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ETDs @PUC-Rio
Estatística
Título: EXPERIMENTAL STUDY ON THE SOIL-GEOGRID INTERACTION MECHANISMS
Autor: ANA CRISTINA CASTRO FONTENLA SIEIRA
Colaborador(es): ALBERTO DE SAMPAIO FERRAZ JARDIM SAYAO - Orientador
Catalogação: 11/DEZ/2003 Língua(s): PORTUGUESE - BRAZIL
Tipo: TEXT Subtipo: THESIS PRÊMIO AEERJ - DIRCEU DE ALENCAR VELLOSO - AEERJ
Notas: [pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio.
[en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio.
Referência(s): [pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=4295&idi=1
[en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=4295&idi=2
DOI: https://doi.org/10.17771/PUCRio.acad.4295
Resumo:
A study of soil-geogrid interaction mechanisms was carried out through a detailed testing program in large dimensions equipments at the Geotechnical Laboratory of Cedex, Spain. Three different types of geogrids on sand and clayey-silt were considered in pullout, direct shear and triaxial tests. Additional tension tests on geogrid specimens were also carried out. The pullout tests were performed for investigating the effects of confining pressure, relative density, geogrid geometry and damaged elements on the behavior of geogrids. Based on he test results, it is shown that the pullout strength may be divided into three main components, corresponding to friction, adhesion and passive resistance of transversal elements. The direct shear tests were used for obtaining interface strength parameters and the effect of the inclination angle between the geogrid and the failure surface. It is shown that the optimum inclination is about 60 degrees. This suggests that, in reinforced fills, geogrid layers shall be positioned horizontally. Experimental results and numerical analysis indicate that only the central portion of the direct shear box is subjected to shear stresses and strains. This central zone corresponds to about 40% of the specimen height. The triaxial tests were performed for evaluating the effect of the number of geogrid layers on the deformability and strength of reinforced specimens. Introduction of additional reinforcement layers has a similar effect to an increase of confining pressure. The unconfined tension tests allowed a detailed investigation of the effects of grid damage on the strength parameters of geogrids. Natural damage, induced by compaction procedures, is shown to be more intense when coarse soil is used.
Descrição: Arquivo:   
COVER, ACKNOWLEDGEMENTS, RESUMO, ABSTRACT, SUMMARY AND LISTS PDF    
CHAPTER 1 PDF    
CHAPTER 2 PDF    
CHAPTER 3 PDF    
CHAPTER 4 PDF    
CHAPTER 5 PDF    
CHAPTER 6 PDF    
CHAPTER 7 PDF    
CHAPTER 8 PDF    
CHAPTER 9 PDF    
CHAPTER 10 PDF    
CHAPTER 11 PDF    
REFERENCES PDF    
APPENDICES PDF