Rainfall-induced slope failure considering variability of soil properties

Zhang, L. L.; Zhang, L. M.; Tang, Wilson H.

doi:10.1680/geot.2005.55.2.183

Cited by 122 publications

(24 citation statements)

References 12 publications

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“…The impact of uncertainty in the soil properties on the SF is relatively easily quantified using statistical methods [15], and has been explored by different authors [7,9,11,18,19]. This includes treatment of uncertainty in the porosity [20], specific weight [11,17], cohesion [11,17], and friction angle [11,17] of the soil mantle, and the spatial variability of the hydraulic conductivity [7,20]. Data errors arise from improper, incomplete and/or inaccurate measurement methods [15].…”

Section: Introductionmentioning

confidence: 99%

The role of uncertainty in bedrock depth and hydraulic properties on the stability of a variably-saturated slope

Gomes

Vrugt

Vargas

et al. 2017

Computers and Geotechnics

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a b s t r a c tWe investigate the uncertainty in bedrock depth and soil hydraulic parameters on the stability of a variably-saturated slope in Rio de Janeiro, Brazil. We couple Monte Carlo simulation of a threedimensional flow model with numerical limit analysis to calculate confidence intervals of the safety factor using a 22-day rainfall record. We evaluate the marginal and joint impact of bedrock depth and soil hydraulic uncertainty. The mean safety factor and its 95% confidence interval evolve rapidly in response to the storm events. Explicit recognition of uncertainty in the hydraulic properties and depth to bedrock increases significantly the probability of failure.

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Section: Introductionmentioning

confidence: 99%

The role of uncertainty in bedrock depth and hydraulic properties on the stability of a variably-saturated slope

Gomes

Vrugt

Vargas

et al. 2017

Computers and Geotechnics

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“…[5,14,17,20,66]). These coupled hydro-mechanical studies are based on different constitutive models for describing the swelling behavior that use different definitions of stress state variables within the framework of unsaturated soil mechanics.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the nonlinear elastic stress-strain relationship based on two stress state variables are utilized by some researchers (e.g. [5,17,66]), while, the elasto-viscoplastic and elasto-plastic model considering the plastic strains based on effective stress principle has been used by other researchers (e.g. [11,14,20]).…”

Section: Introductionmentioning

confidence: 99%

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Hydro-mechanical coupling effect on surficial layer stability of unsaturated expansive soil slopes

Vanapalli

2015

Computers and Geotechnics

116

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“…Landslides triggered by rain is well-known (Fukuoka 1980;Gostelow 1991;Anderson and Sitar 1995;Zhang et al 2005;Tsai and Chen 2010); however, the mechanisms that give rise to an anomalous density of landslides on landscapes similar to Iva Valley are less known. The geomorphologic setting of Iva Valley is probably controlled by the topography, geotechnical, and hydrogeologic properties of the dominant lithologies, which, in turn, control the mode of slope failures.…”

Section: Icl/ipl Activitiesmentioning

confidence: 99%

The study of the factors controlling rainfall-induced landslides at a failure-prone catchment area in Enugu, Southeastern Nigeria using remote sensing data

Igwe

2015

Landslides

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Using remote sensing data and geographic information system (GIS) analytical techniques, we investigated instability at Iva Valley where there is an anomalous concentration of landslide scars. The area has a fairly rugged topography caused to a large extent by the headward erosion by the east-flowing Ekulu River. Mass wasting is more pronounced on the poorly consolidated sandstone (Ajali) formation which (as a major aquifer) serves as the source of the Ekulu River and its tributaries. At the lower portion of the formation and the uppermost part of shale (Mamu) formation (fractured in some places), inter-bedded thin mudstone layers provide the sandstones additional resistance to erosion, which however leads to steeper slopes and very deep and narrow stream channels. Digital elevation models show that the landforms are dominantly lowlands and lowhills with landslides concentrated on river tributaries where failures on the incised slopes create further instability. The overlying sandstone formation seems inherently unstable because of its semi-consolidated and friable nature. The fractures (orientated NE-SW) in the underlying shale formation and the occasional removal of lateral support by mining or road construction probably aggravate the instability. Additional stress on the unstable sandy mass resulting from increase in self-weight and pore pressure during rainfall readily induces failure, which then steepens the slopes and renders them vulnerable to more collapse behaviors that create clusters of scars. The results show good agreement with field observations and literature data indicating the importance of remote sensing analysis, ASTER, and SRTM imagery in geomorphologic interpretations.

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Rainfall-induced slope failure considering variability of soil properties

Cited by 122 publications

References 12 publications

The role of uncertainty in bedrock depth and hydraulic properties on the stability of a variably-saturated slope

The role of uncertainty in bedrock depth and hydraulic properties on the stability of a variably-saturated slope

Hydro-mechanical coupling effect on surficial layer stability of unsaturated expansive soil slopes

The study of the factors controlling rainfall-induced landslides at a failure-prone catchment area in Enugu, Southeastern Nigeria using remote sensing data

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