Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica最新文献

{"title":"PRINCIPAIS MANIFESTAÇÕES PATOLÓGICAS EM PAVIMENTOS FLEXÍVEIS: ESTUDO DE CASO DE UM TRECHO CRÍTICO DA RODOVIA DF-001 (PISTÃO SUL), TAGUATINGA/DISTRITO FEDERAL, DOIS ANOS APÓS A PRIMEIRA AVALIAÇÃO","authors":"Alexsandra Maiberg Hausser, L. Ribeiro, G. A. D. Bahia, Rideci Farias, H. Paranhos","doi":"10.4322/cobramseg.2022.0616","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0616","url":null,"abstract":": Highways for the growth of a country's economy, highways are responsible for the traffic of a significant part of productivity. Thus, it is extremely important to preserve and extend the life of a pavement. The present work aims to analyze and evaluate the state of the pavement surface on a critical stretch of the DF-001 highway, in Pistão Sul, located in Taguatinga / Distrito Federal, and to compare the main pathologies found after an interval of two years since the first evaluation, which was the result of a Graduation Course in Civil Engineering in 2017. In this context, for such comparisons, an objective assessment of the flexible pavement surface of the DNIT 006/2003-PRO standard was established, which establishes procedures for evaluating the surface condition of the pavement of the chosen stretch through the visual survey of apparent occurrences and in the determination of the Global Severity Index (IGG). The evaluated section presented a considerable worsening in the occurrences, with a high IGG value, and continued to be classified as a state of poor quality, reflecting on the conditions of safety and comfort.","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121207772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"USO E CORRELAÇÃO DE ENSAIOS DE SOLO IN SITU: CPD, CPE E LWD","authors":"Sonaly Mendes Arruda, Conrado Renan da Silva, Felipe Freitas Santos de Jesus, A. Lucena, Carina Silvani","doi":"10.4322/cobramseg.2022.0574","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0574","url":null,"abstract":"comuns e menos dispendiosos, tais como o Cone de Penetração Dinâmica (CPD) e o Cone de Penetração Estática (CPE), e estabelecer correlações para a obtenção dos bons parâmetros. Neste estudo, realizou-se ensaios LWD, CPD e CPE, com solos do tipo A-2-4, A-6 e A-3, em um recipiente de dimensões determinadas, a fim de estabelecer correlações. Porém, conclui-se que é preciso ampliar a investigação geotécnica para melhorar a acurácia dos resultados encontrados, visto que não houve correlação com mais do que 63% de significância. ABSTRACT: The use of in situ tests is essential for the development of geotechnical works, as they allow to know the real conditions of support and soil condition. However, obtaining good geotechnical parameters requires the use of technological, complex and, consequently, expensive tests, such as the Light Weight Deflectometer (LWD). In the search for cost reduction, it is possible to use more common and less expensive tests, such as the Dynamic Cone Penetration (DCP) and the Static Cone Penetration (SCP), and to establish correlations to obtain the good parameters. In this study, LWD, CPD and CPE tests were performed, with soils of type A-2-4, A-6 and A-3, in a container of determined dimensions, in order to establish correlations. However, it is concluded that it is necessary to expand the geotechnical investigation to improve the accuracy of the results found, since there was no correlation with more than 63% of significance","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121318072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Variabilidade dos resultados de dimensionamento de fundação em hélice contínua a partir de métodos semiempíricos e PCE em Ivaiporã-PR","authors":"E. Bittencourt, Thaís Karen Arruda Fonseca, Roberto Ruani","doi":"10.4322/cobramseg.2022.0927","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0927","url":null,"abstract":"","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114070067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Análise da influência da progressão da cura do concreto no ensaio Pile Integrity Test em estaca escavada mecanicamente.","authors":"G. Santana, Catharina Carvalhais, Diogo Bechler de Moro, Maria Tereza Teles Coelho Aguilar Costa, Alexandre Henriques de Paula","doi":"10.4322/cobramseg.2022.0528","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0528","url":null,"abstract":": The Pile Integrity Test (PIT) is a non-destructive test that presents as an effective and low cost method to investigate pile integrity. To do the experiment, the pile is impacted by a hammer, siring a stress wave that propagates along its length, thus is possible to estimate the depth of the pile through the return time of the reflection stress wave in the accelerometer. However, the reflection signal undergoes changes in locations with impedance variation, that means, it is possible to show alternative changes in the pile density, wave speed or cross-sectional area. Thus, it is important to know how concrete resources without a curing interval that influence the integrity test. Therefore, the present study aims to analyze the changes caused by the compression waves, collected in the PIT test, which are caused by the curing of the concrete.","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116374200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"AVALIANDO A ADIÇÃO DE POLIETILENO TEREFTALATO E CIMENTO PORTLAND PARA MELHORIA DAS PROPRIEDADES DE UM SOLO","authors":"L. Pereira, Carolina Dutra Nichele, F. Silva, F. Schuch","doi":"10.4322/cobramseg.2022.0451","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0451","url":null,"abstract":": Due to its abundance and diversity, soils require procedures aiming to characterize it and to determine its application and behavior. Therefore, the present work compares the variation in soil and cement mixture (2% and 4% at different ages) as well in soil and polyethylene terephthalate (PET) mixture (0.5% and 1%), as well as assessing the increase in the maximum tensile strength obtained from the improvements. The soil was collected and tested in accordance with the requirements proposed by The Brazilian Association of Technical Standards (BANT), in order to characterize it from specific mass and particle size tests. In addition, tests of compaction and resistance to axial compression were performed for each addition. With this, it was possible to carry out a comparative analysis between the variations of the optimum mixture content, the maximum breaking stress as well as the stress x strain behavior. It was","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"132 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113987707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Resistência ao cisalhamento de solo residual de rochas metamórficas do Complexo Embu em Itapecerica da Serra, SP","authors":"Taina Nogueira de Almeida, I. Silva, A. D. Abreu","doi":"10.4322/cobramseg.2022.0166","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0166","url":null,"abstract":"","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114691266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Caracterização das zonas sísmicas mais ativas da Mina Cuiabá, Minas Gerais, Brasil.","authors":"Laura Frota Campos Horta, R. Padula, João Baptista Alves Fraga, A. Assis, R. Figueiredo","doi":"10.4322/cobramseg.2022.0131","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0131","url":null,"abstract":"A medida que minas subterrâneas profundidade, aumento tensões atuantes no maciço rochoso o que ocasionar um maior número de eventos dinâmicos, como rockbursts e FOG ( Fall of Ground ). Portanto, conhecimento do maciço rochoso é primordial. A Mina Cuiabá, objeto desse estudo, é das mais importantes explorações subterrâneas de ouro do país. A medida a mina se desenvolve profundidade, a possibilidade de monitorar e prever o comportamento maciços rochosos constitui tema de alta relevância. contexto, trabalho caracterizar a microssismicidade ABSTRACT: When underground mines grow in depth, there is a raise in rock-mass stress, which can cause more complex events, such as rockbursts and FOG (Fall of Ground). A good knowledge of the rock mass is therefore important. The Cuiabá mine, the object of this study, is one of the largest underground gold mines in the country. With the development of the mine in depth, the possibility of tracking and visualizing the actions of the rock mass is a highly relevant subject. Therefore, the present work aims to characterize the microseismicity of Mina Cuiabá, based on the microseismic monitoring implemented since December 2015 along the 11 th and 17 th levels of the mine. The last 4 years of monitoring (2016-2019) were analyzed in order to better understand microseismic activity, to identify the more active zones and by the Fonte Grande Sul body – right side, followed by Fonte Grande Sul - left side and Serrotinho. Together, these three regions have concentrated almost all the events occured, in fact, Fonte Grande and Serrotinho are the most productive bodies in Cuiabá in recent years.","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114787960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Os \"especialistas\" de plantão e a judicialização dos boatos: os transtornos da imperícia geotécnica na Cidade do Rio de Janeiro. O caso da Avenida Niemeyer","authors":"Luiz José Brandão","doi":"10.4322/cobramseg.2022.0856","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0856","url":null,"abstract":": Two intense rainfall events hit the city of Rio de Janeiro, with distinct characteristics, in 2019 February and April. Despite a much lower death rate than similar events in previous decades, disorders for a significant portion of the population were large. In this scenario of disturbance arise the \"generic specialists\", who with the support of social networks and major media end up inducing judicialization of technical issues, ignoring the competence and experience of an institution with more than 50 years of service to the municipality in geotechnical analysis and stabilization works. On the other hand, experts without compatible experience with the specific situation are appointed to analyze the safety of the track in a short period of time and without performing numerical analysis or geotechnical testing. Despite all the technical arguments succinctly presented in this article, based on studies performed and the baggage acquired over decades, all allegations presented by the city were systematically rejected, with the maintenance of interdiction and inconvenience to the population.","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124390718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estudo sobre o Efeito da Umidade de Compactação em um Solo Colapsível","authors":"Ariela Rocha Cavalcanti, Joaquim Teodoro Romão de Oliveira","doi":"10.4322/cobramseg.2022.0409","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0409","url":null,"abstract":"Este artigo tem por objetivo analisar o efeito da umidade de compactação no comportamento de um solo colapsível retirado do local da construção de um empreendimento imobiliário localizado no município de São Bento do Una, no agreste do estado de Pernambuco. O programa de investigação geotécnica se deu a partir da realização de ensaios de caracterização física, química e da realização do ensaio edométrico simples a fim de se avaliar o potencial de colapso do solo com diferentes tensões de inundação e compactado com umidade referente aos pontos da curva de compactação. De acordo com os resultados obtidos nos ensaios, o solo é uma areia argilosa que tem suas características físicas e composição granulométrica semelhantes aos de outros locais já estudados. Após ensaio edométrico observou-se que o maior valor do potencial de colapso foi de 4,02% na tensão de inundação de 20 KPa e com a menor umidade avaliada. Os ABSTRACT: This paper aims to analyze the effect of compaction moisture on the behavior of a collapsible soil taken from the construction site of a real estate project located in the municipality of São Bento do Una, in the state of Pernambuco. The geotechnical investigation program was based on physical and chemical characterization tests and the simple edometric test in order to evaluate the potential of soil collapse with different flood voltages and compacted with humidity referring to the points of the compaction curve. According to the results obtained in the tests, the soil is a clayey sand that has its physical characteristics and granulometric composition similar to those of other sites already studied. After an edometric test, it was observed that the highest value of the collapse potential was 4.02% at the flood voltage of 20 KPa and with the lowest humidity evaluated. In the flood voltage of 40 KPa the lowest collapse potential values were obtained with a maximum of 2%. It was concluded that increasing compaction moisture gave the soil a decrease in the potential for collapse. These results show that improving soil geotechnical characteristics through good compaction reduces compressibility and minimizes collapse deformations.","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"214 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124220716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"AVALIAÇÃO DA RESISTÊNCIA AO CISALHAMENTO DE UM SOLO RESIDUAL DE LAMITO COM ADIÇÃO DE FIBRAS DE POLIPROPILENO","authors":"Diones Uiliam Barboza, Luigi Pelizzoli, Luiza Keller Fragomeni, Lysiane Menezes Pacheco, Cleber de Freitas Floriano","doi":"10.4322/cobramseg.2022.0761","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0761","url":null,"abstract":": Aiming to meet the various soil conditions desired in engineering projects, the objective of the present study is to evaluate the geomechanical behavior of a mudstone residual soil compacted at the Intermediate Proctor energy with the addition of polypropylene fibers. The soil sample was taken at the city of Gravataí / RS. Soil characterization (grain specific mass, particle size and Atterberg limits), compaction and consolidated drained shear strength tests were conducted with samples of pure soil and with the addiction of 0.5%, 0,75% and 1.0% of fibers relative to the total mass of soil. It was expected that the optimum amount of fibers to be added would be between the percentages of 0.5% and 1.0%, however, the greatest increase in soil resistance was seen in the addition of 0.5%, while the additions of 0.75% and 1.0% of fibers caused an increase in the volume of voids and a reduction of the internal friction angle when compared to the addition of 0.5%.","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127730873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}