Journal ArticleDOI
Numerical modelling of rainfall effects on the stability of soil slopes
TLDR
In this paper, the effects of rainfall intensity and duration on pore pressure generation, degree of saturation, slope stability and shear strain increment during rainfall event were investigated in unsaturated-saturated soil.Abstract:
High intensity rainfall leads to slope failures that are initially unsaturated. Rainfall is the main triggering factor for the slope failure; however, the denseness of the soil with associated soil properties has not received adequate attention on the stability of the slopes. In this study, the finite difference analysis of transient water flow through unsaturated–saturated soil is carried out to study the effects of rainfall intensity and duration on pore pressure generation, degree of saturation, slope stability and shear strain increment during rainfall event. A parametric sensitivity analysis is performed considering three rainfall intensities applied over the soil slopes consisting of three different soil states namely loose, medium and dense. Results indicate that the rainfall affects the stability of loose and medium soil slopes much as compared to the dense soil slope. The rain-induced instability is much more in loose soil slope as compared to the medium soil slope.read more
Citations
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Effect of permeability on surficial stability of homogeneous slopes. closure
R. W. Day,D. Pradel,G. Raad +2 more
TL;DR: In this article, a study of the equations governing seepage and rainfall data in Southern California suggests that permeability plays an important role in the surficial stability of slopes, and that slopes with a low permeability are more prone to develop the conditions leading to a surficial failure mechanism.
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Transport behaviors of plastic particles in saturated quartz sand without and with biochar/Fe3O4-biochar amendment.
TL;DR: The results of this study indicate that magnetic biochar can be potentially applied to immobilize plastic particles in terrestrial ecosystems such as in soil or groundwater.
Journal ArticleDOI
The Vaiont Slide, a geotechnical analysis based on new geologic observations of the failure surface: Book review
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Reliability analysis of rapid drawdown of an earth dam using direct coupling
TL;DR: In this article, the authors combine seepage analysis with limit equilibrium analysis to investigate the safety of an earth dam over time and during drawdown, which is accomplished by directly coupling the deterministic software packages Seepage/W and Slope/W with the StRAnD reliability software.
References
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Journal ArticleDOI
A closed-form equation for predicting the hydraulic conductivity of unsaturated soils
van Genuchten,M. Th. +1 more
TL;DR: Van Genuchten et al. as mentioned in this paper proposed a closed-form analytical expression for predicting the hydraulic conductivity of unsaturated soils based on the Mualem theory, which can be used to predict the unsaturated hydraulic flow and mass transport in unsaturated zone.
Journal ArticleDOI
A new model for predicting the hydraulic conductivity of unsaturated porous media
TL;DR: In this article, a simple analytic model is proposed which predicts the unsaturated hydraulic conductivity curves by using the moisture content-capillary head curve and the measured value of the hydraulic conductivities at saturation.
Journal ArticleDOI
Capillary conduction of liquids through porous mediums
TL;DR: In this article, the authors used Darcey's law to derive the equation K∇2ψ+∇K·∇ψ +g∂K/∂z=−ρsA∆ψ/∆t for the capillary conduction of liquids in porous mediums.
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Foundation analysis and design
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Journal ArticleDOI
Studies on Soil Phyics.
W. Heber Green,G. A. Ampt +1 more
TL;DR: In this article, the authors proposed that the measurement of S, Pα, Pω and K is of more importance than, and should replace, the determination of the sizes of the soil particles as in the usual "mechanical analysis" of soils.
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