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Stability Analysis of Retaining Walls with Geocell-Reinforced Road Milling Materials

Author

Listed:
  • Bingbing Zhang

    (School of Highway Engineering, Chang’an University, Xi’an 710064, China)

  • Fei Song

    (School of Highway Engineering, Chang’an University, Xi’an 710064, China)

  • Weiguang Li

    (School of Highway Engineering, Chang’an University, Xi’an 710064, China)

Abstract

A series of triaxial compression tests with different confining pressures were conducted for gravels, road surface milling materials, and surface–base milling mixtures to investigate the stress–strain relationships of these three kinds of materials. On the basis of the analysis of the test results, the strength and the deformation of the geocell-reinforced surface milling materials and the geocell-encased surface–base milling mixtures were predicted and compared with those of the gravels via the constitutive model of geocell–soil composites. The effects of the geocell pocket size, tensile stiffness, and the peak internal frictional angle on the stress–strain responses of the geocell-reinforced surface–base milling mixtures were examined. Moreover, by employing the finite element strength reduction technique, stability analysis was conducted on the geocell-reinforced retaining wall with the surface–base milling mixtures to investigate the factor of safety and the failure mechanism of the structure. The study results indicated that the surface milling materials exhibited strain hardening, while the gravels and the surface–base milling mixtures exhibited strain softening. The surface milling materials displayed evident shear contraction characteristics, whereas the gravels and surface–base milling mixtures first displayed shear contraction and later dilatancy features. In addition, the strength of the geocell-reinforced surface milling materials is smaller than that of the gravels, but the strength of the geocell-encased surface–base milling mixtures is larger than that of the gravels. Thus, the geocell-reinforced surface–base milling mixtures can be used to replace the gravels in engineering practices. Additionally, the size of the sliding wedge and the factor of safety of the retaining walls increase significantly with reductions in the geocell pocket size.

Suggested Citation

  • Bingbing Zhang & Fei Song & Weiguang Li, 2023. "Stability Analysis of Retaining Walls with Geocell-Reinforced Road Milling Materials," Sustainability, MDPI, vol. 15(5), pages 1-18, February.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:5:p:4297-:d:1083023
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    References listed on IDEAS

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    1. Yancang Li & Lei Zhao & Juanjuan Suo, 2014. "Comprehensive Assessment on Sustainable Development of Highway Transportation Capacity Based on Entropy Weight and TOPSIS," Sustainability, MDPI, vol. 6(7), pages 1-9, July.
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    Cited by:

    1. Zheng Zuo & Xiuqiang Hao & Huiqiang Li & Wei Wang & Guangqing Yang & Ying Liu, 2023. "Effect of the Slit on the Mechanical Tearing Behavior of High-Density Polyethylene and Polyester Geocell Strips," Sustainability, MDPI, vol. 15(18), pages 1-17, September.

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