Volume 44 Issue 2
Feb.  2019
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Liu Yi, Zhao Binbin, Yin Kunlong, Chen Lixia, Gui Lei, Liang Xin, 2019. Sensitivity Analysis of Maliulin Landslide Stability Based on Orthogonal Design. Earth Science, 44(2): 677-684. doi: 10.3799/dqkx.2018.195
Citation: Liu Yi, Zhao Binbin, Yin Kunlong, Chen Lixia, Gui Lei, Liang Xin, 2019. Sensitivity Analysis of Maliulin Landslide Stability Based on Orthogonal Design. Earth Science, 44(2): 677-684. doi: 10.3799/dqkx.2018.195

Sensitivity Analysis of Maliulin Landslide Stability Based on Orthogonal Design

doi: 10.3799/dqkx.2018.195
  • Received Date: 2018-09-15
  • Publish Date: 2019-02-15
  • Taken Maliulin landslide as a case, the friction angle, cohesive strength, hydraulic conductivity, immersion ratio, reservoir drawdown rate and rainfall are chosen as influential factors and orthogonal experiment was carried out. Sensitivity analysis was performed using range analysis.Results show that the stability of Maliulin landslide is mainly influenced by its self-factors, and the reservoir and rainfall have limited impact on landslide stability. Landslide stability is most sensitive to friction angle, followed by hydraulic conductivity, cohesive strength and immersion ratio. The initial landslide stability is mainly influenced by friction angle and cohesive strength. As the decreasing of immersion ratio, the landslide stability has limited increase. The changed ratio of factor of safety is mainly influenced by hydraulic conductivity in which a critical value K0 existed. When hydraulic conductivity is greater than K0, the landslide stability increases with the increasing of permeability coefficient. On the contrary, the landslide stability decreases with the decreasing of hydraulic conductivity when hydraulic conductivity is less than K0.

     

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