Mathematical, Constitutive and Numerical Modelling of Catastrophic Landslides and Related Phenomena

Pastor, M.; Merodo, J. A. Fernández; Herreros, Isabel; Mira, Pablo; González, E.; Haddad, B.; Quecedo, Manuel Pulido; Tonni, Laura; Drempetic, V.

doi:10.1007/s00603-007-0132-0

Cited by 22 publications

(12 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hydrological models can be integrated with slope stability analysis methods to calculate the factor of safety and predict the time and magnitude of landslides (Crosta and Frattini, 2008;Shuin et al, 2012;Aleotti and Chowdhury, 1999;Westen et al, 2006). Combined hydro-mechanical models can roughly be divided into two types: simplified conceptual models (Montrasio and Valentino, 2008;Dai et al, 2002) and numerical models (Stead et al, 2001;Jing, 2003;Brinkgreve et al, 2010;Pastor et al, 2008), and have different levels of complexity depending on the scale and the research purpose.…”

Section: Introductionmentioning

confidence: 99%

Quantification of the influence of preferential flow on slope stability using a numerical modelling approach

Shao

Bogaard

Bakker

et al. 2015

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. The effect of preferential flow on the stability of landslides is studied through numerical simulation of two types of rainfall events on a hypothetical hillslope. A model is developed that consists of two parts. The first part is a model for combined saturated/unsaturated subsurface flow and is used to compute the spatial and temporal water pressure response to rainfall. Preferential flow is simulated with a dual-permeability continuum model consisting of a matrix domain coupled to a preferential flow domain. The second part is a soil mechanics model and is used to compute the spatial and temporal distribution of the local factor of safety based on the water pressure distribution computed with the subsurface flow model. Two types of rainfall events were considered: long-duration, low-intensity rainfall, and shortduration, high-intensity rainfall. The effect of preferential flow on slope stability is assessed through comparison of the failure area when subsurface flow is simulated with the dualpermeability model as compared to a single-permeability model (no preferential flow). For the low-intensity rainfall case, preferential flow has a positive effect on drainage of the hillslope resulting in a smaller failure area. For the highintensity rainfall case, preferential flow has a negative effect on the slope stability as the majority of rainfall infiltrates into the preferential flow domain when rainfall intensity exceeds the infiltration capacity of the matrix domain, resulting in larger water pressure and a larger failure area.

show abstract

Section: Introductionmentioning

confidence: 99%

Quantification of the influence of preferential flow on slope stability using a numerical modelling approach

Shao

Bogaard

Bakker

et al. 2015

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…This geometric characteristic suggests, after a dimensionless analysis is performed, that the decomposition of the velocity field

v

[29] in a vertical consolidation component

v^{c}

and a propagation component

v^{p}

is possible and it is done as follows

v = v^{c} + v^{p}

allowing the description of the landslide evolution as the combination of two different physical phenomena, namely, pore pressure evolution and propagation. Therefore, the mixture initially describe by (1) and (2), can be expressed by the following set of equations

\begin{array}{l} ρ \frac{normald v^{p}}{normald t} = ρ normalb + d i v σ \\ d i v v^{p} = 0 \end{array}

d i v v^{c} = k_{w} \frac{\partial^{2} p_{w}}{\partial x_{3}^{2}}

where (4) governs the propagation of the mixture as an incompressible viscous fluid while (5) governs the evolution of the pore water pressure through a vertical consolidation process.…”

Section: Mathematical Modelmentioning

confidence: 99%

Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides

et al. 2017

View full text Add to dashboard Cite

The choice of a pure cohesive or a pure frictional viscoplastic model to represent the rheological behaviour of a flowslide is of paramount importance in order to obtain accurate results for real cases. The principal goal of the present work is to clarify the influence of the type of viscous model—pure cohesive versus pure frictional—with the numerical reproduction of two different real flowslides that occurred in 1966: the Aberfan flowslide and the Gypsum tailings impoundment flowslide. In the present work, a depth-integrated model based on the v-pw Biot–Zienkiewicz formulation, enhanced with a diffusion-like equation to account for the pore pressure evolution within the soil mass, is applied to both 1966 cases. For the Aberfan flowslide, a frictional viscous model based on Perzyna viscoplasticity is considered, while a pure cohesive viscous model (Bingham model) is considered for the case of the Gypsum flowslide. The numerical approach followed is the SPH method, which has been enriched by adding a 1D finite difference grid to each SPH node in order to improve the description of the pore water evolution in the propagating mixture. The results obtained by the performed simulations are in agreement with the documentation obtained through the UK National Archive (Aberfan flowslide) and the International Commission of large Dams (Gypsum flowslide).

show abstract

“…theory, using elastoplastic approach (see for instance Fernandez Herrores et al, 2002;Pastor et al, 2013;Pastor et al, 2004) or the second-order work (Buscarnera & Prisco, 2012;Nicot, Darve, & Dat Vu Khoa, 2007). The use of elastoplastic approach by Frenadez et al (2004) with a generalised plasticity provides a unified formulation for both initiation and propagation phases.…”

Section: Introductionmentioning

confidence: 99%

Analysis of slope movement initiation induced by rainfall using the Elastoplastic Barcelona Basic Model

Jamei

Guiras

Olivella

2015

European Journal of Environmental and Civil Engineering

View full text Add to dashboard Cite

In some arid and semi-arid regions, different types of infrastructure assets suffer from degradation of the roads, the embankment failures, erosion due to cyclic hydraulic actions and the effects of rainfall infiltration on slopes. Typical cases, such as the national roads in the north-west of Tunisia (Béja city) have been affected dramatically. Recent landslide is manifested in this region, especially in a plastic clay soil. Stability problems are caused by soil saturation and the presence of abundant cracks which are developed after a long dry summer. In fact, due to geotechnical problems, the annual loss due to the damage is estimated at $1 million in Béja area (30 km 2 ). The effect of rainfall infiltration into the unsaturated clay during wet seasons characterised by either long duration low intensity rain or short duration high intensity rain have been analysed. The elastoplastic Barcelona Basic Model (BBM) has been used and soil movements leading to slope failure were calculated according to the unsaturated state evolution. The effects of cyclic hydraulic paths on the yield function have also been investigated. The yield function evolution depends on the cohesion and the apparent consolidation stress variations. The numerical calculations were evaluated against the field measurement displacements.

show abstract

Mathematical, Constitutive and Numerical Modelling of Catastrophic Landslides and Related Phenomena

Cited by 22 publications

References 24 publications

Quantification of the influence of preferential flow on slope stability using a numerical modelling approach

Quantification of the influence of preferential flow on slope stability using a numerical modelling approach

Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides

Analysis of slope movement initiation induced by rainfall using the Elastoplastic Barcelona Basic Model

Contact Info

Product

Resources

About