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Study on the Unified Mechanical Properties of Ili Undisturbed Loess under the Influence of Soluble Salt

Author

Listed:
  • Lisi Niu

    (School of Emergency Management, Henan Polytechnic University, Jiaozuo 454003, China
    Safety and Emergency Management Research Center, Henan Polytechnic University, Jiaozuo 454003, China)

  • Haoshuang Niu

    (School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China)

  • Yongquan Zhao

    (Capital Construction Department, Henan Polytechnic University, Jiaozuo 454003, China)

  • Lihong Ge

    (College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, China)

  • Ming Guo

    (School of Emergency Management, Henan Polytechnic University, Jiaozuo 454003, China
    Safety and Emergency Management Research Center, Henan Polytechnic University, Jiaozuo 454003, China)

  • Wenyuan Ren

    (College of Water Resources and Architectural Engineering, Northwest A & F University, Xianyang 712100, China)

  • Yuguo Wang

    (College of Water Resources and Architectural Engineering, Northwest A & F University, Xianyang 712100, China)

  • Aijun Zhang

    (College of Water Resources and Architectural Engineering, Northwest A & F University, Xianyang 712100, China)

Abstract

Through three stress path tests of unsaturated Ili undisturbed loess, the effect of soluble salt content on the deformation of net mean stress, suction, and deviated stress were investigated. The mechanical properties of the normalized compression curve, soil water characteristic curve and critical state line were revealed. The test results indicate that: in the isotropic compression test, the normal compression curves controlling different suctions can be characterized by using the initial void ratio and the yield net mean stress, and can be described as a two-parameter exponential function. In the triaxial shrinkage test, the soil water characteristic curves controlling vary net mean stresses are dimensionless by using saturated moisture and air entry value, and the normalization formula can be characterized by a single parameter exponential function. In the consolidation shear test, the corresponding effective net mean stress is calculated by suction and saturation. The critical state lines under the unsaturated condition controlling vary suctions can be described as the critical state line under the saturated condition on the plane of effective net mean stress and deviator stress. When the effective net mean stress is constant, the critical state lines under the unsaturated condition can be characterized by the degree of gas saturation and the ratio of unsaturated void ratio to saturated void ratio. The research will offer reference pointing at the regulation and utilization of water and salt in the loess region of Central Asia, so as to better guarantee the sustainable development of saline-alkali land project construction.

Suggested Citation

  • Lisi Niu & Haoshuang Niu & Yongquan Zhao & Lihong Ge & Ming Guo & Wenyuan Ren & Yuguo Wang & Aijun Zhang, 2023. "Study on the Unified Mechanical Properties of Ili Undisturbed Loess under the Influence of Soluble Salt," Sustainability, MDPI, vol. 15(20), pages 1-13, October.
  • Handle: RePEc:gam:jsusta:v:15:y:2023:i:20:p:14717-:d:1257131
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    References listed on IDEAS

    as
    1. Yanxiao Mu & Zizhao Zhang & Tiansheng Zhou & Zekun Guo, 2023. "Effect of Mica Content on Mechanical Properties of Yili River Valley Loess under the Impact of Freezing and Thawing," Sustainability, MDPI, vol. 15(4), pages 1-16, February.
    2. Xin Wei & Li Dong & Xuanyi Chen & Yunru Zhou, 2023. "Influence of Soluble Salt NaCl on Cracking Characteristics and Mechanism of Loess," Sustainability, MDPI, vol. 15(6), pages 1-16, March.
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