Banca de DEFESA: Bruno Leite Ramires Saldanha

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Bruno Leite Ramires Saldanha
DATE: 18/08/2023
TIME: 14:00
LOCAL: UnB
TITLE:

"Flow Liquefaction Study on Occurrence in Unsaturated Mining Tailings"


KEY WORDS:

Constitutive Models. Unsaturated Soils. Liquefaction.


PAGES: 96
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Geotécnica
SUMMARY:
The objective of this study is to present the formulation of a constitutive model capable of
reproducing the static liquefaction phenomenon in unsaturated mining tailings. The Unified
Model for Sand and Clay (CASM) expanded to represent unsaturated behavior was
implemented in visual basic programming language. The experimental results of the Stava
Mine tailings were used as input data for calibration and validation of the model. undrained and
isotropic compression simulations were conducted, and the model was able to reproduce a
significant portion of the unsaturated behavior, including: the increase in preconsolidation
stress, the change in the slope of the normal consolidation line, and the wetting collapse
phenomenon. With respect to non-drained behavior, when applying different suction values,
the model was able to reproduce the increase in peak and residual stresses, the post-peak
behavior change, and the existence of a ratio between the average net stress and the matric
suction that increases the resistance to static liquefaction. For these and other reasons, the model
can be considered a good option for representing the static liquefaction phenomenon in
saturated conditions.

COMMITTEE MEMBERS:
Interno - 2161425 - JUAN FELIX RODRIGUEZ REBOLLEDO
Externa à Instituição - Letícia Pereira de Morais
Presidente - 1549489 - MANOEL PORFIRIO CORDAO NETO
Interno - 3132829 - RAFAEL CERQUEIRA SILVA
Notícia cadastrada em: 02/08/2023 10:05
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