Retaining Walls
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Behavior of expanded polystyrene as lightweight filler in retaining walls with intermediate slabs
Abstract The present study explores a retaining wall with an intermediate slab. To reduce the lateral earth pressure on the wall, the substitution of part of the soil by blocks of expanded polystyrene (EPS) with high density is proposed, which could result in significant economic savings. Also, the possibility of building the wall elevation with smaller thic
Lat. Am. j. solids struct.. Publicado em: 14/03/2019
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2. Estudo de painéis de alvenaria estrutural sujeitos a ações perpendiculares ao plano
There are several cases of out-of-plane loaded masonry such as earth retaining walls, water reservoir, wind loaded panels and other. Thus, there is a lack of Brazilian technical literature in this topic. The aim of this thesis is to fulfill this lack and to be as a reference text to design such structures. The litterature review covers recommendations from s
Publicado em: 2007
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3. Analise de paredes de contenção atraves de metodo unidimensional evolutivo : Marcelo Tacitano / Earth-retaining structures analysis with the evolutionary one-dimensional method
The retaining structures, usually of wood, steel or concrete, can be constituted by sheet pile wall, piles with lagging, ?in cast? pile walls and diaphragm walls among others and need to be designed, so that they reach the requirements about functionality, execution, safety and economy an appropriate way. It is possible divide the design methods in three gre
Publicado em: 2006
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4. Field monitoring behavior of geotextile-reinforced soil retaining wall prototypes / Avaliação experimental de protótipos de estruturas de contenção em solo reforçado com geotêxtil
Apesar das vantagens relacionadas ao uso de estruturas de contenção em solo reforçado, a maioria das obras em nosso país ainda é executada por soluções convencionais. A ausência de um conhecimento mais profundo sobre o real comportamento das estruturas em solo reforçado, principalmente em termos de deslocamentos, certamente impede uma utilização m
Publicado em: 2006
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5. A NUMERICAL ANALYSIS OF THE BEHAVIOR OF TIED-BACK EARTH RETAINING WALLS / ANÁLISE NUMÉRICA DO COMPORTAMENTO DE CORTINAS ATIRANTADAS EM SOLOS
A necessidade da execução de escavações urbanas cada vez mais profundas tem imposto aos engenheiros geotécnicos o grande desafio de equilibrar elevados esforços horizontais com um mínimo de deslocamentos do maciço de solo e das estruturas localizadas nas vizinhanças. Para muitos destes casos, a utilização de cortinas atirantadas se constitui na so
Publicado em: 2003
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6. ANÁLISE DO COMPORTAMENTO DE UM MURO DE CONTENÇÃO UTILIZANDO PNEUS / BEHAVIOUR OF A GRAVITY RETAINING WALL USING SCRAP TIRES / ANÁLISIS DEL COMPORTAMIENTO DE UN MURO DE CONTENCIÓN UTILIZANDO NEUMÁTICOS
Construction of a retaining wall using scrap tires and soil is presented in this thesis. The technique was developed as part of a research program at PUC-Rio in collaboration with University of Ottawa and Geo-Rio. The present work consisted of building and analyzing an experimental retaining wall which was constructed in Jacarepaguá, Rio de Janeiro and made
Publicado em: 1998
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7. FIELD AND LABORATORY TESTS ON THE BACKFILL OF THE EXPERIMENTAL TIRE RETAINING WALL / ENSAYOS DE CAMPO Y LABORATORIO EN EL TERRAPLENADO DEL MURO EXPERIMENTAL DE NEUMÁTICOS / ENSAIOS DE CAMPO E LABORATÓRIO NO RETRO-ATERRO DO MURO EXPERIMENTAL DE PNEUS
Este trabalho consiste na determinação de parâmetros de deformabilidade e resistência do solo do retro-aterro do muro experimental de pneus, localizado em Jacarepaguá (Rio de Janeiro). O muro experimental de pneus possui quatro seções, das quais foram escolhidas duas para realização dos ensaios de campo e para extração dos blocos indeformados. For
Publicado em: 1997
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8. Cryptic peptidoglycan and the antiphagocytic effect of the Staphylococcus aureus capsule: model for the antiphagocytic effect of bacterial cell surface polymers.
The antiphagocytic effect of the Staphylococcus aureus capsule is known to be related to its ability to interfere with opsonization by normal human serum. In this study, evidence is presented with isolated cell surface components which indicates that the capsule hinders opsonization by masking cell wall peptidoglycan. In contrast to intact, encapsulated S. a
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9. Scanning Electron Microscopy of Rhizobium trifolii Infection Sites on Root Hairs of White Clover
White clover root hairs which were inoculated with Rhizobium trifolii 4S (infectious strain) contained infection threads which were observed by light microscopy and scanning electron microscopy. Three morphological types of root hairs retaining infection threads were recognized. The bacteria were strongly attached between the surfaces of two plant cell walls
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10. Cell Wall Composition and Decreased Autolytic Activity and Lysostaphin Susceptibility of Glycopeptide-Intermediate Staphylococcus aureus
The cell wall composition and autolytic properties of passage-selected glycopeptide-intermediate Staphylococcus aureus (GISA) isolates and their parent strains were studied in order to investigate the mechanism of decreased vancomycin susceptibility. GISA had relatively modest changes in peptidoglycan composition involving peptidoglycan interpeptide bridges
American Society for Microbiology.
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11. Autolysis of methicillin-resistant and -susceptible Staphylococcus aureus.
The autolytic activities, including unstimulated, Triton X-100-stimulated, and daptomycin-induced, of various sets of methicillin-resistant and related methicillin-susceptible strains were compared. Faster rates of autolysis were noted in two heterogeneous methicillin-resistant transductants than in their methicillin-susceptible parental recipients, in a het
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12. The effects of polycations on vascular permeability in the rat. A proposed role for charge sites.
This study investigated whether charge sites in the walls of the microvasculature may play a role in maintaining the impermeability of the nonrenal capillaries to albumin. All experiments were performed in nephrectomized rats, studied in the awake state. The intravenous injection of protamine sulfate (4 mg/100 g body wt dissolved in 0.9% saline) was followed