Limitations of Classic Constitutive Soil Models and Their Suitability to Represent Tailings Behaviour

Alexandra Halliday, Cristina Vulpe, Andy Fourie, Alfredo Arenas

Research output: Chapter in Book/Conference paperConference paperpeer-review

Abstract

Three constitutive models were used to numerically represent the behaviour of tailings using finite-element software FLAC 3D. The constitutive models Mohr-Coulomb, Modified Cam Clay and P2PSand were each calibrated for three unique tailings that characterised as predominantly sand, silt or clay. The results of advanced geotechnical laboratory testing, including suites of critical state triaxial testing and consolidation testing were used to calibrate the three constitutive models for the selected tailings. The suitability of each model to represent the key mechanical behaviours that govern tailings responses such as contractive/dilative behaviour, shear strength, pore-pressure response and soil hardening/softening behaviour was assessed. The study showed that constitutive models should be selected based on the material behaviour shown in advanced laboratory testing, rather than merely using the soil classification.

Original languageEnglish
Title of host publicationChallenges and Innovations in Geomechanics - Proceedings of the 16th International Conference of IACMAG - Volume 3
EditorsMarco Barla, Alessandra Insana, Alice Di Donna, Donatella Sterpi
PublisherSpringer Science + Business Media
Pages102-109
Number of pages8
ISBN (Print)9783031128509
DOIs
Publication statusPublished - 2023
Event6th International Conference of the International Association for Computer Methods and Advances in Geomechanics, IACMAG 2022 - Turin, Italy
Duration: 30 Aug 20222 Sep 2022

Publication series

NameLecture Notes in Civil Engineering
Volume288 LNCE
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference6th International Conference of the International Association for Computer Methods and Advances in Geomechanics, IACMAG 2022
Country/TerritoryItaly
CityTurin
Period30/08/222/09/22

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