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Cyclic and Post-Cyclic Behaviors of Stabilized Sand-Containing Soft Soil in Coastal Areas

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  • Lingshi An

    (School of Civil and Architecture Engineering, East China University of Technology, Nanchang 330013, China)

  • Xinxin Zhao

    (School of Civil and Architecture Engineering, East China University of Technology, Nanchang 330013, China)

  • Dongwei Li

    (School of Civil and Architecture Engineering, East China University of Technology, Nanchang 330013, China)

  • Liu Yang

    (Department of Natural Resources, Hunan Vocational College Engineering, Changsha 410151, China)

  • Peng Li

    (School of Civil and Architecture Engineering, East China University of Technology, Nanchang 330013, China)

  • Lei Guo

    (School of Civil and Architecture Engineering, East China University of Technology, Nanchang 330013, China)

  • Lina Wang

    (School of Construction Engineering, Yunnan Agricultural University, Kunming 650201, China)

Abstract

Land resources are being depleted due to global climate change, and as a result, infrastructures such as expressways and high-speed railways have no option but to be built in soft soil regions. Hence, the cyclic and post-cyclic behaviors of soft soil are vitally important. However, little attention has been devoted to this issue. In the current study, a series of cyclic triaxial tests and standard monotonic loading tests were carried out in order to investigate the cyclic and post-cyclic behavior of stabilized sand-containing soft soil. In addition, the stiffness evolution index model was proposed to describe the characteristics of stiffness evolution. The results show that for a given number of loading cycles, stiffness almost linearly decreases with the increase in sand content. The higher the confining pressure is, the greater the stiffness is. The cement content has the greatest impact on the stiffness evolution index. The stiffness evolution index model can provide a good description of experimental data. The initial value of post-cyclic axial strain is non-zero due to the accumulative strain caused by previous cyclic loading. Post-cyclic stress increases rapidly within a small range of strain and can reach peak stress with great speed. The post-cyclic initial tangent modulus increases from 1602 kPa to 4803 kPa as the cement content increases from 6% to 12%.

Suggested Citation

  • Lingshi An & Xinxin Zhao & Dongwei Li & Liu Yang & Peng Li & Lei Guo & Lina Wang, 2022. "Cyclic and Post-Cyclic Behaviors of Stabilized Sand-Containing Soft Soil in Coastal Areas," Sustainability, MDPI, vol. 14(22), pages 1-17, November.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:22:p:15017-:d:971679
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    References listed on IDEAS

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    1. Feifei Wang & Jinggan Shao & Wenkai Li & Yafei Wang & Longfei Wang & Honglin Liu, 2022. "Study on the Effect of Pile Foundation Reinforcement of Embankment on Slope of Soft Soil," Sustainability, MDPI, vol. 14(21), pages 1-11, November.
    2. Maitê Rocha Silveira & Paulo César Lodi & Natália de Souza Correia & Roger Augusto Rodrigues & Heraldo Luiz Giacheti, 2020. "Effect of Recycled Polyethylene Terephthalate Strips on the Mechanical Properties of Cement-Treated Lateritic Sandy Soil," Sustainability, MDPI, vol. 12(23), pages 1-19, November.
    3. Patimapon Sukmak & Gampanart Sukmak & Suksun Horpibulsuk & Sippakarn Kassawat & Apichat Suddeepong & Arul Arulrajah, 2021. "Improved Mechanical Properties of Cement-Stabilized Soft Clay Using Garnet Residues and Tire-Derived Aggregates for Subgrade Applications," Sustainability, MDPI, vol. 13(21), pages 1-19, October.
    4. Syed Taseer Abbas Jaffar & Malik Muneeb Abid & Sikander Zaman Khan & Turab Jafri & Zia Ur Rehman & Muhammad Atiq Ur Rehman Tariq & Anne W. M. Ng, 2022. "Evaluation of Conventional and Sustainable Modifiers to Improve the Stiffness Behavior of Weak Sub-Grade Soil," Sustainability, MDPI, vol. 14(5), pages 1-19, February.
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