Downhill progressive landslides in long natural slopes: triggering agents and landslide phases modeled with a finite difference method

Bernander, Stig; Kullingsjö, Anders; Gylland, Anders Samstad; Bengtsson, Per-Evert; Knutsson, Sven; Pusch, Roland; Olofsson, Jan; Elfgren, Lennart

doi:10.1139/cgj-2015-0651

Cited by 26 publications

(23 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Failures of the newly generated backscarps occur until a final stable scarp is formed. The translational progressive landslide develops in a very different way; that is, a shear surface parallel to the ground surface develops first and then the soil mass above the formed failure surface moves downhill (Bernander et al 2016;Wang 2019). In a spread, a shear surface along the ground surface forms as that in a translational progressive landslide.…”

Section: Introductionmentioning

confidence: 99%

A case study and implication: particle finite element modelling of the 2010 Saint-Jude sensitive clay landslide

et al. 2019

View full text Add to dashboard Cite

Modelling of landslides in sensitive clays has long been recognised as a challenge. The strength reduction of sensitive clays when undergoing plastic deformation makes the failure proceed in a progressive manner such that a small slope failure may lead to a series of retrogressive failures and thus to an unexpected catastrophic landslide. The clay in the entire process may mimic both solid-like (when it is intact) and fluid-like (when fully remoulded, especially for quick clays) behaviours. Thereby, a successful numerical prediction of landslides in sensitive clays requires not only a robust numerical approach capable of handling extreme material deformation but also a sophisticated constitutive model to describe the complex clay behaviour. In this paper, the particle finite element method (PFEM) associated with an elastoviscoplastic model with strain softening is adopted for the reconstruction of the 2010 Saint-Jude landslide, Quebec, Canada, and detailed comparisons between the simulation results and available data are carried out. It is shown that the present computational framework is capable of quantitatively reproducing the multiple rotational retrogressive failure process, the final run-out distance and the retrogression distance of the Saint-Jude landslide. Furthermore, the failure mechanism and the kinematics of the Saint-Jude landslide and the influence of the clay viscosity are investigated numerically, and in addition, their implications to real landslides in sensitive clays are discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

A case study and implication: particle finite element modelling of the 2010 Saint-Jude sensitive clay landslide

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Upslope loading might significantly affect the failure of slopes, which has been observed in the field and verified with numerical modeling for monotonic loading (Bernander 2000;Bernander et al 2016;Wang et al 2013;Dey et al 2016a;Wang and Hawlader 2017) and dynamic loading (Seed and Wilson, 1967;Barnhardt et al 2000;Kourkoulis et al 2010). Figure 10 shows the formation of failure planes when a uniform surcharge q = 80 kPa exists at 100 m distance from the crest.…”

Section: Slope-iii: With An Upslope Distributed Loadmentioning

confidence: 52%

Large-deformation finite-element modelling of earthquake-induced landslides considering strain-softening behaviour of sensitive clay

et al. 2019

View full text Add to dashboard Cite

Large-scale landslides in sensitive clays cannot be explained properly using the traditional limit equilibrium or Lagrangian-based finite-element (FE) methods. In the present study, dynamic FE analysis of sensitive clay slope failures triggered by an earthquake is performed using a large-deformation FE modelling technique. A model for post-peak degradation of undrained shear strength as a function of accumulated plastic shear strain (strain-softening) is implemented in FE analysis. The progressive development of “shear bands” (the zone of high plastic shear strains) that causes the failure of a number of soil blocks is simulated successfully. Failure of a slope could occur during an earthquake and also at the post-quake stage until the failed soil masses come to a new static equilibrium. Upslope retrogression and downslope runout of the failed soil blocks are examined for varying geometries and soil properties. The present FE simulations can explain some of the conditions required for different types of seismic slope failure (e.g., spread, flowslide or monolithic slides) to be triggered, as observed in the field.

show abstract

“…Numerical simulation is becoming an important approach for landslide research, especially its stability analysis, failure mechanisms and motion processes. For instance, mesh-based methods, such as the finite difference method (FDM) and the finite element method (FEM) have been widely applied in slope stability analysis (Ding et al, 2012;Chen et al, 2019), failure mechanism analysis (Maihemuti et al, 2016;Xiong et al, 2018), and failure process simulation (Bernander et al, 2016;Tang et al, 2017). Recently, mesh-free methods have been rapidly developed and widely applied due to their unique capability and advantages to handle the problems with large deformation and free surface.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on the kinetic characteristics of the Yigong landslide in Tibet, China

Dai

Wang

Yang

et al. 2020

Preprint

View full text Add to dashboard Cite

Abstract. To analyse the kinetic characteristics of a rapid landslide that occurred on 9 April 2000 in Tibet, China, a meshfree numerical method named Smoothed Particle Hydrodynamics (SPH) is introduced, and two-dimensional and three-dimensional models are established in this work. Based on the numerical simulation, the landslide motion process is reproduced and the kinetic characteristics are analysed combined with the field investigation data. In the kinetic analysis, the landslide velocity, run-out distance, landslide accumulation, and energy features are discussed. Simulation results show that the landslide mass undergoes an acceleration stage after failure, then the kinetic energy dissipates gradually due to the friction and collision during the landslide propagation. Finally, the landslide mass blocks the Yigong river and forms a huge landslide dam and an extensive barrier lake. The peak velocity is calculated to be about 100 m/s, and the run-out distance is approximately 8,500 m. The simulation results basically match the data measured in field, thus verifying the good performance of the presented SPH model. This approach can provide a new way to predict hazardous areas and estimate the hazard intensity of rapid landslides.

show abstract

Downhill progressive landslides in long natural slopes: triggering agents and landslide phases modeled with a finite difference method

Cited by 26 publications

References 18 publications

A case study and implication: particle finite element modelling of the 2010 Saint-Jude sensitive clay landslide

A case study and implication: particle finite element modelling of the 2010 Saint-Jude sensitive clay landslide

Large-deformation finite-element modelling of earthquake-induced landslides considering strain-softening behaviour of sensitive clay

Numerical investigation on the kinetic characteristics of the Yigong landslide in Tibet, China

Contact Info

Product

Resources

About