Autopista Norte, Bogotá, Colombia

    Catalina Lozada & Jose Vicente Amortegui

  2. Department of Civil Engineering, Universidad Nacional de Colombia Sede Manizales, Carrera 27 # 64-60, Manizales, Caldas, Colombia

    Cristhian Mendoza

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  1. Catalina Lozada
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  2. Cristhian Mendoza
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  3. Jose Vicente Amortegui
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Correspondence to Cristhian Mendoza.

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Lozada, C., Mendoza, C. & Amortegui, J.V. Physical and Numerical Modeling of Clayey Slopes Reinforced with Roots. Int J Civ Eng (2022). https://doi.org/10.1007/s40999-022-00733-0

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  • DOI: https://doi.org/10.1007/s40999-022-00733-0

Keywords

  • Roots reinforcement
  • Clayey soil
  • Slope stability
  • Geotechnical centrifuge