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

{"title":"Influência de concreto jateado e atirantamento em análises de estabilidade de um túnel executado em maciço rochoso","authors":"Klinger Senra Rezende, Juliana Aparecida de Oliveira, Rafael Nascimento Gomes","doi":"10.4322/cobramseg.2022.0213","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0213","url":null,"abstract":"","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"67 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":"127759358","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":"Tratamento de solos com recurso a colunas de deep soil mixing na expansão de aterro sanitário em Biguaçu, Santa Catarina, Brasil","authors":"N. Silva, Alexandre Pinto, M. Felix, Fábio Brumano","doi":"10.4322/cobramseg.2022.0933","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0933","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":"126308042","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 Através de Métodos Determinísticos e Probabilísticos da Ruptura Geotécnica de Porto em Barcarena/PA","authors":"Gabriel Banha, J. Alencar, B. Jorge, Tárcio Gomes da Silva","doi":"10.4322/cobramseg.2022.0853","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0853","url":null,"abstract":": Several geotechnical accidents recorded in recent years in the country have emphasized the importance of carrying out probabilistic analyzes in order to better understand the risk factors involved in the problems. This way, this work presents a probabilistic analysis of the slope stability of a pier under construction, located in the city of Barcarena / PA , which failed a few months after the constructions of a compacted landfill on soft soil to access it. In order to evaluate que possible causes of the failure, several cenarius were simulated using the software Slope, developed by Roc Science Inc, involving situations of tide fluctuation and fill loading, to calculate the probabilities of failures and their corresponding factors of safety. The deterministic factors of safety were in all situations very close to 1 or less. These results were not able to explain in a reasonable way how could the slope be stable for approximately 5 months. Such explanation was possible only based on the probabilistic analysis and the calculated probability of failure which showed that the most critical situation was in low tide with the fill load completely applied. In this situation the probability of failure was close to 60%, what means that the slope was very likely to fail, but not necessarily the failure would occur. Besides that, it may be concluded that the variation of the tide level, with its 6 hour time period between maximum and minimum levels, induces a process o fatigue within the slope which causes an elevation of the probability of failure along the time.","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"73 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":"126382831","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 contração em um solo argiloso laterítico estabilizado granulometricamente através da incorporação de resíduos","authors":"Igor Henrique Dalle Molle, J. Lukiantchuki","doi":"10.4322/cobramseg.2022.0868","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0868","url":null,"abstract":"","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"10 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":"126489556","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 de Resultados de Ensaios de Caracterização e de Adensamento Edométrico ao Longo da Profundidade de um Depósito de Argila Mole","authors":"J. Castello, Vitor Nascimento Aguiar, Tácio Mauro Pereira de Campos, Ana Carolina Cavalcante Viana","doi":"10.4322/cobramseg.2022.0601","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0601","url":null,"abstract":"resultados caracterização e adensamento realizados amostras indeformadas extraídas longo profundidade depósito argila mole localizado Santa Cruz, oeste cidade Rio de Janeiro. As amostras foram extraídas com amostradores tubulares de parede fina, com diâmetro externo de 76,2 mm, sem folga interna pistão estacionário. técnicas empregadas amostragem moldagem dos corpos de prova dos ensaios edométricos permitiram a obtenção de corpos de prova de excelente qualidade próximo à superfície do depósito e de qualidade boa a regular profundidades mais elevadas. corpos de prova mais argilosos de boa qualidade, ABSTRACT: This work presents results of characterization and one-dimensional consolidation tests carried out on undisturbed samples taken along the depth of a soft clay deposit located in Santa Cruz, western region of Rio de Janeiro city. The samples were taken with thin-walled tubular samplers, with outsider diameter of 76.2 mm, without inside clearance and with fixed piston. The techniques applied for sampling and trimming the one-dimensional consolidation test specimens provided excellent quality specimens close to the deposit surface and good to fair quality specimens at higher depths. In the good quality clayey specimens, it was obtained compressibility and consolidation parameters very similar to the ones obtained in other Quaternary clay deposits on the Brazilian coast.","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"5 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":"126399929","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":"Ascensão Capilar de Solo Fino Usando Modelo Reduzido","authors":"Jair de Jesús Arrieta Baldovino, R. Izzo","doi":"10.4322/cobramseg.2022.0458","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0458","url":null,"abstract":": The objective of the article is to analyze the capillary rise of a fine soil of sedimentary origin in a scale model in laboratory. The results showed that the velocity of water rising through the capillaries of soil increased when the soil was compacted with a higher dry unit weight. The expansion of soil started to manifest after the capillary water reached an average of 1/3 of the total height. Over time, the coefficient of permeability decreased in all cases from 0.0005 cm/s to 0.0003 cm/s. It was found that the air intake was located at 25 cm in height and that the matric suction in the soil registered values of 600-800 kPa for saturation degrees between 90%-100%. It was verified that the rise height vs. time curve is mainly influenced by the molding porosity, saturated state permeability coefficient and air entry height.","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"PP 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":"126428938","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":"O CONTROLE TECNOLÓGICO DE UMA PEQUENA CONTENÇÃO EM SOLO GRAMPEADO NA CIDADE DE PORTO ALEGRE/RS","authors":"D. Benetti, Cleber de Freitas Floriano","doi":"10.4322/cobramseg.2022.0172","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0172","url":null,"abstract":": The injections performed for stapled soils are of paramount importance for the functioning of the containment system. The technological control of a stapled soil work aims to test the capacity of these injections, not only through the normative criteria of cement grout resistance, but also in response to the interface with the soil when consolidated, by pullout test. This work aimed to evaluate the use of the stapled soil technique in a residual granite soil in a work located in the city of Porto Alegre / RS, using some technological controls, such as: RCS (Resistance to Simple Compression) of the grout staple injection cement and staple pullout test to check the adhesion tension (q s ) in prototype staple. For the verification of the RCS, more than 50 specimens of cement grout and some concrete from the construction site were molded in loco. The pullout test, on the other hand, was carried out at the construction site 28 days after the injection of the cement solution, whose specified water-cement factor was 0.5 for the CPII-32 cement. The pullout test result can be related to the direct shear test performed for the system anchoring soil. It was possible to make a map of the resistances of each injected clamp. From the clamp pullout test, it was possible to obtain and interpret the force-displacement relationship through loads and discharges with a monkey-pump-manometer set, observing that the value of q s must be interpreted as a function of the displacements obtained. Even with the curing of the specimens in the air, 85% of the samples tested ranged from 20 to 32 MPa, with 15% being around 19 MPa. The pullout test indicated that the value of q s adopted must be in the range of values between 180 and 245 kPa.","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":"126455159","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":"Substituição de dreno vertical de areia por geocomposto drenante em modelo de laboratório de barragem de terra","authors":"Rafael Anibele, B. Tonus, C. Lautenschläger, Elis Regina Halitski","doi":"10.4322/cobramseg.2022.0192","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0192","url":null,"abstract":"","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"5 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":"128089620","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":"Influência da Sazonalidade nos Fatores de Segurança de um Maciço Terroso","authors":"Ingrid Belcavello Rigatto, G. Pinto, Sabrina Ferreira de Paula","doi":"10.4322/cobramseg.2022.0884","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0884","url":null,"abstract":"","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"11 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":"125245549","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":"MODELAMENTO NÚMERICO PARA PREDIÇÃO DE ÁREAS COM POTENCIAL DE INSTABILIDADE NA RAMPA DA MINA III","authors":"J. Silva, Gustavo E. A. P. A. Batista","doi":"10.4322/cobramseg.2022.0239","DOIUrl":"https://doi.org/10.4322/cobramseg.2022.0239","url":null,"abstract":"constante Mecânica de minerações subterrâneas. Para importante o comportamento do maciço rochoso perante os esforços que são submetidos. O objetivo deste trabalho é identificar, a partir do modelamento numérico no software Map3D, regiões da rampa da Mina III com potencial de ocorrência de instabilidades devido a variação do regime de tensões ocasionado pelas aberturas das lavras planejadas 2020 e 2021. A metodologia consiste em simular a abertura dos stopes e verificar a variação do σ 1 e σ 3 no teto das rampas. O critério de ruptura de Mohr-Coulomb será utilizado para determinar a instabilidade e a envoltória de ruptura foi obtida a partir de retro-analises das componentes de tensão normal e cisalhante, obtendo os valores de coesão e ângulo de atrito que usados para calcular os valores de σ 1max para todos os valores de σ 3 obtidos na modelagem fatores segurança rampas permanentes fatores segurança, 1.3, pontos ABSTRACT: Preventing events that promote instability is fundamental to a rock mechanics department at underground mines. In order to analyse this, it is crucial to understand the rock mass behaviour due to the stress conditions. This study aims to identify regions at the Mine III decline where is expected instabilities promoted by stress variation. It will be estimated by numerical modelling at MAP3D software, considering the planned openings in 2020 and 2021. The methodology consists in simulate the stopes opening and check the variation of σ1 and σ3 at the roof along the decline. The Mohr-Coulomb failure criteria will be used to determine the instability and the rupture envelope was obtained from retro-analysis of the normal and shear stress components, obtaining the cohesion and friction angle values that will be used to calculate the σ1max values for all σ3 values obtained in the modelling. The results obtained have indicated that some crosscuts to access the oredrives presented safety factors less than suitable. Most part of the declines presented safety factors higher than 1.3, and some specific points requires special attention since its proximity with stoping.","PeriodicalId":206776,"journal":{"name":"Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica","volume":"27 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":"125645570","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}