Analysis of a sanitary-embankment failure over the Rio de Janeiro soft clay deposit

1991 ◽  
Vol 28 (1) ◽  
pp. 92-102 ◽  
Author(s):  
Renato Pinto Da Cunha ◽  
Willy Alvarenga Lacerda
Keyword(s):  
Rio De Janeiro ◽  
Soft Clay ◽  
Triaxial Tests ◽  
Guanabara Bay ◽  
Total Stress ◽  
Clay Deposit ◽  
Geotechnical Characteristics ◽  
Penetration Tests ◽  
Oedometer Tests

This paper presents the analysis of an embankment failure over a soft clay deposit in the district of Caju, Rio de Janeiro. The uncommon feature of the analysis is related to the embankment's material, which is mainly composed of dumped sanitary and rubble fill, and the unconsolidated state of the subjacent clay layer. Index tests were performed to obtain geotechnical characteristics and a profile of the soft clay deposit, which were compared with a well-known Brazilian clay from the same area (Guanabara Bay). Oedometer tests, in situ and laboratory vane tests, standard penetration tests, and conventional triaxial tests were also carried out. Total stress calculations were used to interpret and back analyze the failure and also to obtain the mobilized shear strength at both the fill and clay foundation. It was concluded that for an embankment cohesion of 0–20 kPa, the ratio between the back-analyzed Cu and the in situ postfailure Cu has a magnitude similar to the soft clay sensitivity. Key words: case history, sanitary fill, soft clay.

Shearing Strength of a Soft Clay Deposit Near Rio De Janeiro

Géotechnique ◽  
1953 ◽  
Vol 3 (7) ◽  
pp. 300-305 ◽  
Author(s):  
Francisco Pacheco Silva
Keyword(s):  
Rio De Janeiro ◽  
Soft Clay ◽  
Clay Deposit ◽  
Shearing Strength

Permeability evaluation and its implications for consolidation analysis of an Italian soft clay deposit

2001 ◽  
Vol 38 (6) ◽  
pp. 1166-1176 ◽  
Author(s):  
Giampaolo Cortellazzo ◽  
Paolo Simonini
Keyword(s):  
Finite Element ◽  
Soft Clay ◽  
Silty Clay ◽  
The Finite Element Method ◽  
Consolidation Process ◽  
Permeability Characteristics ◽  
Clay Deposit ◽  
Consolidation Rate ◽  
Permeability Evaluation

The present research concerns a comparative analysis of the possible methods for estimating soft silty clay permeability to be used in the analysis of consolidation. For this purpose the consolidation response of a thick and homogeneous, instrumented soft silty clay deposit, on which an embankment was constructed, is back-analyzed using the finite-element method. To model the consolidation process, permeability data are carefully determined both from laboratory and in situ piezocone tests. One-dimensional and triaxial permeability test data are compared with the results of piezocone dissipation tests, the latter interpreted using four different solutions. The effects of anisotropy on permeability characteristics influencing the consolidation rate are also discussed.Key words: consolidation, embankment, finite-element analyses, permeability, piezocone, soft silty clay.

A Study of Pile-Soil Interaction Behavior Under Static, Cyclic and Dynamic Lateral Loadings

1984 ◽  
Vol 106 (4) ◽  
pp. 496-501
Author(s):  
M. Gao ◽  
D. B. Chin ◽  
M. Y. Ma ◽  
R. G. Sun
Keyword(s):  
Soft Clay ◽  
Triaxial Tests ◽  
Silty Clay ◽  
The Finite Element Method ◽  
In Situ Experiment ◽  
Soil Stiffness ◽  
Interaction Behavior ◽  
Dynamic Loadings ◽  
Steel Pipe Pile

In this paper, the pile-soil interaction behavior of a large-sized steel pipe pile in soft silty clay along the downstream of the Yangtze River is analyzed and discussed through an in-situ experiment under lateral static, cyclic and dynamic loadings, along with the static and dynamic triaxial tests on soil samples in laboratory. In the analysis, the finite element method and other simplified methods are compared using different models of lateral soil stiffness. From the results of the tests as well as the analysis, a possible formulation of the p-y curves of the pile in soft clay under lateral loadings is suggested, and a simplified method of dynamic analysis taking into account of the pile-soil interaction is also proposed.

Categorias analíticas do espaço e Turismo: o exemplo da Fortaleza de Santa Cruz, Niterói/RJ

GEOgraphia ◽  
2010 ◽  
Vol 8 (16) ◽  
Author(s):  
Miguel Ângelo Ribeiro
Keyword(s):  
Social Sciences ◽  
Urban Space ◽  
Rio De Janeiro ◽  
Future Generations ◽  
Guanabara Bay ◽  
Single Family ◽  
Spatial Dynamic ◽  
Santa Cruz ◽  
Military Installations ◽  
The City

O objetivo que permeia a presente pesquisa é utilizar a Fortaleza de Santa Cruz, localizada no bairro de Jurujuba, em Niterói, construída em 1555, na entrada da barra da Baía de Guanabara, como foco de antílise, ressaltando a importância deste fixo social enquanto atração turística e de lazer, incluindo a cidade de Niterói no circuito destas atividades, complementares à cidade do Rio de Janeiro; além de abordar conceitos e categorias analíticas, oriundos das ciências sociais, principalmente provenientes da Geografia, pertinentes ao estudo das atividades em tela. Neste contexto, na dinâmica espacial da cidade de Niterói, o processo de mudança de função dos fixos sociais têm sido extraordinário. Residencias unifamiliares, prédios e até mesmo fortificações militares, verdadeiras monumentalidades, foram refuncionalizadas, passando por um processo de turistificação. Assim, a refuncionalização da respectiva Fortaleza em espaço cultural toma-se um importante atrativo da história, do patrimônio, da cultura, marcando no espaço urbano sua expressões e monumentalidade, criada pelo homem como símbolo de seus ideais, objetivos e atos, constituindo-se em um legado as gerações futuras, formando um elo entre passado, presente e futuro. Abstract This paper focuses on Santa Cruz Fortress, built in 1555 in Jurujuba (Niterói), to guard the entrance of Guanabara bay, and stresses its role as a towist attraction and leisure' area, as a social fix which links the city of Niterói to the complementary circuit of these activities in the city of Rio de Janeiro. The study uses important concepts and analytic categories fiom social sciences, particularly fiom Geography.In the spatial dynamic of the city of Niterói, change in functions of social fuces has been extraordinary. Single-family dwellings, buildings and even military installations have been re-functionalized, undergoing a process of touristification. In that way, the refunctionalization of the Fortress as a cultural space provides an important attraction in the domains of history, patrimony, and culture, providing the urban space with an expression of monumentality, created by man as a symbol of his ideals, aims and actions, a legacy to future generations forming a link between past, present and future.

Assessment of trace metal contamination and bioavailability in an Environmental Protection Area: Guaxindiba estuarine system (Guanabara Bay, Rio de Janeiro Brazil)

2020 ◽  
Vol 35 ◽  
pp. 101143
Author(s):  
Michele Fernandes ◽  
Estefan Monteiro da Fonseca ◽  
Leonardo da Silva Lima ◽  
Susanna Eleonora Sichel ◽  
Jessica de Freitas Delgado ◽  
...  
Keyword(s):  
Trace Metal ◽  
Environmental Protection ◽  
Metal Contamination ◽  
Rio De Janeiro ◽  
Estuarine System ◽  
Guanabara Bay ◽  
Trace Metal Contamination ◽  
Environmental Protection Area ◽  
Protection Area

Effects of Stress Path and Stress History on the Stiffness of Reconstituted London Clay

1986 ◽  
Vol 2 (1) ◽  
pp. 139-144 ◽  
Author(s):  
J. H. Atkinson ◽  
J. S. Evans ◽  
D. Richardson
Keyword(s):  
Stress Path ◽  
Triaxial Tests ◽  
Soil Parameters ◽  
Stress History ◽  
Strain Behaviour ◽  
Reconstituted Soil ◽  
Path Dependent ◽  
London Clay ◽  
Soil Behaviour

AbstractSoil behaviour is stress history dependent and stress path dependent and soil parameters, particularly those for stress-strain behaviour, measured in conventional triaxial tests may not represent the behaviour of soil in many civil engineering works.To obtain more realistic parameters it may be necessary to conduct laboratory tests which more closely represent in situ conditions before and during construction.The paper describes equipment developed at The City University to carry out stress path tests simply and economically. A series of CU triaxial tests and stress path tests on reconstituted soil illustrate the dependence of measured soil parameters on stress history and stress path.

In situ estimation of the coefficient of consolidation in clays

1990 ◽  
Vol 27 (1) ◽  
pp. 58-67 ◽  
Author(s):  
Mohammed G. Kabir ◽  
Alan J. Lutenegger
Keyword(s):  
Key Words ◽  
Pore Pressure ◽  
Reference Values ◽  
Time Factors ◽  
In Situ Tests ◽  
Coefficient Of Consolidation ◽  
Oedometer Test ◽  
Undisturbed Samples ◽  
Oedometer Tests

An investigation was conducted to demonstrate the applicability of cylindrical piezocone and flat piezoblade tests for providing reliable estimates of the coefficient of consolidation in clays. Coefficients of consolidation were calculated from piezocone dissipation tests for different degrees of consolidation using theoretical time factors to provide a comparison with laboratory oedometer tests. Three techniques were developed to calculate the coefficient of consolidation from piezoblade dissipation tests. Results from in situ pore pressure dissipation tests were compared with laboratory oedometer tests performed on undisturbed samples oriented in both the vertical and horizontal directions, to provide reference values of cv and ch. The results of investigations conducted at several clay sites are presented. Key words: in situ tests, piezocone, piezoblade, coefficient of consolidation, oedometer test, clays.

scholarly journals Environmental and Sanitary Conditions of Guanabara Bay, Rio de Janeiro

2015 ◽  
Vol 6 ◽  
Author(s):  
Giovana O. Fistarol ◽  
Felipe H. Coutinho ◽  
Ana Paula B. Moreira ◽  
Tainá Venas ◽  
Alba Cánovas ◽  
...  
Keyword(s):  
Rio De Janeiro ◽  
Guanabara Bay ◽  
Sanitary Conditions
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