980 resultados para Mecanica do solo


Relevância:

70.00% 70.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

70.00% 70.00%

Publicador:

Resumo:

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Relevância:

70.00% 70.00%

Publicador:

Resumo:

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Relevância:

70.00% 70.00%

Publicador:

Resumo:

Dans ces dernières années, plusieurs méthodes de dimensionnement d'ouvrages de soutènement en sol renforcé ont été développés, mais la doute c’est où l'utilisation de chacun d'eux se révèle plus avantageux? Ce travail a été conçu avec l'objectif de faire une étude d’un cas historiques d'un mur en remblais renforcé avec parement végétal de 27,6 mètres de haut, dont la conception a été analysé en utilisant une méthode de calcul et des logiciels informatiques spécifiques à l’utilisation dans le domaine géotechnique. Avec cette étudesont attendus de résultats capable de présenter les principales caractéristiques de chaque méthode et où il peut le mieux être appliquée

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Relevância:

60.00% 60.00%

Publicador:

Resumo:

The test system connection segmental blocks and geogrids at the Department of Civil Engineering, UNESP - Guaratinguetá order to verify the strength of the connection system when subjected to different confining stresses. The present work aims to demonstrate the procedures for carrying out the test as well as the placement of concrete blocks. Were analyzed two ways of placing the blocks in the press. An entire block and two halves in the first layer, named position 12, compared to a different format, two entire blocks in the first layer, named position 21; also geogrids: single and double layer. From the data obtained for the peak strength of 20 tests it was possible to obtain the envelopes break in the connection for single and double layer. In 2011, the size of the concrete block used in the test was lower when compared with previous years. What resulted in significant decreases in the loss of connection in single layer and it was noted that there was no decrease in the strength of connection in the double-layer tests, despite the smaller area of contact between the block and geogrid. It is concluded that, through the analysis of geogrids after running the test, the concrete block is responsible for theforce that allows the movement of the geogrid due to the force from the ground

Relevância:

60.00% 60.00%

Publicador:

Resumo:

This report analyses the use of geosynthetics in railways for subgrade reinforcement and separation of the track layers. Cases of instrumented test sections were studied. These test sections were located in Australia (with geocomposite applications), Brazil (with geotextile and geodrid applications) and China (with geotextile and geodrid applications). Railway design methods using geosynthetics applications were analyzed as well. Based on a studied case for implementation of geosynthetics in a German railway, a railway track was simulated with and without the use of geosynthetics, respectively on PLAXIS v.8 and FERROVIA 3.0 softwares. The performance benefits of the geosynthetics applications in railways were, therefore, confirmed, based on the simulation results

Relevância:

60.00% 60.00%

Publicador:

Resumo:

The Geotechnical Mapping is an extreme important tool for the urban planning, so the public authorities can establish guidelines for medium and long term for a better life conditions for the population. The division region between the cities of Americana and Santa Bárbara D’Oeste has an intense conurbation problem, which is causing problems of occupation in risks areas on environmental terms. In this context this project has as an objective the elaboration of a Geotechnical Map from the sub- basins of Sossego and Barracão rivers, whicht are located in between the area of the two cities, and presents some of the process causes of the conurbation problem. For this study, the following steps were proposed: bibliographic and topographic maps research for better knowledge from the theme and the area, and also preparing cartographic basis; making of preliminary geotechnical area map with a 1:10.000 scale, gather all the information acquired at the previous step and compartmentation of the area; field step to collect more information and soil for the laboratory analysis, objecting the characterization of the geotechnical unities; lab analysis; final geotechnical map preparation; and final report elaboration. The final product of this study is the Final Geotechnical Map, with a 1:10.000 scale, and the principal objective is to help the urban planning

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Pipelines are linear engineering works, designed mostly for transporting oil and its derivatives for long distances, furnishing even the farthermost zones of the country. Due to oil sector needs to ensure for the safety and conservation of its properties, several geotechnical studies are being held at the pipelines field, in order to preserve this important transportation, and also to prevent accidents, which might seriously compromise the environment and the population who lives around it. The OSBRA pipeline, who connects the city of Paulínia to the capital Brasília, is one of these engineering works that deserves to be pointed out. This research, performed at the Ribeirão da Prata Basin, was a pilot study conducted with the main objective of testing the current methodology efficiency, for future applications in the closest watersheds to the OSBRA pipeline. The objective of this research is to analyze flood wave and debris flow processes in a non-fictional watershed, by comparing two different kinds of methods: the first one based on simulation models (software ‘ABC 6’), and the other one by flood wave and debris flow susceptibility mapping. The results from the hydrological modeling were both hydrographs and ietographs that estimated values of outputs and infiltration. To construct the susceptibility maps were necessary three other maps: ground use and occupation maps, divided according to the different protection degrees that were offered to the ground; maps of dam locations in the area and physiographic compartimentation maps, divided according to the local geology. To complete the methodology, the results were collected from both methods for comparison. The obtained product for this methodology was series of data whose different susceptibility degrees to flood wave and debris flow could define the safest route for a pipeline crossing in this watershed...

Relevância:

60.00% 60.00%

Publicador:

Resumo:

The present paper conducts an analysis of all steps for the construction of diaphragm walls, from obtaining the soil parameters until its execution. Construction stages of diaphragm wall are detailed. The paper presents a detailed analysis of the main available calculation methods to obtain the soil parameters and the design of the diaphragm wall. A case history extensively documented in previous research and present in international symposiums was chosen for an analysis of construction process and excavation’s instrumentations, as well as emphasizing the importance of temporary works and construction sequence for deep excavation with cast in-situ diaphragm walls. In general, it is possible to conclude the main difficulty and uncertainty of the dimensioning are obtaining the soil parameter for diaphragm wall design. And, it is also possible to conclude the monitoring and execution control are paramount to the success of the diaphragm wall construction

Relevância:

60.00% 60.00%

Publicador:

Resumo:

Cette étude visait à générer une carte du potentiel d'érosion pour la Ferme Santa Edwirges, située à Lorena /SP. Les résultats ont etés classifiés en faible, modéré, élève et très élève potentiel d'érosion et la carte obtenue a été comparé par rapport aux autres cartes existantes pour la zone d'étude. La méthodologie proposée se basant sur une application qualitative simple L’équation Universelle de Perte de Sol (USLE ou EUPS), en considérant les parties de l'équation: érodibilité, la topographie et l'utilisation des terres. Les donnés ont etés intégrés par l'algèbre de carte dans l’environnement SIG de ArcGIS. Pour la représentation de chacune de ces parcelles, nous avons utilisé une carte des formations superficielles de la ferme, généré à partir d'une ré-interprétation de la carte géologique, une carte de la pente et une carte d'utilisation des terres, attribuant un poids d’important pour chaque catégorie de ces cartes dans le processus d'érosion et dans l'algèbre proposée. Les résultats obtenus sont compatibles avec les zones identifiées comme les plus critiques sur terrain. La ferme a été identifiée comme de potentiel d'érosion modérée et la partie sud de la ferme le plus critique, suivi du groupe conduit par la zone de cisaillement, par contre les plaines proches des rivières ont eté identifié comme la zone plus stable avec moins de potentiel d'érosionDe la comparaison des résultats de ce travail et d'autres qui ont fait antérieurement dans la zone d’intéresse, qui ont utilisé les paramètres géotechniques dans la représentation de l'érosivité des sols, nous avons pu voir des résultats similaires, en particulier dans les zones à potentiel élevé et faible pour l'érosion. De la discussion et analyse des résultats, la méthodologie proposée à eté validée

Relevância:

60.00% 60.00%

Publicador:

Resumo:

The unpaved back roads, despite their simplicity, are of paramount importance to the municipalities that their economy basis are in agri-livestock and a large portion of their population lives in rural areas, as it is from these pathways that flow of production is performed and ensuring access of the rural population to urban centers is allowed. Aiming the importance of these rural roads, this work studies the case of pathologies found in local roads of São Luiz do Paraitinga, located in the Vale do Paraíba upstate São Paulo, due to lack of a periodic maintenance program the roads not withstood the heavy rains late in the year 2009 and early 2010, generating major impacts on society and the economy of the city. From surveys conducted in the field, it was analyzed the various pathologies found (pathology drainage, slope and platform) checking also the nature of their occurrence, therefore propose solutions for intervention in rural roads, to decrease the susceptibility of these roads during the rainy season