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Showing 1 to 20 of 32 for “"Direct Shear tests"”.
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Comparison of direct shear and triaxial tests for measurement of shear strength of sand
To ascertain the shear strength parameters of soils for engineering purposes is fundamental to soil mechanics and basic for designing earth-bearing and earth-retaining structures. Direct shear and triaxial tests are the most popular laboratory methods to determine these parameters. The direct shear …
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Effects of Freezing Temperature on Interface Shear Strength of Landfill Geosynthetic Liner
… few decades. The present work emphasizes the shear strength of geocomposite clay liner (GCL) and geomembrane interface in landfills. Using direct shear tests, shear stress was measured as a function of normal load to determine the values of interface frictional angle and adhesion of the …
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Experimental studies of scale effects on shear strength, and deformation of rock joints
The effect of scale on shear strength is studied by performing direct shear tests on different sized samples of large joints. A rubber moulding system is used to obtain impressions of the roughness from a variety of natural joint surfaces. A brittle model material is developed and used to cast …
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A resistência residual de solos determinada através do ensaio de cisalhamento por torção
The ring shear equipment developed by Bromhead (1979) to measure the soil residual strength is used here. Initially a detailed literature review on the residual strength is presented. It follows a description of equipment and test procedures. For comparison purposes, results of the direct shear …
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Geotechnical properties of carbonate soils with reference to an improved engineering classification
… index for carbonate sands. Results from direct shear tests showed that this parameter correlates well with crushability and compressibility. It is recommended that this parameter (emax) as determined in the test devised by Kolbuszewski (1948), should be adopted as an index property for …
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Variation Of Geotechnical Strength Properties With Age Of Landfills Accepting Biosolids
… of the landfill materials as a function of time. Direct shear tests used for soil testing, with some modifications, were performed on cured compost samples of MSW mixed with biosolids. Geotechnical strength properties of these cured samples were compared to those of an artificially prepared …
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Experimental and numerical investigation into the Sand/Geotextile shear interaction behaviour
… retaining walls) is determined primarily by the shear interaction between the soil and individual geotextile sheets. This dissertation presents an investigation into the shear interaction behaviour between a locally manufactured non-woven geotextile and Cape Flats sand. The literature review …
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Estudo da resistência ao cisalhamento e densidade relativa das areias e correlações com o SPT
Analysis of the laboratory tests developed to choose the procedure for the determination of ''maximum" and "minimum" density of sand and finishes, adopting "dynamic compactation'' and the Kolbuszewski 's Method'' to obtain the maximum and minimum density respectively. The second part, the …
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Drained shear strength of stiff clays for slope stability analyses
… of the drained residual and fully softened shear strengths of cohesive soils, the shear strength mobilized in field case histories involving previous and no previous sliding in stiff clays, and develop empirical relationships that describe the stress-dependent nature of the residual and …
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Laboratory and Numerical Investigation for the Mobility of Ground Vehicles on Soft Clay
… of the clay-tire interface by performing direct shear tests is a part of a bigger project aimed at enhancing the mobility of off-road vehicles on wet deformable soils. The findings from these experiments will be utilized to calibrate and validate the material constitutive models necessary …
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Characterization of Soft Clay and Clay-tire Interaction for the Prediction of Ground Mobility
… clay-tire interface by conducting large-scale direct shear tests. In addition to clay-tire contact friction, the properties and strength parameters of the soft clay are determined by conducting various index properties and advanced tests. The testing program accounts for different stresses, …
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Süreksizliklerin statik ve dinamik koşullardaki kesme dayanımının yapay süreksizlikler yoluyla karşılaştırılması
… Each type of rock was subjected to monotonic direct shear tests under six different normal loads and their bi–linear failure envelopes were constructed. Similarly, the artificial discontinuities of the same rocks with a new set of specimens were subjected to cyclic shear tests under six …
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A THREE-DIMENSIONAL FULLY COUPLED HYDRO-MECHANICAL ELASTO-PLASTIC MODEL FOR UNSATURATED SOILS WITH CONSIDERATION OF HYSTERESIS BEHAVIOR
… in this research, conventional oedometer and direct shear tests apparatus were modified to fully characterize the behavior of unsaturated soils under cyclic undrained loading conditions. Therefore, an experimental testing program was designed and performed to validate the model proposed for …
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A model for predicting narrow tool behavior under dynamic conditions
… in three steps. First, a series of laboratory tests was conducted to determine the effect of shear rate on soil shear strength and soil-metal friction parameters. Second, a model was developed to include dynamic effects. Third, the model was verified experimentally under laboratory conditions. …
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Material Characterization and Numerical Techniques for Accurate Prediction of Snow-Tire Interactions
… Cap (DPC) plasticity model were derived from Direct Shear Tests (DST) and Confined Compression Tests (CCT). These parameters were validated through numerical simulations, which closely matched experimental results. The effectiveness of different numerical methods including Arbitrary …
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Structural performance evaluation of the Postrite post-treatment corrosion inhibitor system
… dynamically for load/deflection analysis. The direct shear and tensile strengths of the overlays were tested and evaluated. Strain gages were used to aid in an overlay to substrate interaction evaluation. The Postrite post-treatment system was determined to have no detrimental effects on the …
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A.Ü. Ziraat Fakültesi Araştırma ve Uygulama Çiftliği yollarının yapısal özellikleri ve geliştirme olanaklarının belirtilmesi
… analysis, consistency limits, consolidation tests, triaxial tests, direct shear tests, compaction tests. California bearing ratio, permeability, specific weight; and unit weight tests were performed. The pavement design of the roads under the con sideration were done by using the group index …
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Laboratory Investigation of Shear Behaviour in Rock Joints Under Varying Boundary Conditions
… geotechnical design, is through laboratory direct shear testing. Direct shear testing is typically conducted using two different boundary conditions: constant normal stress (CNL*) and constant normal stiffness (CNS). The CNL* boundary condition represents fracture behaviour in slopes and …
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Acoustic Behavior Of Soil Reinforced With Grass Roots
… and streambanks can substantially increase shear strength of soil and reduce erosion. Research has been done to understand and quantify the effect. Most studies have been conducted on slopes and streambanks with woody vegetation. Past research has used a perpendicular root model to predict …
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An Experimental Study of the Dynamic Behavior of Slickensided Surfaces
When a clay soil is sheared, clay particles along the shear plane become aligned in the direction of shear, forming "slickensided" surfaces. Slickensided surfaces are often observed along the sliding plane in field landslides. Because the clay particles along a slickensided surface are already …
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