Modeling of flow liquefaction and large deformations in tailings dams using material point method
department or school: Applied Science, Faculty of
department or school: Civil Engineering, Department of
data provider: DSpace
degree campus: UBCV
creator: Lino Ramírez, Erick Alexander
issued: 2023-10-31T07:00:00Z
issued: 2021
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: The release of tailings and impounded water after dam breaches has had catastrophic consequences for the population and the environment. These events have gained the attention of the geotechnical community because they occur without warning, causing massive damage. Flow liquefaction of tailings materials has been the cause of instability of recent tailings dam failures. These disasters were initiated by the triggering event that led the system to experience flow liquefaction and large deformations. To predict the evolution of flow-type instabilities, designers usually carry out dam-break analyses that rely on fluid mechanics methods since conventional slope stability methods such as limit equilibrium and finite elements only provide information until the onset of failure. Such decoupling of the geomechanics-based analysis for stability and fluid mechanics-based analysis for dam-break is not desirable, given the recent advances in critical state soil mechanics, strain-softening material models, and large deformation analysis methods. Hence, there is a need to develop analyses that can simulate the failure initiation and the post-failure stage observed during tailings dam disasters. In the present study, the triggering and the subsequent motion have been analyzed in a unified framework for the case of a saturated upstream tailings dam. Two different triggers are considered: the increment of pore water pressure and the sudden loss of strength in the foundation. A critical state bounding surface plasticity model is used for the tailings. This model can reproduce the contractive brittle behavior of loose saturated tailings. A two-phase single-point formulation of the material point method (MPM) has been considered to simulate the whole deformation process. This method has recently increased its popularity as a tool to deal with large deformation problems in geotechnical engineering. The influence of the initial void ratio on system performance is evaluated. The current s…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/80100
note: Modeling of flow liquefaction and large deformations in tailings damsusing material point methodbyErick Alexander Lino RamírezB.Sc. Universidad Nacional de Ingeniería, 2012A THESIS SUBMITTED IN PARTIAL FULFILLMENTOF THE REQUIREMENTS FOR THE DEGREE OFMaster of Applied ScienceinTHE FACULTY OF GRADUATE AND POSTDOCTORAL STUDIES(Civil Engineering)The University of British Columbia(Vancouver)October 2021© Erick Alexander Lino Ramírez, 2021The following individuals certify that they have read, and recommend to the Faculty of Graduateand Postdoctoral Studies for acceptance, the thesis entitled:Modeling of flow liquefaction and large deformations in tailings dams using materialpoint methodsubmitted by Erick Alexander Lino Ramírez in partial fulfillment of the requirements for thedegree of Master of Applied Science in Civil Engineering.Examining Committee:Dr. Mahdi Taiebat, Civil Engineering, UBCSupervisorDr. Arcesio Lizcano, SRK Consulting CanadaAdditional ExamineriiAbstractThe release of tailings and impounded water after dam breaches has had catastrophic consequencesfor the population and the environment. These events have gained the attention of the geotechni-cal community because they occur without warning, causing massive damage. Flow liquefactionof tailings materials has been the cause of instability of recent tailings dam failures. These disas-ters were initiated by the triggering event that led the system to experience flow liquefaction andlarge deformations. To predict the evolution of flow-type instabilities, designers usually carry outdam-break analyses that rely on fluid mechanics methods since conventional slope stability meth-ods such as limit equilibrium and finite elements only provide information until the onset of fail-ure. Such decoupling of the geomechanics-based analysis for stability and fluid mechanics-basedanalysis for dam-break is not desirable, given the recent advances in critical state soil mechanics,strain-softening material models, and large def…
has type: Thesis/Dissertation
date issued: 2021-11
is shown at: 10.14288/1.0402646
language: eng
degree discipline: Civil Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Taiebat, Mahdi
type: Text
identifier URI: http://hdl.handle.net/2429/80100