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The effect of negative pore-water pressure (suction) is often ignored in slope stability analyses. Based on the theory of infiltration and seepage through an unsaturated soil system, transient numerical analyses for an engineering case of slope instability, caused by the loss of soil suction under the condition of continuous rainfall, are conducted. The results of the analysis show that the unsaturated soil suction has an important effect on the stability of the unsaturated slope. The suction profile depends on the magnitude of the flux, frequency, duration of rainfall and evapotranspiration. In most cases, the simultaneous effect of several factors must be considered in assessing the magnitude of soil suction. The paper highlights the importance of monitoring soil suction in engineering practice for slope stability purposes.
The effect of negative pore-water pressure (suction) is often ignored in slope stability analyses. Based on the theory of infiltration and seepage through an unsaturated soil system, transient numerical analyses for an engineering case of slope instability, caused by the loss of soil suction under the condition of continuous rainfall, are conducted. The results of the analysis show that the unsaturated soil suction has an important effect on the stability of the unsaturated slope. The suction profile depends on the magnitude of the flux, frequency, duration of rainfall and evapotranspiration. In most cases, the simultaneous effect of several factors must be considered in assessing the magnitude of soil suction. The paper highlights the importance of monitoring soil suction in engineering practice for slope stability purposes.
Effect of Environmental Conditions on Stability of an Unsaturated Soil Slope
GeoShanghai International Conference 2010 ; 2010 ; Shanghai, China
2010-05-14
Conference paper
Electronic Resource
English
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