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XUE Qiang, ZHANG Maosheng, BI Junbo, et al. Exfoliation Erosion and Deformation Failure of Excavated Loess Slope[J]. Northwestern Geology, 2019, 52(2): 158-166. DOI: 10.19751/j.cnki.61-1149/p.2019.02.016
Citation: XUE Qiang, ZHANG Maosheng, BI Junbo, et al. Exfoliation Erosion and Deformation Failure of Excavated Loess Slope[J]. Northwestern Geology, 2019, 52(2): 158-166. DOI: 10.19751/j.cnki.61-1149/p.2019.02.016
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Exfoliation Erosion and Deformation Failure of Excavated Loess Slope

  • 1. Key Laboratory for Geo-hazards in Loess Area, MNR, Xi'an Center of China Geological Survey/Northwest China Center for Geoscience Innovation, Xi'an 710054, Shaanxi, China;

  • 2. Yan'an Meteorological Bureau, Yan'an 716000, Shaanxi, China

More Information
  • Received Date: March 19, 2018
  • Revised Date: February 13, 2019
  • Available Online: July 28, 2022
  • Published Date: June 04, 2019
    Graphical Abstract
    • Abstract
  • Excavation activity is one of the most active factors to cause the loess geo-hazards. In order to reveal the deformation and failure characteristics of the excavated loess slope under unloading, exfoliation and erosion, and its influence on the slope stability, 23 excavated loess slopes have been studied through carrying out field investigation, in-situ micro penetration test and indoor test in Yan'an area, Shaanxi Province. The results show that there is a linear positive correlation between the thickness of slope unloading exfoliation layer and the slope excavation age, and there is a negatively power correlation between the on-site penetration resistance value and the slope excavation age, and the shallow soil chemical erosion is stronger than deep soil. The deformation and failure modes of excavated loess slopes are mainly slip-type collapse and creep-slipping shallow landslide. The failure and evolution process of collapse is mainly "exfoliation erosion-concave-crack-slip", while the failure and evolution process of landslide is mainly "creep-pull-through-slip".
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    • References (29)
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