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The Probabilistic Stability Analysis of Saturated-Unsaturated MH and CL Soil Slope with Rainfall Infiltration

  • Geotechnical Engineering
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Abstract

It is well known that the slope failure in unsaturated soil is the decrease in the matric suction, when the rain water infiltrates. However, the seepage mechanism and the stability of unsaturated soil slope have not been well established in geotechnical engineering. In this study, the suction profile and reliability index of saturated-unsaturated slope is studied at different rainfall condition with intensity in the range of saturated hydraulic conductivity of MH and CL soil. The finite element seepage model is uncoupled with slope stability model to calculate the reliability index at different time of long duration uniform rainfall. For CL soil slope, the reliability index is slightly changed during and after rain fall infiltration. For the MH soil slope the wetting front remains unsaturated up to a certain time of rainfall infiltration. After this time, the infiltrated rainfall reaches the ground water table and elevates it. The reliability index of the soil slope is thus reduced.

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Authors and Affiliations

  1. Dept. of Civil Engineering, Sarhad University of Science and Information Technology, Peshawar, Pakistan

    Khalid Mahmood & Hassan Khan

  2. Dept. of Civil Engineering, Pusan National University, Busan, South Korea

    Jin Man Kim

  3. Dept. of Civil & Environmental Engineering, Western Ontario University, London, Canada

    Muhammad Safdar

  4. Sarhad University of Science and Information Technology, Peshawar, Pakistan

    Usman Khan

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  1. Khalid Mahmood
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  2. Jin Man Kim
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  3. Hassan Khan
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  4. Muhammad Safdar
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  5. Usman Khan
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Correspondence to Khalid Mahmood.

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Mahmood, K., Kim, J.M., Khan, H. et al. The Probabilistic Stability Analysis of Saturated-Unsaturated MH and CL Soil Slope with Rainfall Infiltration. KSCE J Civ Eng 22, 1742–1749 (2018). https://doi.org/10.1007/s12205-017-1052-5

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  • DOI: https://doi.org/10.1007/s12205-017-1052-5

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