Volume 2, Issue 1 — Year 2025 — Article e100025

ISSN (Online): 3115-8129 Biannually

Laboratory Investigation of Creep Behavior in High-Plasticity Loose Soils under Constant Shear Stress

Article Type: Research
Pages: e100025
DOI: https://doi.org/10.22034/CGEL.2.1.e100025
Crossmark
Open Access
Authors
Affiliations
  1. Department of Civil Engineering, Islamic Azad University Malekan Branch, Malekan 5561788389, Iran
  2. Department of Civil and Environmental Engineering, Urmia University, Urmia 5756151818, Iran
  3. Department of Civil and Environmental Engineering, Urmia University, Urmia 5756151818, Iran
  4. Department of Civil Engineering, Islamic Azad University Malekan Branch, Malekan 5561788389, Iran
Corresponding author
Email: koohdarag@malekaniau.ac.ir
ORCID: 0009-0005-9969-3269
Received: 12 January 2025 / Accepted: 28 March 2025 / Published: 11 April 2025
Abstract

This study examines the creep behavior of loose, high-plasticity soils under constant shear stress through a comprehensive laboratory investigation. High-plasticity loose soils, characterized by their substantial water retention capacity and susceptibility to significant deformation, pose critical challenges in engineering applications due to their time-dependent behavior under sustained loads. To analyze these behaviors, we conducted 25 laboratory tests, including Atterberg limits, particle size distribution, direct shear tests, and oedometer analysis. The results indicate that creep deformation in high-plasticity soils progresses in three stages (i.e. primary, secondary, and tertiary) with the rate and magnitude of deformation significantly influenced by factors such as applied stress levels, moisture content, and soil structure. Observations reveal that increased water content and higher stress levels accelerate creep deformation, while the soil's mineralogical composition governs its overall response. The findings also highlight the necessity of incorporating time-dependent behavior into the design and analysis of geotechnical projects involving high-plasticity soils.

Keywords

Creep behavior, Loose soils, High plasticity, Shear stress, Laboratory evaluation

Data availability statement

The data supporting the findings of this study are available within article. No publicly archived dataset was generated.

Funding

This research received no external funding.

Highlights
  • High-plasticity soils show time-dependent creep behavior
  • Moisture and stress increase deformation rate
  • Results support improved geotechnical design
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How to cite
Danesh, N., Taghizadeh, A., Valinejad, M., & Kouhdaragh, M. (2025). Laboratory Investigation of Creep Behavior in High-Plasticity Loose Soils under Constant Shear Stress. Civil and Geoengineering Letters, 2(1), e100025. https://doi.org/10.22034/CGEL.2.1.e100025
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