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The Role Fore Air Flow in Soil Slope Stability Analysis

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Abstract

In order to investigate the effect of the pore air flow in the soil slope stability analysis, a water-air two-phase flow model, based on the multi-phase flow theory, is proposed and with the model, the water-phase and air-phase seepages of the soil slope in the stable seepage and rainfall situations are simulated. The soil slope safety coefficients are obtained according to the simulated pore air pressure and pore water pressure. The calculation results show that in the stable seepage situation, the influence of the pore air pressure on the soil slope stability can be neglected, while in the rainfall situation, the pore air pressure generated in the unsaturated zone will reduce the safety coefficient, and the larger the distance between the slip surface and the underground water level is, the greater the influence of the pore air pressure on the soil slope stability will be.

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Authors and Affiliations

  1. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, 210098, China

    Xiao-yue Zhang, Yue-ming Zhu & Chun-hui Fang

Authors
  1. Xiao-yue Zhang
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  2. Yue-ming Zhu
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  3. Chun-hui Fang
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Corresponding author

Correspondence to Xiao-yue Zhang.

Additional information

Project supported by the China-Austria scientific and technological cooperative project of National Science and Technology Ministry (Grant No. CN 01/2007), the Ministry of Water Resources’ 948 plan, namely technical innovation and transformation projects (Grant No. CT200515).

Biography: ZHANG Xiao-yue (1984-), Female, Ph. D. Candidate

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Zhang, Xy., Zhu, Ym. & Fang, Ch. The Role Fore Air Flow in Soil Slope Stability Analysis. J Hydrodyn 21, 640–646 (2009). https://doi.org/10.1016/S1001-6058(08)60195-X

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  • DOI: https://doi.org/10.1016/S1001-6058(08)60195-X

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