Banca de DEFESA: Flávio da Silva Ornelas

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : Flávio da Silva Ornelas
DATE: 20/06/2024
TIME: 16:00
LOCAL: Sala Teams (On-line)
TITLE:

Impact containment barriers with geotextile tubes

KEY WORDS:

Geotube; Barriers, Impact, Debris Flow

PAGES: 108
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Geotécnica
SUMMARY:

 

Geotechnical engineering is constantly seeking to develop technologies, update and optimize safe structures so that various events do not claim lives or cause major environmental and financial damage. Recently, tragic tailings dam collapses in Brazil have caused deaths and major destruction, and the need for technological development to prevent damage to people and the environment.
Brazilian tailings dams are in a situation of uncertainty due to new legislation that even requires decommissioning, an activity that involves many problems and where the risk of failure is the main one. An impact containment barrier built downstream of these dams can be effective in containing the flow of debris in the event of failure. Geotextile tubes in a new approach, is used in this research as an impact containment barrier option that has major advantages in execution, cost and safety. The technology is versatile and can bring many benefits such as the reuse of tailings or filling with low-energy or reused materials.
In this research, geotextile tubes were tested as containment barriers filled with mining tailings, free of fixation and with reduced friction, experimenting with impacts in reduced models to find the inertial resistance. The safety factor for the stability of the structure was constructed using an equation which is the ratio between the self-weight of the dam structure and its coefficient of static friction and the impact pressure, where the data showed an adequate correlation which suggests that it is viable to withstand impacts and mitigate risks. Finally, design criteria for geotextile tube containment barriers and the feasibility of using them on a large scale were presented.

COMMITTEE MEMBERS:
Externa à Instituição - MARIANA RAMOS CHRUSCIAK - UFRR
Externo à Instituição - BRUNO GUIMARÃES DELGADO - VALE
Interno - 1805002 - ANDRE LUIS BRASIL CAVALCANTE
Interno - 2161425 - JUAN FELIX RODRIGUEZ REBOLLEDO
Presidente - 3132829 - RAFAEL CERQUEIRA SILVA