Geomechanics and Engineering

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Factors affecting hydraulic anisotropy of soil

  • Nurly Gofar (Department of Civil Engineering, Post Graduate Program, Universitas Bina Darma) ;
  • Alfrendo Satyanaga (Department of Civil and Environmental Engineering, Nazarbayev University) ;
  • Gerarldo D. Aventian (Department of Civil and Environmental Engineering, Nazarbayev University) ;
  • Gulnur Pernebekova (Department of Civil and Environmental Engineering, Nazarbayev University) ;
  • Zhanat Argimbayeva (Department of Civil and Environmental Engineering, Nazarbayev University) ;
  • Sung-Woo Moon (Department of Civil and Environmental Engineering, Nazarbayev University) ;
  • Jong Kim (Department of Civil and Environmental Engineering, Nazarbayev University)
  • Received : 2022.08.09
  • Accepted : 2023.12.30
  • Published : 2024.02.25
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Abstract

The hydraulic anisotropic behavior of unsaturated soil has not been fully explored in relation to the grain-size distribution. The present study conducted laboratory assessments to examine the hydraulic anisotropy condition of statically compacted specimens in various initial states. The investigation incorporated the concept of hydraulic anisotropy by employing two discrete forms of soil stratification: horizontal-layering (HL) and vertical-layering (VL). The examined soils comprised sandy silt and silty sand, exhibiting either unimodal or bimodal soil-water characteristic curve (SWCC). This study aimed to investigate the potential correlation between the hydraulic anisotropy ratio and soil properties. The present study established a correlation between the hydraulic anisotropy ratio and several soil parameters, including fine content, dry density, plastic limit, and liquid limit. The study results indicate a non-linear relationship between the percentage of fine and dry density in soils with unimodal and bimodal soil-water characteristic curve (SWCC) and hydraulic anisotropy ratio.

Keywords

Acknowledgement

This research was supported by the Nazarbayev University Research Fund under Faculty Development Competitive Research Grants Program (FDCRGP) Grant No. 20122022FD4133. The authors are grateful for this support. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the Nazarbayev University.

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