Fernando H. M. Portelinha

Fernando H. M. Portelinha
Universidade Federal de São Carlos | UFSCar · Departamento de Engenharia Civil (DECiv)

PhD in Geotechnical Engineering
Professor at Federal University of Sao Carlos

About

59
Publications
17,232
Reads
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444
Citations
Citations since 2017
30 Research Items
368 Citations
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
Additional affiliations
January 2013 - present
Federal University of São Carlos, São Carlos, Brazil
Position
  • Professor (Associate)
Description
  • Research experiencies on Geosynthetics, Reinforced soil structures and Geotechnical engineering applied to Landfills
January 2013 - present
Federal University of São Carlos, São Paulo, Brazil
Position
  • Professor (Associate)
Education
July 2008 - August 2012
University of São Paulo
Field of study
  • Geotechnical Engineering

Publications

Publications (59)
Article
A laboratory investigation on the hydration behavior of GCLs from lateritic soils was conducted under isothermal and thermal conditions (tropical climate), varying subsoil moisture contents, GCLs bentonite particle size and mineralogy. GCL hydration levels from lateritic subsoils under isothermal conditions (55%) were similar to literature findings...
Article
Geosynthetic-reinforced soil (GRS) walls using marginal soils can operate under unsaturated conditions depending on climate conditions and drainage inside the reinforced zone. Geocomposite reinforcements have been suggested to act as internal drainage layers, but their hydraulic behavior can also be strongly affected by climate conditions. Numerica...
Article
Full-text available
This paper presents an innovative solution for the improvement of lateritic soils using partially reinforced granular columns. Recycled sand from construction and demolition debris was used as fill material, while a geotextile encasement, and geo-grid layers, served as partial reinforcement methods. Large-scale rigid footing loading tests were perf...
Article
A laboratory testing that simulates the mechanisms of a geosynthetic-reinforced layer was used to assess the impact of rainwater infiltration on reinforcement loads and strains in mechanically stabilized earth (MSE) walls. The testing device allows measuring loads transferred from a backfill soil subjected simultaneously to surcharge loading and co...
Conference Paper
Full-text available
Numerical modeling in geotechnical engineering has generally proved feasible when analyzing the behavior and performance of reinforced soil structures, due to their low cost, versatility, and practicality with respect to physical models. One of the most significant challenges in this process is the choice of appropriate models and parameters that a...
Article
Studies involving oil-contaminated lateritic fine-grained soils are still scarce in literature, especially regarding treatments for improving soils mechanical properties. In this study, geotechnical properties and microstructure of a diesel-contaminated lateritic soil treated with lime are investigated and compared to tests conducted on lime-treate...
Article
Landfills in developing countries usually show municipal solid wastes (MSW) with large amount of food wastes, extraordinarily high moisture contents, and high internal temperatures. Because of these specific characteristics, significant post-closure settlements in landfills with high food waste are expected over time. This paper focused on the asse...
Article
Full-text available
Potential reuse of oil-contaminated soils guidance policies are demonstrating ways to reuse these materials in engineering applications. However, the engineering properties of these materials are highly altered after contamination. Alternatively, chemical stabilization treatments can improve oil-contaminated soil properties for its reuse in geotech...
Article
This paper presents a numerical method for considering soil-atmosphere interaction applied to infiltration into an unsaturated geosynthetic reinforced soil wall and its effect on wall stability. A hypothetical nonwoven geotextile reinforced soil wall was subjected to simulated conditions of evaporation and precipitation over 2 years considering loc...
Conference Paper
Full-text available
RESUMO: Este artigo apresenta diferentes abordagens metodológicas utilizadas para auxiliar o ensino de mecanismos e fenômenos geotécnicos aos alunos do curso de graduação em Engenharia Civil da Universidade Federal de São Carlos (UFSCar). As disciplinas de Mecânica dos Solos 1 e 2 abrangem desde a identificação e caracterização de solos até os prin...
Article
This paper suggests as a rather simple and innovative alternative of the induced trench method with the use of geocomposite replacing EPS geofoam for protection of shallow buried pipes. Laboratory model tests and the numerical studies have been conducted on induced trenches constructed with relatively thin drainage geocomposite, as compressible lay...
Conference Paper
Full-text available
RESUMO: A demanda por combustíveis cresce constantemente, assim como consequentes derramamentos, vazamentos e inadequada disposição de resíduos petroquímicos, causando um grave problema ambiental, a contaminação do solo. Ao mesmo tempo, crescem também as opções reaproveitamento de solos contaminados, tanto pelo apelo ambiental, quanto econômico. En...
Article
The use of local fine-grained soils in geosynthetic-reinforced structures can significantly reduce costs when granular materials are difficult to access. Another beneficial aspect of these soils is that enhanced mechanical behavior is expected with fine-grained soils under unsaturated conditions. With structures built in unsaturated conditions, sta...
Article
Laboratory and field investigation of time-dependent behavior of geotextiles reinforcing a fine-grained soil are evaluated herein. The field assessment consisted of analyses of two instrumented sections of a geotextile reinforced soil wall with identical layouts, including one section with a woven and another with a nonwoven geotextile. In addition...
Article
This paper presents a numerical study investigating the hydraulic response and stability of geosynthetic-reinforced soil slopes subject to rainfall. A series of numerical simulations of unsaturated slopes with various backfill-reinforcement-drainage systems subject to rainfall infiltration was performed by comprehensively considering the combined e...
Conference Paper
Full-text available
Apesar da existência de inúmeras técnicas de remediação para solos contaminados por biocombustíveis, políticas de reaproveitamento destes solos na engenharia civil crescem a medida em que a remediação, bem como a total remoção destes solos, tornam-se inviáveis ou de alto custo. Atualmente, solos contaminados com óleo de motores ou biocombustíveis p...
Conference Paper
Full-text available
RESUMO A estimativa precisa da capacidade de armazenagem e dos recalques de aterros sanitários é imprescindível para a devida operação destes no período de serviço e possível reutilização destas áreas pós-fechamento. Neste aspecto, torna-se importante compreender os mecanismos que envolvem o processo de biocompressão de resíduos sólidos urbanos, os...
Article
A full-scale geotextile-reinforced soil wall was built in order to assess the characteristics of water infiltration and its effect on the structure performance. Nonwoven geotextiles were selected as inclusions in order to provide not only reinforcement, but also internal drainage to the fine-grained soil used as backfill material. The structure was...
Conference Paper
Full-text available
RESUMO: As barreiras capilares com o uso de geossintéticos têm sido intensamente estudadas no intuito de serem utilizadas como barreiras alternativas evapotranspirativas para camadas de fechamento de aterros sanitários. A principal preocupação atual está na previsão e estimativa do comportamento dessas barreiras a longo prazo, considerando as condi...
Conference Paper
Full-text available
RESUMO: Os muros em solo reforçado construídos no Brasil nos quais foram utilizados solos finos de baixa capacidade de drenagem têm apresentado excelentes comportamentos a longo prazo, principalmente quando utilizaram-se solos lateríticos. O sucesso dessas estruturas é normalmente atribuído a manutenção da condição não saturada do solo e, consequen...
Conference Paper
Full-text available
Nonwoven geotextiles have often been selected to provide internal drainage when reinforcing fine-grained soils. However, capillary effects have been typically neglected, although there are evidences that such barriers can develop in this system. In practical applications, backfill materials present low water con-tents and, consequently, negative po...
Conference Paper
Full-text available
Barreiras capilares desenvolvidas na interface não saturada solo-geossintéticos tem sido estudadas como alternativa para compor camadas de fechamento de aterros sanitários em substituição as geomembranas. No entanto, este tipo de barreira pode ser quebrada a depender da sucção e do regime de infiltração. Dessa forma, o entendimento de formação de b...
Article
Full-text available
This paper presents an evaluation of the performance of two instrumented sections of a geosynthetic-reinforced soil wall, 5.6 m high, constructed using a lateritic fine-grained soil. Two sections with identical layout of a nonwoven and a woven geotextile were monitored for comparison purposes. The unconfined tensile stiffness of the nonwoven geotex...
Conference Paper
Full-text available
Neste trabalho será relatado o comportamento de um protótipo de um muro de solo fino reforçado com geotêxtil não tecido em condições intensas de precipitação e sobrecarga, para que o efeito do aumento de tensões fosse avaliado sob as condições do solo umedecido pela infiltração de água da chuva. O reforço de geotêxtil não tecido foi escolhido de mo...
Article
Full-text available
The use of marginal backfills in GSE (geosynthetic stabilized earth) walls has not been recommended by different standards specifications. Restrictions are motivated by the poor hydraulic conductivity of fine soils that are capable of developing of water pressures. However, the use of granular materials can expend the cost of the construction. As a...
Article
Full-text available
O uso de revestimento asfáltico em pontes de madeira de vias urbanas ou rurais e rodovias de baixo volume de tráfego apresenta diversas vantagens, tanto na melhoria da vida útil da estrutura, quanto ao conforto ao usuário. O emprego de geossintéticos pode proporcionar benefícios na camada de revestimento asfáltico por aumentar a aderência na interf...
Article
Full-text available
The first geosynthetic retaining wall in Brazil was constructed in 1984 as an instrumented 10 m high geotextile-reinforced soil wall with a poorly draining backfill. This structure has been showing excellent performance throughout its service life, even after long periods of rainfall. In the past, the excellent performance of the wall had been attr...
Article
Full-text available
The first geosynthetic retaining wall in Brazil was constructed in 1984 as an instrumented 10 m high geotextile-reinforced soil wall with a poorly draining backfill. This structure has been showing excellent performance throughout its service life, even after long periods of rainfall. In the past, the excellent performance of the wall had been attr...
Article
Full-text available
The use of asphalt wearing surfaces on timber bridges for low-traffic volume roads have shown an improvement of the structure service life and the user comfort. The use of geosynthetic may provide benefits on the asphalt wearing surface since it improves asphalt pavement’s adhesion to the deck, minimizes severe cracking, and reduces the reflective...
Thesis
Full-text available
The effect of the wetting front advancement on the performance of nonwoven geotextile reinforced soil walls constructed with poorly draining soils was evaluated by laboratory full scale models. The tested models performances were monitored under rainfall conditions with different intensities and duration, as well as under intermittent precipitation...
Article
Full-text available
O artigo consiste na avaliacão do emprego de baixos teores de cal e cimento, na modalidade de solos modificados, nas alterações das propriedades físicas e químicas de dois solos tropicais, enfatizando a influência dos mecanismos de reação a curto prazo. Para tal, ensaios de caracterização geotécnica de limites de liquidez, plasticidade e análises d...
Conference Paper
Full-text available
Instrumentation, construction and performance of two 5.4 m-high steep geotextile-reinforced soil walls with fine local soils are described in this paper. A relative weak and extensible nonwoven geotextile and a stronger woven geotextile were compared. Both structures were instrumented in order to obtain internal horizontal displacements, facing dis...
Article
Full-text available
Lateritic soils are widely spread in the Brazilian territory and they have been used as subgrade of pavement layers. Specifically, the Red-yellow latosols are usually clayey soils and are characterized as low bearing capacity materials for flexible pavement layers. As a conventional solution, soil stabilization with hydrated lime or Portland cement...
Article
Full-text available
O artigo consiste na avaliacão do emprego de baixos teores de cal e cimento, na modalidade de solos modificados, nas alterações das propriedades físicas e químicas de dois solos tropicais, enfatizando a influência dos mecanismos de reação a curto prazo. Para tal, ensaios de caracterização geotécnica de limites de liquidez, plasticidade e análises d...
Conference Paper
Full-text available
The use of marginal backfills in GSE walls has not been recommended by different standards specifications. Restrictions are motivated by the improperly hydraulic conductivity of fine soils that are capable of developing of water pressures. However, the use of granular materials can expend the cost of the construction. As a result, local soils, gran...
Article
Full-text available
Lateritic soils are widely spread in the Brazilian territory and they have been used as subgrade of pavement layers. Specifically, the Red-yellow latosols are usually clayey soils and are characterized as low bearing capacity materials for flexible pavement layers. As a conventional solution, soil stabilization with hydrated lime or Portland cement...
Conference Paper
Full-text available
As deformações nas fibras dos geotêxteis não tecidos podem ser afetadas pelas condições de ensaio, tais como a taxa de deformação, temperatura, exposição à degradantes, etc. Essa condição de ensaio muitas vezes é definida com base nas condições de campo em que o material será aplicado, ou pode ser definida como uma condição padrão, baseada em norma...
Conference Paper
Full-text available
Strength properties of cement stabilization are related to soil mineral formations. In granular soils, the cement provides cementation of soils particles. In clayey soils, the cement particles form nucleus of cemented soils particles and the eventual mineral dissolutions resulted from pH soils increases. Hence, the strength improvement of stabilize...
Conference Paper
Full-text available
A realidade brasileira da prática da técnica de solo reforçado é que grande parte das estruturas são executadas com solo locais, geralmente solos relativamente finos, passíveis de desenvolvimento de pressões neutras positivas. Muitos dos relatos de deformações excessivas e rupturas de estruturas de solo reforçado estão associados ao efeito do avanç...
Article
No Município de Campos de Goytacazes, RJ, Brasil, a vinhaça (ou vinhoto), subproduto da produção de açúcar e álcool, tem sido utilizada nos canaviais para fertirrigar o solo. Entretanto, se por um lado essa prática favorece as lavouras no que diz respeito à qualidade e ao tempo de maturação da cana-de-açúcar, por outro pode causar a contaminação do...
Conference Paper
Full-text available
O artigo visa avaliar o efeito da colmatação biológica nas propriedades filtrantes de geotêxteis não tecidos expostos a resíduos líquidos de aterros sanitários (chorume) e de resíduos provenientes da extração do etanol (vinhaça). Compara-se o parâmetro O95, normalmente utilizado no projeto de filtros de geotêxteis não tecidos de polipropileno e pol...

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Projects

Projects (8)
Project
O principal objetivo dessa pesquisa é analisar numericamente o comportamento estático e sísmico de uma estrutura de solo reforçado com geossintéticos como sistema de ponte integrada GRS IBS, bem como na identificação das variáveis de influência em condições sísmicas em comparação a estáticas.
Project
Promote and apply new methodologies and procedures to improve the teaching and compression of civil engineering, mainly in the geotechnical area.
Project
Identify the geotechnical properties of oil-contamination to the natural soil