Unsaturated Infinite Slope Stability Considering Surface Flux Conditions

Travis, Quentin B.; Houston, Sandra L.; Marinho, Fernando A. M.; Schmeeckle, M. W.

doi:10.1061/(asce)gt.1943-5606.0000301

Cited by 53 publications

(23 citation statements)

References 24 publications

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“…However, matric suction profiles deepen considerably from 1.2 to 1.8 m for the same rainfall flux which points, overall, to reduced loss of matric suction at the deep soil colluviums. In shallow soil depths, matric suction may increase, decrease or remain constant (Travis et al 2010) and similar interpretation for matric suction distribution are found in other studies such as Fredlund (1987), Tsaparas et al (2002), Zhan and Ng (2004), Lee et al (2009) and Kassim et al (2012). In case of much deeper soil colluviums (i.e., [2 m), however, the positive porewater pressure always increases with increase in soil depth and the relationship between porewater pressure increase and soil depth is linear (Fredlund and Rahardjo 1993).…”

Section: Influence Of Soil Depthmentioning

confidence: 99%

Numerical analysis on influence of principal parameters of topography on hillslope instability in a small catchment

et al. 2014

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This study was conducted to identify the influence of three principal parameters constituting topography (slope inclination, soil depth, and slope length) on hillslope instability in a small catchment, known as Higashifukubegawa of Shikoku Island, western Japan. The typhoon rainfall of 19-20 October 2004 was significant in causing a total of seven slope failures in the catchment, though other rainfall events of various intensities in the same year did not cause failure. To understand the influence of the three principal parameters, numerical modeling of seepage and slope stability was performed in slope profiles constructed by varying the three parameters across their permissible range prepared from the seven slope failures of Higashifukubegawa in GeoStudio (GeoStudio Tutorials includes student edition lessons, Geo-Slope International Ltd., Calgary, 2005 v.4). The change in porewater pressure and slope mass weight due to variation in values of principal parameters was used to interpret the change in factor of safety or instability. The results showed that (1) instability increases with increase in the values of all three selected parameters across their range in Higashifukubegawa with remarkable decreasing trend in factors of safety, (2) slope inclination and soil depth were observed to affect instability through change in both unsaturated zone moisture content and mobilizing force of slope mass, (3) but with slope length, the unsaturated zone moisture content was not found to change considerably which implies that the instability due to slope length is mainly governed by change in slope mass weight. Overall, this study has dealt in great detail with how hillslope instability changes with principal parameters of topography under the same simulating conditions of hydrological and geo-mechanical parameters.

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Section: Influence Of Soil Depthmentioning

confidence: 99%

Numerical analysis on influence of principal parameters of topography on hillslope instability in a small catchment

et al. 2014

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“…The factor of safety, F s , can therefore be written as .4 in slightly different forms, for example, using the suction stress s s (Lu and Likos, 2004) instead of suction (Lu and Griffiths, 2004;Lu and Godt, 2008), or considering y and f b as functions of H (Travis et al, 2010) or expressed the equation in terms of pressure head (Iverson, 2000;Cho and Lee, 2002;Muntohar and Liao, 2009). …”

Section: General Equation Of Factor Of Safety For Infinite Unsaturatementioning

confidence: 99%

Stability Analysis of Slope under Rainfall Infiltration Based on Limit Equilibrium

2016

Rainfall-Induced Soil Slope Failure

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“…The change in soil friction angle with depth, which was often omitted in the conventional slope stability analysis, can be considered in this framework. Travis et al (2010) developed the analytical solutions for the matrix suction and degree of saturation profiles under steady-state unsaturated infiltration flow, and coupled them with the equations of safety factor for an infinite slope. The general equation for the factor of safety for an infinite slope is…”

Section: Limit Equilibrium Methodsmentioning

confidence: 99%

Stability analysis of rainfall-induced slope failure: a review

Zhang

et al. 2011

Proceedings of the Institution of Civil Engineers - Geotechnica

263

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Rainfall is one of the most significant triggering factors for slope failures in many regions around the world.Numerous research studies have been conducted to investigate infiltration of rainwater into a slope, and the effect of water infiltration on slope stability. In this paper, a review of existing research on infiltration analysis and slope stability analysis under rainfall infiltration is presented. Studies on infiltration analysis with conceptual models, analytical analysis and numerical modelling are first reviewed. The typical pore water pressure profiles in the slope are then discussed. Subsequently, recent developments in analyses of slope instabilities under rainfall conditions using the limit equilibrium method and coupled hydro-mechanical modelling are summarised, and major findings on critical hydrological factors related to rainfall-induced landslides are summarised and discussed. Finally, several research topics are suggested for further study.

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Unsaturated Infinite Slope Stability Considering Surface Flux Conditions

Cited by 53 publications

References 24 publications

Numerical analysis on influence of principal parameters of topography on hillslope instability in a small catchment

Numerical analysis on influence of principal parameters of topography on hillslope instability in a small catchment

Stability Analysis of Slope under Rainfall Infiltration Based on Limit Equilibrium

Stability analysis of rainfall-induced slope failure: a review

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