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<p>This study conducted dynamic triaxial tests to investigate the long-term deformation characteristics of a geocell-reinforced subgrade. Parameters such as the dynamic stress amplitude (60, 80, 120, and 150 kPa), confining pressure (20, 30, and 40 kPa), water content (10%, 12.1%, and 14.5%), and cell spacing (0, 10, 20, and 30 mm) were considered, and a model for calculating the permanent settlement of the subgrade was established using Boussinesq’s theory. The triaxial tests results indicate that there is a linear relationship between the dynamic strain and logN, where N is the number of cyclic loadings. Comparisons between the theoretical calculations and field measurements revealed that settlement primarily occurs within the first year and accounts for 84.1% of the total settlement over 15 years. Furthermore, settlement can increase by up to 188% under the combined influence of axle load and water content, highlighting their significant contribution to the deformation of reinforced soil subgrades.</p>

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Research on Long-Term Deformation Laws and Settlement Prediction of Geocell Reinforced Silty Embankments

  • 期刊论文

  • 发表日期：

    2026年7月7日

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  • Hao Li,
  • Wuwei Zhu,
  • Yi Yao,
  • Xiaohua Yang

摘要

This study conducted dynamic triaxial tests to investigate the long-term deformation characteristics of a geocell-reinforced subgrade. Parameters such as the dynamic stress amplitude (60, 80, 120, and 150 kPa), confining pressure (20, 30, and 40 kPa), water content (10%, 12.1%, and 14.5%), and cell spacing (0, 10, 20, and 30 mm) were considered, and a model for calculating the permanent settlement of the subgrade was established using Boussinesq’s theory. The triaxial tests results indicate that there is a linear relationship between the dynamic strain and logN, where N is the number of cyclic loadings. Comparisons between the theoretical calculations and field measurements revealed that settlement primarily occurs within the first year and accounts for 84.1% of the total settlement over 15 years. Furthermore, settlement can increase by up to 188% under the combined influence of axle load and water content, highlighting their significant contribution to the deformation of reinforced soil subgrades.