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 […]
Dehydrating Subsurface Clayey Soils Using Plastic Electrodes: A Simple, Fast, And Yet Reliable Technique
The electrokinetic process seems to be interesting to the earthwork portion on the construction of buildings, and transportation projects since this simple, fast, yet reliable technique could expedite dehydrating of soil and reduce delays in the construction schedule. This paper examined the technical feasibility and a brief cost analysis of using plastic electrodes for electrokinetically […]
Lateritic Soil Deformability Regarding The Variation Of Compaction Energy In The Construction Of Pavement Subgrade
The performance of the subgrade towards the main deterioration mechanisms must be considered in the pavement structure design. Thus, this paper discusses the resilient modulus and permanent deformation evaluation of a pedological horizon of a Brazilian lateritic soil deposit, comparing samples compacted in the laboratory at the three compaction energies (standard, intermediate and modified) and […]
Technical Feasibility Analysis Of Using Phosphogypsum, Bentonite And Lateritic Soil Mixtures In Hydraulic Barriers
Every year, millions of tons of phosphogypsum, a by-product of the fertilizer industry, are produced worldwide. As just a small part of this amount is reused, this study analyzed a new alternative to reuse this material in geotechnical works, in mixtures with lateritic soil and bentonite for the construction of liners for sanitary landfills. Four […]
Dosage Method For Unconfined Strength And Fatigue Life Of Fiber-Reinforced Cement-Treated Sand
Fiber-reinforcement has been reported as an effective and cost-attractive technique to improve the mechanical behavior of cemented soils. However, the dosage methodologies for these mixtures are still limited, especially regarding dynamic loading. The objective of this research was to analyze the dynamic response and strength behavior of fiber-reinforced cement-treated sand. In this sense, fatigue life, […]
Soil Surface-Atmosphere Interaction In A Monitored Embankment Constructed With Two Compacted Lime-Treated Soils
This study was carried out in an instrumented and monitored embankment divided into two symetrical sections and constructed with compacted treated soils (i.e., a silty soil and a clayey soil) exposed to the same atmospheric conditions in a continental climate, with oceanic influences. It aimed to investigate changes of bare soil surface moisture (w) and […]
