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Effect of Moisture Content on the Permanent Strain of Yellow River Alluvial Silt under Long-Term Cyclic Loading

Author

Listed:
  • Zibo Du

    (School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China)

  • Zheng Zhang

    (School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China)

  • Lei Wang

    (School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China)

  • Jingwei Zhang

    (School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China)

  • Yonghui Li

    (School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China)

Abstract

The Yellow River alluvial silt has unique engineering properties and is unstable when encountering moisture. The mechanical properties of silt subgrade can be impaired by the increase in moisture content due to rainwater infiltration, which has a negative effect on traffic safety. To further reveal the influence of moisture content on the deformation characteristics of silt, a series of monotonic and cyclic triaxial tests were conducted on the alluvial silt with different moisture contents. The development law of cyclic accumulative permanent strain and the effects of moisture content, cyclic deviator stress and confining pressure on the axial permanent strain of silt were explored. The study shows that the static strength of silt decreases with the increase in moisture content, and the attenuation of static strength is mainly caused by the decrease in cohesion due to the reduction in matric suction. The permanent strain rises linearly with the increase in moisture content and cyclic deviator stress, and decreases with the increase in confining pressure. An empirical model for predicting the permanent strain of silt under long-term cyclic loading considering the effect of moisture content was established. Compared with the test data and other existing models, the established model has easier obtained parameters, higher prediction accuracy and better applicability.

Suggested Citation

  • Zibo Du & Zheng Zhang & Lei Wang & Jingwei Zhang & Yonghui Li, 2023. "Effect of Moisture Content on the Permanent Strain of Yellow River Alluvial Silt under Long-Term Cyclic Loading," Sustainability, MDPI, vol. 15(17), pages 1-24, September.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:17:p:13155-:d:1230893
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    References listed on IDEAS

    as
    1. Liguo Yang & Shengjun Shao & Fuquan Wang & Liqin Wang, 2023. "Experimental Study on the Axial Deformation Characteristics of Compacted Lanzhou Loess under Traffic Loads," Sustainability, MDPI, vol. 15(14), pages 1-17, July.
    2. Xing-Wei Ren & Yi-Qun Tang & Jun Li & Qi Yang, 2012. "A prediction method using grey model for cumulative plastic deformation under cyclic loads," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 64(1), pages 441-457, October.
    3. Gangnian Xu & Youzhi Wang & Shangbin Liu & Shimin Wang, 2018. "Tensioning-Phase Box Girder Deformation Prediction Model Based on Ant Colony Algorithm and Residual Correction," Mathematical Problems in Engineering, Hindawi, vol. 2018, pages 1-17, December.
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