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Volume 33 Issue 6
Dec.  2022
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LI Jinpeng, WANG Lei, WANG Jun, et al. Stability analysis of expansive soil slopes considering shear strength decay characteristics[J]. The Chinese Journal of Geological Hazard and Control, 2022, 33(6): 29-36. DOI: 10.16031/j.cnki.issn.1003-8035.202109028
Citation: LI Jinpeng, WANG Lei, WANG Jun, et al. Stability analysis of expansive soil slopes considering shear strength decay characteristics[J]. The Chinese Journal of Geological Hazard and Control, 2022, 33(6): 29-36. DOI: 10.16031/j.cnki.issn.1003-8035.202109028
shu

Stability analysis of expansive soil slopes considering shear strength decay characteristics

  • 1.

    College School of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai　201620, China

  • 2.

    Department of Civil Engineering, Shanghai Jiaotong University, Shanghai　200240, China

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  • Received Date: September 26, 2021
  • Revised Date: December 06, 2021
  • Available Online: October 13, 2022
    Graphical Abstract
    • Abstract
  • In order to address the problem that the dynamic decay of shear strength of expansive soil in the process of rainfall infiltration cannot be considered in the traditional slope stability analysis of expansive soil, indoor direct shear test was carried out to systematically study the influence of dry density and water content on the indicators of shear strength of expansive soil, viz., cohesion and internal friction angle. At the same time, the stability analysis of the expansive soil slope based on the strength reduction method was carried out with the shear strength testing results, and the change law of slope stability with the dynamic decay of shear strength was obtained. The results show that the increase of water content and the decrease of dry density will cause the decay of cohesion and internal friction angle of expansive soil, and the decay of cohesion is significant, while the decay of internal friction angle is less; the stability of expansive soil slope is mainly controlled by the water content of weathering layer, and with the increase of water content of expansive soil, the slope gradually evolves from stable state to unstable state, while the influence of dry density on the stability of expansive soil slope is relatively small.
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    • References (19)
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