Ground Improvement Techniques Applied To Very Soft Clays: State Of Knowledge And Recent Advances
Soft ground improvement techniques have evolved substantially in Brazil in recent years. However, their application in soft and very soft clays requires a good understanding of the fundamentals of ground improvement techniques suited to the problem as well as the actual field behavior when implemented on a real scale. This paper describes some of the […]
Triaxial Compression Test on Consolidated Undrained Shear Strength Characteristics of Fiber Reinforced Soil
This study aims to experimentally analyze the effect of fiber length and fiber content on shear strength and deformation properties of fiber reinforced soil by consolidated-undrained triaxial shear tests. The best mechanical properties are presented by the samples with 1.0 % fiber content and 3.09 cm fiber length. The stress-strain relationship of fiber reinforced soil […]
Numerical Simulation of Vertical Pullout of Plate Anchors Embedded in Reinforced Sand
This paper presents a model to predict the ultimate pullout load (Pu) for a shallow single vertical plate anchor embedded in sand and fiber reinforced sand for depth (H)/diameter (D) ratios of 1.0, 1.5 and 2.0. The model was developed based on literature field test results and wide laboratory investigation. The numerical analysis was performed […]
Shear Strength of Tropical Soils and Bentonite Mixtures for Barrier Design
Compacted clayey tropical soils have great potential to be used as barriers in waste disposal facilities, considering that some technical requirements are fulfilled (e.g. hydraulic conductivity; compatibility after disposal; shear strength; swelling/cracking, etc). In turn, the bentonite addition is relevant for the cases where the hydraulic conductivity must be lowered, and therefore investigations on the […]
The Performance of a Sand Reinforced with Coconut Fibers Through Plate Load Tests on a True Scale Physical Model
The use of recycled materials has experienced a growing global interest in the last decades. Products like natural fibers are being studied to replace synthetic fibers in some applications because they are renewable resources that have a lower cost. Fibers can be used as reinforcement for covers of landfill sites, landfilling over soft soils, and […]
Cortinas Tipo Berlim Definitivas Ancoradas Em Solos Argilosos: A Questão Da Estabilidade Vertical
A estabilidade vertical de cortinas tipo Berlim ancoradas é substancialmente dependente da complexidade da interacção entre as diferentes partes da estrutura (cortina, ancoragens e maciço suportado). O aprofundamento da compreensão de certos aspectos dessa questão é conseguido re-examinando o problema do equilíbrio vertical à luz das metodologias da análise limite, as quais conduzem a estimativas […]
Estudo De Modelação Da Consolidação Acelerada Por Drenos Verticais Tomando Em Consideraçao A Fluencia Do Terreno
Com o objectivo de entender a importância da fluência em solos argilosos moles e de como este fenómeno é modelado numericamente foi feito um estudo comparativo de modelação de um ensaio edométrico tradicional usando os modelos Soft Soil (SS) e Soft Soil Creep (SSC) do programa PLAXIS. Sobre uma amostra de solo mole proveniente dos […]
3D Numerical Analysis Of Soil Nailing In Sedimentary Soil With Vertical Inclusions
In this case study of a soil nail retaining wall, the measured horizontal displacement is of the order of 0.023% H, where H is the excavation depth, while the two-dimensional Finite Element Method (FEM) analysis suggests horizontal displacements of the order of at least 0.5% H. This study aims to understand which parameters influence such […]
Mechanically Stabilized Wall (Msw) With Geogrids As Complement Of Partially Executed Anchored Wall
This article presents the case study of Wall C11 of Lot 1 in the ringroads of Caraguatatuba and São Sebastião job site, whose original design consists of an anchored retaining wall with a concrete face supported on root piles. At the time of its interruption, only a part of the job had been executed. The […]
Behavior Of Clayey Soil Treated With Nano Magnesium Oxide Material
Clayey soils are spread in many countries and require significant improvement. Recently, nanomaterial have been entered to the geotechnical research as a treatment material. Current study utilized magnesium oxide (MgO) as an additive to enhance swelling potential, compressibility characteristics, and index properties of clayey soil from Mosul city using different content of nano-MgO and under […]
Influence Of Industrial Effluent Treatment Ettringite On The Compressive And Tensile Strength And Microstructure Of Soil-Cement Mixtures
It is increasingly important to find solutions for the problem of the aluminium anodising industry which generates a large amount of acid and alkaline wastewater, composed of high amounts of phosphates, sulphates, nitrates and aluminium. The sulphate removal trough ettringite precipitation is a simple process and involves a low-cost operating. The ettringite can be also […]
Influence Of The Addition Of Carbon Nanotube On The Physical Behavior Of A Lateritic Soil From The Southwest Amazon
In this work we evaluate the physical-mechanical behavior of lateritic soil with addition of carbon nanotubes. The soil was collected in a commercial deposit located in Rio Branco – AC and later characterized through particle size tests, X-Ray Diffraction, X-Ray Dispersion Spectroscopy and Tropical Compressed Miniature essay. The dispersion of nanotubes in solution was carried […]
