Análise da estabilidade global para sistema de colunas granulares encamisadas com geossintéticos

• Autor(a) principal: Ferreira, Danielle Caroline [UNESP]
• Data de Publicação: 2016
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/155157; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2017-03-15/000879625.pdf
• topic: Geotexteis; Colunas; Recalque de estruturas; Solos - Consolidação; Geotextiles

This paper presents results of global stability analysis for geosynthetic-encased granular columns system (GEC) in order to present some methodologies for representing the columns in the model. The first methodology presented was developed by Priebe (1995), which purpose to represent the improved soil with the use of columns as a homogeneous soil with weighted parameters. The methodology adapted of Priebe (1995) by Araújo, Schmidt and Brugger (2016) considers the representation of the loading of the embankment and other loadings in the model as concentrated loads on the columns and on the soft soil, obtained with the calculation methodology Raithel and Kempfert (2000) for the design of the geotextile. There is also a proposal developed by Raithel (1999) which considers the representation of confinement due to geotextile in the model as an equivalent cohesion of the column filler material. For these methods, the global stability analyzes were developed using limit equilibrium calculations to determine the safety factor by circular failure surface. In this paper, it will only be adopted Simplified Bishop Method for obtaining safety factor by Slide 6.0 software. For a more complete evaluation, were developed global stability analysis through the finite element method by Plaxis 2D software using a methodology created by Raithel (1999) which considers the representation of the resistance gain due to geotextile in the model as an equivalent effective friction angle of the column filler material.to verify the stability. To compare the results obtained with each methodology taking into account the possible influences of favorable or unfavorable parameters to stability, various analysis are presented by varying the parameters of soft soil, columns fill material and coverage rate adopted