Study Of The Behavior Of An Instrumented Soil Nail Wall In Salvador-Brazil
This paper aims to analyze the behavior of a soil-nailed excavation located in Salvador, Bahia, Brazil. Numerical stress-strain modeling was conducted, using finite element method. The horizontal displacement profiles obtained for the wall face in the numerical analysis presented a good correlation compared to field instrumentation monitoring with inclinometers. The results showed that the magnitude […]
Large Scaled Field Tests On Soft Bangkok Clay (4Th Victor De Mello Goa Lecture)
In this lecture the interpretations of fully instrumented tests embankments and their role in the development of appropriate ground improvement techniques for highways, motorways and airfields on soft clay deposits is illustrated through well documented case studies in Bangkok, Thailand and Muar Flat Site in Kuala Lumpur. For the Bangkok Plain and with sand backfills […]
Lessons From The Lives Of Two Dams (Victor De Mello Lecture)
Many embankment dams completed during the first six decades of the 20th century have been found deficient relative their ability to resist currently anticipated levels of seismic shaking and probable maximum flood. In this Fourth Victor de Mello Lecture, two recent case histories are described. One is a hydraulic fill structure completed in 1920 that […]
Numerical Simulations And Full Scale Behavior Of Sdcm And Dcm Piles On Soft Bangkok Clay
A new kind of reinforced Deep Cement Mixing (DCM) pile, namely: Stiffened Deep Cement Mixing (SDCM) pile is introduced to mitigate the problems due to the low flexural resistance, lack of quality control in the field and unexpected failure of DCM pile. The SDCM pile consists of DCM pile reinforced with precast concrete core pile. […]
Analysis And Control Of The Stability Of Embankments On Soft Soils: Juturnaíba And Others Experiences In Brazil
In the design and evaluation of the behavior of embankments on soft clay foundations, geotechnical characterization, along with instrumentation for measurements involving pore pressure and displacements (vertical and horizontal), are required in order to efficiently elaborate a construction. This paper presents the results of stability analysis, and stability control, with emphases on studies carried out […]
Monitoring And Performance Of Embankments On Soft Soil: JuturnaãÂba Trial Embankment And Other Experiences In Brazil
The accurate performance of instrumentation is fundamental to the adequate use of the results obtained from analyzing the behavior of constructions of embankments on soft soils. When evaluating embankment behavior, the geotechnical instrumentation for pore pressure and vertical and horizontal displacements measurements can be an extremely useful tool, including when there are adjacent structures. This […]
Behaviour Of Three Test Embankments Taken To Failure On Soft Clay
This article compares and analyses the behaviour of three test embankments. The soil foundation consisted of normally consolidated clay overlain by a thick sand surface layer. The embankments were rapidly constructed until failure, which occurred after approximately 50 days. Two of the embankments were reinforced, one including prefabricated vertical drains (PVD), while the third had […]
Effects Of An Abutment Construction On Soft Soil On A Neighbouring Structure: Influence Of Different Construction Techniques Using Geosynthetics
The topographic and geological conditions of several regions in Brazil favour the formation of large deposits of soft soils. Sometimes this requires the use of innovative techniques to allow constructions of geotechnical works in these sites. The presence of deep soft foundation soils has led to an increasing number of reinforced bridge abutments being built […]
Contenção Em Solo Reforçado Com Paramento Frontal Vegetado: Estudo De Caso Em Talude Rodoviário
Trata-se de estudo de caso de um talude de aterro na alça de uma interseção rodoviária no município de Colombo, Paraná, no qual foi executado solo reforçado por meio de elementos de malha metálica com paramento frontal vegetado combinados com geogrelhas. Durante a elaboração do projeto, concluiu-se que o sistema empregado seria a alternativa mais […]
O Projeto Cápsula Do Tempo E A História Da Geotecnia Em Portugal
No âmbito do projeto Heritage Time Capsule, da International Society of Soil Mechanics and Geotechnical Engineering (ISSMGE), a Sociedade Portuguesa de Geotecnia (SPG) tem vindo a desenvolver ações relativas à História da Geotecnia em Portugal. Descrevem-se os objetivos do projeto e as ações já desenvolvidas. Apresentam-se os principais aspetos da contribuição dada pela Sociedade Portuguesa […]
Estudo Do Dimensionamento Do Bulbo Ancorado De Tirantes Através Da Análise De Ensaios De Recebimento
A técnica de estruturas de contenção com ancoragens reinjetáveis e protendidas é muito utilizada no Brasil, mas há ainda muito o que se estudar sobre a determinação da carga de ruptura geotécnica e o dimensionamento do bulbo ancorado. Para o desenvolvimento deste trabalho utilizou-se um banco de dados de 40 tirantes executados em uma cortina […]
Homogenización De Barreras De Arcilla Para Residuos Nucleares
Las funciones de seguridad de las barreras de bentonita para residuos nucleares dependen principalmente del valor de su densidad seca (o porosidad). La evolución de esta variable durante la fase transitoria de la barrera es compleja. El artículo presenta una formulación teórica para calcular, mediante análisis numéricos acoplados, los cambios de densidad seca debidos a […]
