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Journal of Mountain Science

, Volume 13, Issue 2, pp 352–360 | Cite as

Variation of cavity gas pressure in slopes with weak intercalation under seismic load

  • Xiao-qun Wang
  • Zhen-lin ChenEmail author
  • Zhou Zhou
  • Man Shen
Article

Abstract

This study discussed how cavity gas pressure affects the stability of rock mass with fractures under well controlled laboratory experiments. Suddenly-created void space created and the induced gas pressures have been the focus of active researches because they are associated with fast movement of large-scale landslides. A shaking table experiment was set up to mimic weak-intercalated rock slope under seismic loads. Excessive cavity gas pressure would be produced in weak spots upon a sudden vibration load. The drastically elevated gas pressure is believed to be responsible for the creation of cavities surrounding the tension fracture. With dissipation of the excessive cavity gas pressure, the fractures are in unbounded closed-state. This observation explains that the slope body would be split and loosened under several aftershocks, and with the expanding of the cracks, the slope failure eventually occurred. The research of the mechanism of cavity gas pressure could provide a novel insight into the formation mechanism of landslides under seismic load and has implications for the disaster prevention and control theory for the slope stability evaluation.

Keywords

Landslide Fracture Deformation Weak intercalation Cavity gas pressure 

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Copyright information

© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Xiao-qun Wang
    • 1
  • Zhen-lin Chen
    • 1
    Email author
  • Zhou Zhou
    • 1
  • Man Shen
    • 1
  1. 1.State Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionChengdu University of TechnologyChengduChina

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