Recent disastrous tailings dam failures have heightened public concerns about the safety of these structures. Typically, are disposed as a slurry in loosely saturated state, making them susceptible to static liquefaction. The widely used limit equilibrium method for analysing dams may overlook potential and is incapable simulating static-liquefaction-type failures. This paper presents simulations initiation progressive failure within finite element framework, using well-described Brazil...

A numerical model is set up to compare CEL and MPM simulating the densification of dry sand using deep vibration compaction method. This method densifies loose sands by means shear deformation processes imparted horizontal vibrations vibrator probe at required soil depth. Both methods are capable simulate large without drawbacks mesh distortion. hypoplastic constitutive used characterize stress-strain behaviour sand. Modelling parameters in both domains were tried keep similar possible...

Vibroflotation is an established ground improvement technique for granular materials. It densifies loose sands by means of shear and compressive deformation processes imparted the horizontal vibrations a vibrator probe at required soil depth. The field experience empirical relations used design vibroflotation prompt further study analysis. Numerical simulations method help provide insight into process. A coupled Eulerian–Lagrangian framework was to model compaction process modelled based on...

Various testing methods, such as the static triaxial test, cyclic resilient modulus repeated-load California Bearing Ratio (CBR) and oedometer were explored to characterize pavement granular materials. Using an experimental data set of stress–strain response a typical material was collected. The values obtained from tests various compared. feasibility predicting behavior using hardening soil model analyzed. Hardening parameters calibrated simple test data. effectiveness in then verified by...

Abstract A numerical model based on the finite element framework was developed to predict seismic response of saturated sand under free-field conditions. The used a non-linear coupled hypoplastic u-p formulation simulate behaviour sand. constitutive implemented as user-defined routine in commercial ABAQUS explicit 6.14. Results centrifuge experiments simulating site layered system were validate results. test consisted three-layered subjected one-dimensional shaking at base. set-up equipped...

A numerical model of a shallow foundation resting on sand is set up to simulate the liquefaction partially saturated subjected confined transient loading. The observed undergo large settlements due sand. In order analyze feasibility deep vibration compaction in mitigation, was and later same compacted with It that technique reduced drastically, suggesting can be effectively used as mitigation measure.The method includes densification loose sands by means shear deformation processes imparted...

Vibroflotation includes densification of loose sands by means shear deformation processes imparted horizontal vibrations vibrator probes. 1g model tests replicating the vibroflotation process were conducted using a to identify online compaction control parameters. The effectiveness was evaluated cone penetration test. An accelerometer and trigger installed in measure amplitude phase angle eccentric mass during compaction. variation studied it observed that reduced with increasing density...

Loose saturated sands when subjected to seismic loading develop high excessive pore water pressures eventually leading liquefaction of the soil. The deep vibration compaction method includes densification loose by means shear deformation processes imparted horizontal vibrations vibrator probe. In order study feasibility for mitigation, a numerical model is created in finite element framework. methodology consisted on performing FE simulations using non-linear coupled hypoplastic based u-p...