Programa de Pós-Graduação em Engenharia de Barragem e Gestão Ambiental - PEBGA/NDAE/Tucuruí

URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/9395

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Agora exibindo 1 - 8 de 8

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Análise da adição de resíduos siderúrgicos em matrizes cimentícias para concreto massa
(Universidade Federal do Pará, 2021-12-17) BONFIM, Francirene Pereira; GOUVEIA, Fernanda Pereira; http://lattes.cnpq.br/1772072130947378
During the steel production process, industrial waste is generated, including granulated blast furnace slag and balloon powder, generated in the pig iron production stage; and electric arc furnace dust, obtained in the production stage of the steelworks. In the northern region, the highlight in steel production is SINOBRAS - Siderúrgica Norte Brasil SA, located in the municipality of Marabá-PA, which also experiences the problem of waste disposal, and therefore has been supporting partnerships with educational institutions in the region for expansion of destination alternatives. Thus, this research aims to evaluate the influence of waste from the SINOBRAS industry, granulated blast furnace slag (GBFS), balloon powder (BP) and electric arc furnace dust (EAFD) in cementitious matrices, predicting applications in mass concrete for dams . The research methodology was carried out in two stages, the first being directed towards the study of waste, analyzing its physicochemical and mineralogical characteristics, the pozzolanicity potential according to ABNT NBR 12653:2015, and classification according to the type of solid waste according to ABNT NBR 10004:2004. The second stage of the methodology comprised the analysis of cement matrices composed of the residues, combined with GBFS (GBFS70+BP30; GBFS50+EAFD50), in order to increase the potential performance of the properties verified for mass concrete, with compressive strength tests being carried out, setting times, heat of hydration and alkali-aggregate reaction. It was concluded in the residue study stage that BP and EAFD did not present pozzolanic properties, indicating that they are not interesting for applications of cementitious materials. As for the classification, the GBFS and the BP were classified as class IIA waste - non-hazardous and non-inert, while the EAFD was classified as class I - hazardous. In the second stage of the study, the EAFD combined with the GBFS showed pozzolanicity and the BP, even after combination, remained non-pozzolanic. Evaluating the combined cementitious matrices, the (GBFS50+EAFD50) obtained satisfactory results in all properties, since it promoted a reduction of heat of hydration by 7% and, consequently, an increase in setting times (about 6 hours), and mitigation of expansion reactions, in aggregates gravel and sand by 49%. and 75% respectively. Therefore, the use of the matrix GBFS50+EAFD50, in the studied content, can be a technically viable alternative for applications in mass concrete for dams, being necessary, however, to advance in the research, aiming to produce the concrete traces composed by the matrix combined (GBFS50+EAFD50).
Acesso aberto (Open Access)
Análise das ações de resposta ao cenário de rompimento de barragem de Tucuruí no contexto do PAE e PLANCON
(Universidade Federal do Pará, 2024-09-10) SILVA, Francisco Júnior Nascimento da; GOUVEIA, Fernanda Pereira; http://lattes.cnpq.br/1772072130947378
As a result of the latest accidents involving the dam collapse scenario in Brazil and the strong demand from society and supervisory bodies demanding more safety in dam projects, Eletronorte, responsible for HPP Tucuruí, in 2017 prepared the Safety Plan, and in 2023, together with the municipalities located in the ZAS (Self-rescue Zone), it consolidated the integration of Emergency and Contingency Plans. In this sense, this work aimed to analyze the response actions to the Tucuruí dam collapse scenario in the context of municipalities located in ZAS. The methodological steps used to achieve the results were as follows: Characterize the Tucuruí HPP and the municipalities located in the ZAS (Tucuruí and Breu Branco); Description of the history of preparation and integration, PAE-UHE Tucuruí and PLANCONS of the ZAS municipalities; Evaluate the structuring of COMDECs in the ZAS municipalities, based on the criteria of the COMDECs Diagnostic Report in Brazil and Evaluate the operational logistics of the SCI (Incident Command System) defined in the PLANCONs of Tucuruí and Breu Branco. The results revealed that COMDECs are deficient in terms of training, and in Tucuruí, agents need additional training that meets the thematic axes offered by the National Civil Protection and Defense System – SINPDEC. At COMDEC Breu Branco, a lack of training for all members was identified, with courses being carried out only by the coordination. The financial resources verified to support COMDECs' actions are only allocated in cases of occurrences and there is no preventive financial planning in both municipalities. In terms of infrastructure, COMDEC in Breu Branco is not capable of operating in this emergency scenario, as it has limitations in terms of response support from the 8th GBM. Finally, this study presented, for the first time, the weaknesses observed in the context of the collapse of the Tucuruí dam, in terms of the operationalization of the PAE-PLANCONs in the ZAS municipalities, demonstrating that the COMDECS need better structuring and that the Plans must undergo planning adjustments, aiming for better effectiveness in response actions, which can reduce the vulnerability of the population in the post-disaster period.
Acesso aberto (Open Access)
Aplicação da ferramenta de risco FMEA para análises dos modos de falha de uma barragem de terra: estudo de caso Projeto Formoso do Araguaia-TO
(Universidade Federal do Pará, 2023-05-15) SANTOS, Andreia Arruda; GOUVEIA, Fernanda Pereira; http://lattes.cnpq.br/1772072130947378
The Formoso River Project, located in the state of Tocantins, is the largest irrigation project in Latin America and its structures, made up of three dams, have worried the supervisory body due to the compromised state of conservation of these structures, with evidence of pathologies and anomalies at various points. The state government, which is the developer of the dams, in 2012 even contracted revitalization projects for the enterprise, but to date the works have not been carried out, which makes the safety of the dams more vulnerable. The general objective of the research is to analyze the risk situation of the Calumbi II dam, which makes up the Rio Formoso irrigation project, through the application of the FMEA (Failure Mode and Effects Analysis) risk tool, identifying the most likely failure modes and with greater potential. Other objectives would be: the description of the interventions recommended by the consultancy hired by the entrepreneur and the critical analysis of the lack of dam safety management. The research methodology was based on four stages: a) characterization of the Rio Formoso Project and the case study dam; b) survey of anomalies and pathologies found in the dam; c) application of the FMEA risk tool and d) critical analysis of the dam's safety management case study. The results indicated that the Calumbi II dam presents several pathologies and anomalies (presence of large trees and shrub vegetation on the crest, retraction cracks, erosion and water surges on the slopes), and that despite the dam operating at minimum levels, failures may occur. The FMEA tool demonstrated that the highest priority failure mode would be upstream slope instability (NPR=336), secondly, failure due to piping (NPR=320) and thirdly, but more remote, failure due to dam overtopping ( NPR=144). From the aspect of the analysis of the safety management of the Calumbi II Dam, the vulnerability of the enterprise was concluded, since the dam does not have a PSB or PAE, it does not have installed instrumentation, there is no professional responsible for safety, it does not have studies of risk assessments, does not receive regular periodic inspections by the supervisory body.
Acesso aberto (Open Access)
Dosagem experimental de concreto massa com adição de sílica ativa aplicado em barragem
(Universidade Federal do Pará, 2017-11-10) SOUZA, Grazielle Tigre de; GOUVEIA, Fernanda Pereira; http://lattes.cnpq.br/1772072130947378
The study of concrete dosage for large constructions, specifically of dams, has its own peculiarities due to the large volumes involved, intensifying the care with the supply and quality of materials used for these concretes, compositions with pozzolan additions are generally used in order to reduce the heat of hydration. In this sense, the main objective of this research is the elaboration of a mix design of concrete with the substitution of 8% of the cement per silica fume, the experimental study of the mix design was based on the Method of the Fineness Module of the Aggregates. To meet the proposal of this research, the methodology based primarily on the characterization of concrete constituent materials (fine and coarse aggregates, and silica fume), concrete mix design study by the Method of the Fineness Module (MFM) and subsequent analysis of the properties of the concrete mass obtained, making it possible to elaborate the concrete mix design, according to the requirements specified in the design of hydroelectric power plant structures. In this sense, with regard to the characterization of the aggregates, the results demonstrated the feasibility of the use of these in the production of concrete for dams. In relation to cement and silica fume the characteristics of these materials attend the normative requirements. The experimental dosage based on the MFM method, made it possible to compose the dosage graphs needed to define the mix design of concretes and consequently the verification of their applications in dams. It can be affirmed, thus, that the MMF approach developed in this research can be considered an important contribution, for the dissemination of the dosage methodology for concrete application in dams.
Acesso aberto (Open Access)
Metodologia para preparação e avaliação de resposta a simulados de emergência de barragem de mineração
(Universidade Federal do Pará, 2018-05-11) DIAS, Rogério Eduardo Souza de Almeida; GOUVEIA, Fernanda Pereira; http://lattes.cnpq.br/1772072130947378
Mining dams are fundamental elements for the process of mineral processing due to the need to concentrate or separate the mineral components of economic interest from the economically unusable components (mining tailings). In order for the tailings to be stored, the reservoirs of dams built in the mining projects for this purpose are commonly used. Over time, dams accumulate large volumes of tailings and water become susceptible to undesirable situations, such as diverse anomalies and failures. In this context, the present research has the objective of presenting a methodology for the preparation and evaluation of response to the Table Top and Full Scale simulated emergency simulations from the PAEBM of the Pera Jusante mining dam, located in the municipality of Parauapebas, state of Pará. The motivation of the work proposal was based on bibliographical research that indicated the lack of methodologies for the application of emergency simulation with mining dams. The methodology was developed based on three stages, the first being the presentation of the dam case study (including the downstream area), the second the execution of the emergency simulation and the third the evaluation of the efficacy of the simulated. The preparation verification methodology used international simulation concepts of emergencies in a gradual and adapted way for dams, starting with the Table Top Exercise and then performing the simulated exercise of full scale field evacuation. During the execution phase of the simulation, guides were prepared to help prepare both the agents involved and the population exposed to the flood spot. In order to record the information of the emergency simulation, it was proposed the use of files containing the details of the emergency situations, the expected responses and other information for the conduct of the simulations. As results obtained it is possible to emphasize that in the stage of execution of the simulated it was possible to know the capacity to respond to a possible emergency situation in the dam case study, with a response from the point of view of the very positive researcher, since it met the (Table Top Exercise) and 93.33% for the Full Scale Exercise simulation. The present research can be applied to any mining dam that has a PAEBM designed and is expected to contribute to the improvement of the methodologies of preparation and response to emergencies with mining dams, being used to improve the process of mining companies that already practice similar actions, and above all, mining companies that are still starting work on emergency preparedness and response to the safety of the downstream population.
Acesso aberto (Open Access)
Proposta de instalação de sistema de alerta em zona de segurança secundária (ZSS): um estudo de caso da barragem de mineração do Gelado – PA.
(Universidade Federal do Pará, 2020-07-10) MORAES, Max Roberto Lima de; GOUVEIA, Fernanda Pereira; http://lattes.cnpq.br/1772072130947378
The tailings dams, most of the times, present a high associated risk, considering the characteristics inherent to the materials that constitute them, and to the existing elevation processes to increase their storage capacity. Thus, studies related to security alert systems are important in order to guarantee alert procedures for the population that is at risk. In this context, this research aims to present a proposal for the installation of an emergency alert system in the secondary safety zone (ZSS) of the Gelado dam, in view of the existence of a population affected by the hypothetical flood spot, presenting the budget of the system based on an actual project. It was also sought to verify the possibility of funding the alert system by the municipal entity, given that it annually collects financial resources from CFEM (Financial Compensation for the Exploration of Mineral Resources). The research methodology was developed based on three stages, the first step 1 - characterization of ZAS and ZSS; step 2 - definition of the location of the installation of the emergency alert system for the ice cream dam ZSS and; step 3 - determining the estimated budget of the alert system in the ZSS. The estimated value for the implementation of the entire alert system, including preventive and corrective maintenance, was R $ 1,678,224.25, being the system composed of five alert towers whose sound protection radius of each tower is 2 km, defined by a minimum sound volume of 70 decibels, sufficient to alert an estimated population of 4,075 inhabitants. It was also concluded that the city of Parauapebas could pay for the installation of the proposed system, since it is benefited annually with significant financial resources from CFEM, having received an average of R $ 457,813,870.35 in the last eleven years (resource that would represent a percentage of 0.37% of the implantation costs). The installation of the system in the ZSS of the Gelado dam would allow, in the event of a collapse, the agility when reporting the accident in the ZSS, implying a lower number of victims, considering that only ZAS has an emergency alert system installed.
Acesso aberto (Open Access)
Proposta de integração da metodologia FMEA na gestão de segurança de barragem hidréletrica
(Universidade Federal do Pará, 2022-03-18) CARVALHO, Regiana Barbosa; GOUVEIA, Fernanda Pereira; http://lattes.cnpq.br/1772072130947378
The dam failure scenario in Brazil has been more frequent than expected around the world and, therefore, dam safety management has become a central focus of entrepreneurs who have sought to meet legal requirements and supervisory bodies. In this context, risk analysis methodologies applied in several sectors of the industry, started to be considered in the management of dam projects, adding benefits in the activities of control and monitoring of the structures, as well as in the prediction of failure modes and accidents. Therefore, the present research has as a general objective, to propose the integration of the risk analysis methodology, FMEA methodology (Failure Modes and Effects Analysis) to the safety management system practiced at UHE Tucuruí, seeking to expand the entrepreneur's management to the scope of the failure mode scenarios and their respective causes, including the monitoring of indicators related to the dam's safety status, occurrence and detection rates. The research methodology was based on five steps, namely: a) characterization of the dam, a case study; b) identification of anomalies present in the structure's history; ç); analysis of the entrepreneur's management process; d) application of the FMEA methodology resulting in scenarios with higher NPR and; e) proposal to integrate the FMEA into the safety management system practiced by the entrepreneur. The results of the FMEA application indicated that among the failure modes simulated for the dam case study, the scenario “internal erosion caused by clogging of filters and drains in the earthen dam on the right bank” presented the highest NPR, and therefore, this is the scenario that requires prioritization of actions. Also, for most of the simulated failure modes, the detection rate resulted in a 'low detection', due to weaknesses in the dam monitoring system, as recorded in the dam instrumentation reports. In the case of the UHE Tucuruí safety management process, it was possible to integrate the FMEA methodology into the plant's flowchart, taking advantage of the "Periodic Review" stage, using the same team hired for this demand, optimizing the flowchart. Finally, it is expected that the integration of the FMEA methodology in the dam management process will provide the following benefits: a) dam safety management oriented towards the management of failure mode scenarios; b) management of risk control mechanisms and continuous assessment of the project's monitoring system.
Acesso aberto (Open Access)
Utilização da termografia infravermelha embarcada em RPA como alternativa de monitoramento de surgências em uma barragem de mineração
(Universidade Federal do Pará, 2024-05-17) BARROS, Eudes José Melo de; GOUVEIA, Fernanda Pereira; http://lattes.cnpq.br/1772072130947378
Safety inspections aim to detect anomalies in structures, and the entrepreneur must guarantee these procedures, in accordance with ANM Resolution No. 95/2022. Therefore, many mining companies have been seeking more efficient methods or techniques that allow for less use of resources and, at the same time, greater control of information from inspected locations. In cases of detecting areas with emergencies, research shows that infrared thermography on board a RPA (Remotely Piloted Aircraft), popularly known as a drone, (TERMO-RPA) is efficient in identifying areas with humidity and infiltrations. Therefore, the objective of the research is to propose the use of this method in the inspection procedures of a mining dam, aiming to detect areas with emergencies. The methodology adopted comprised the following steps: a) Characterization of the dam; b) Description of the methodology of TERMO-RPA inspection procedures; c) Treatment of thermal camera images after inspections; d) Characterization tests of the soil collected from the regions for classification and analysis of possible influence on the detection of emergences; e) Determination of environmental variables in the inspected regions; f) Preparation and analysis of TERMO-RPA thermographic mapping, g) Description of routine dam inspection procedures and advantages of inspection with the TERMO-RPA method. It was concluded that there is an inversely proportional correlation between the temperatures obtained from soil thermography and soil humidity, that is, areas with lower temperatures presented higher percentages of humidity, while in areas with higher temperatures, humidity was lower, This behavior was observed in both periods (dry and rainy). It was not possible to reach an assertive conclusion about the influence of the type of soil and the effectiveness of detecting emergences, since the regions with the presence of humidity are composed of the same type of soil. It was possible to identify advantages in using TERMO-RPA when compared to routine inspections carried out by the entrepreneur, namely: safety aspect with reduced risk exposure; greater agility; absence of restrictions on access to inspection sites; In terms of range, it makes it possible to vary the taking of thermal images of the dam, depending on desired altitudes. Finally, future work is suggested to evaluate the influence of environmental conditions such as temperature and humidity, as well as the presence of vegetation on the soil surface when using the TERMO-RPA method.

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