Undrained Shear Strength
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Obtaining geotechnical parameters from correlations between geophysics and CPT tests in tailings dams
Abstract This article introduces a hassle-free methodology for geotechnical parameters to be obtained from correlations between geophysics and CPT field tests in tailings dams undergoing the decommissioning process, which are reasonably representative of site conditions, from the very early project stages, with extensive coverage of all impoundment parts, wi
REM, Int. Eng. J.. Publicado em: 2020-12
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2. Simulation of tailings release in dam break scenarios using physical models
Abstract This article presents an experimental study performed to evaluate the volume of material released from the reservoir during a tailings dam failure event using models. To verify the influence of the parameters related to the breach geometry and the undrained shear strength (Su) in a failure event, 20 scenarios were simulated considering the absence o
REM, Int. Eng. J.. Publicado em: 19/06/2019
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3. Influência da velocidade de rotação da mini-palheta na resistência de um solo siltoso / Influence of the mini-vane test rotation rate on the strength of a silty soil
O problema da disposição de resíduos de mineração e a ruptura de barragens de rejeitos preocupa engenheiros e órgãos ambientais nacionais e internacionais. Estes materiais possuem características geotécnicas distintas dos geomateriais encontrados em depósitos naturais, têm granulometria predominantemente siltosa e condutividade hidráulica interme
Publicado em: 2011
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4. Resistência de um solo não saturado a partir de ensaios com teor de umidade constante (CW) / Shear strength of an unsaturated soil from constant water content tests
In many parts of the world, geotechnical engineers frequently deal with unsaturated soils, and the performance of constructions on such soils depends on their mechanical characteristics, and among them, the shear strength. The unsaturated soil shear strength can be experimentally determined by using techniques which allow soil suction control or measurement
Publicado em: 2010
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5. Caracterização geotécnica da sensibilidade de um depósito sedimentar do Rio Grande do Sul com o uso de ensaios de laboratório
Um dos maiores problemas na utilização de ensaios geotécnicos de laboratório está na obtenção de amostras indeformadas. Os solos moles estão entre os mais difíceis de amostrar e há um grande trabalho de pesquisa no desenvolvimento de técnicas de amostragem. A fim de obter amostras de alta qualidade para o estudo do comportamento do material do dep
Publicado em: 2009
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6. Shear strength of an unsaturated soil with direct measurement of suction / Resistência ao cisalhamento de um solo não saturado com medida direta de sucção
The purpose this study was to measure the suction with high capacity tensiometer (HCT), placed at the bottom of the sample, during shear strength tests on a compacted soil. Three kinds of shear strength tests were performed on the sample in different conditions of saturation: triaxial consolidated drained in saturated condition, triaxial consolidated undrain
Publicado em: 2008
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7. Estimativa da tensão de pre-adensamento de argilas saturadas atraves do ensaio de palheta : extensão para limites de liquidez superiores a 70%
This work was based on the "Indirect Method to Pre-consolidation Pressure Estimation Through Vane Tests", proposed by CA VICCHIA (1990). The referred method was reviewed and improved. Therefore, sixty-two samples, previously consolidated with an well defined preconsolidation pressure range, were taken to rupture through a vane test. The values of preconsolid
Publicado em: 2000
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8. ANÁLISIS DE PROBLEMAS GEOTÉCNICOS A TRAVÉS DE REDES NEURALES / ANALYSIS OF GEOTECHNICAL PROBLEMS WITH NEURAL NETWORKS / ANÁLISE DE PROBLEMAS GEOTÉCNICOS ATRAVÉS DE REDES NEURAIS
During the last years, neural networks applications have been disseminated in many knowledge areas, including civil engineering. In the middle 90`s, a research work had been started in Brazil, in order to investigate the efficiency of neural networks in the analysis of soil behavior and problems involving geotechnical engineering. This thesis is the result o
Publicado em: 2000
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9. Mechanical behavior of urban solid waste / Comportamento mecânico de resíduos sólidos urbanos
This thesis deals with the mechanical behavior of urban solid waste from Bandeirantes sanitary landfill (São Paulo, Brazil). Field and laboratory tests, as well as data from field instrumentation (settlement) were obtained and used in the analysis. Results of in situ tests such as standard penetration test (SPT), cone penetration test (CPT), infiltration te
Publicado em: 1999
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10. EFEITO DA TEMPERATURA EM SOLOS / TEMPERATURE EFFECTS ON SOILS
The subject matter of this thesis is the study of the mechanical behavior of clay and residual soils subjected to a series of tests with temperatures ranging from 20 to 70ºC. The experimental program consisted of Atterberg limits, consolidation tests with incremental loading (SIC), triaxial consolidated undrained tests (CIU) and direct shear tests on both s
Publicado em: 1998
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11. NOVA METODOLOGIA DE ENSAIOS TRIAXIAIS DE FOLHELHO / NEW METHODOLOGY FOR TESTING SHALES UNDER TRIAXIAL STRESSES / NUEVAS METODOLOGÍAS DE ENSAYOS TRIAXIALES DE
Shales constitute more than 75% of the drilled rocks in the search for hydrocarbons and an estimated high 90% of wellbore instability problems are credited to their presence. According to Steiger &Leung (1991), more than 600 Million US dollars are spent annually by the oil industry just to corrent the problems due to instabilities. This work presents a new m
Publicado em: 1998