Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"cyclic triaxial"”.
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Densification and cyclic triaxial testing of Leighton-Buzzard 120/200 sand
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1982.
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Liquefaction Susceptibility of Uncemented Calcareous Sands From Puerto Rico by Cyclic Triaxial Testing
… consolidated undrained monotonic and cyclic triaxial tests were performed using the Playa Santa sand from Porto Rico. Playa Santa sand is a poorly graded calcareous clean beach sand composed of angular particles with large intra-granular voids. A series of consolidated undrained …
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Investigation of stabilized Berea Red soil with emphasis on tensile and cyclic triaxial tests
… Berea Red soil was tested in a monotonic and cyclic triaxial apparatus to determine the short and long stress strain characteristics.
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Liquefaction behavior and dynamic properties of loessial (silty) soils
… has been made to ascertain the liquefaction (cyclic strength) behavior of loessial (silty) soils. No information on the mechanism governing the behavior of these soils under cyclic loads was previously available. This study is important in view of the seismicity of the mid-western region and …
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Stress disturbance on the cyclic behavior of soils and its impact on geotechnical structures
… affects the deformation behavior of soils under cyclic loading. To study the impact of stress disturbance on soil behaviour under cyclic loading, a large number of cyclic triaxial tests were carried out to investigate the cyclic deformation behavior of typical sand and clay samples. The tests on …
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Investigating the Dynamic Soil Behaviour of Cape Flat Sands Under Earthquake Cyclic Loading
… South Africa, limited soil characterization on cyclic testing has been executed on Cape Flat Sands, although the area is in a sensitive seismic region of magnitude ML 6.1 - 7.5. As a result, geotechnical engineers may be using dynamic correlations that are too conservative due to limited …
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Assessment of Improvement in Unpaved Roadway Performance Using 3D Geogrids Under Cyclic Loading
… roadways using the results from an extensive cyclic triaxial testing program. Twenty-seven cyclic triaxial tests were performed, consisting of unreinforced (control) and reinforced samples using two types of 3D geogrids: Grid1 and Grid2. The samples measured 150 mm in diameter and a height of …
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Cyclic Properties of Natural Soil Containing Pumice Particles
… particle shape and crushing on the undrained cyclic behaviour of NP sands, a comprehensive set of undrained cyclic triaxial tests were performed on undisturbed and reconstituted NP sands and reconstituted Toyoura sand with different relative densities. It was found that the reconstituted NP …
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AN ACOUSTIC METHOD FOR IDENTIFYING SAND FABRIC AND LIQUEFACTION POTENTIAL
… liquefaction under undrained, stress controlled, cyclic triaxial conditions.</p><p>Results of the investigation revealed that the compressional wave velocity and attenuation of the saturated triaxial sand samples were reliable indicators of sample fabric, albeit they were very sensitive to the …
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Modelling including associated testing of cohesive soil using disturbed state concept
… of saturated cohesive soils subjected to cyclic loading is developed using the Disturbed State Concept (DSC) is presented in this dissertation. The model takes into account inelastic non-virgin behavior. Factors such as non-associativeness, induced anisotropy and degradation are included …
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The Effects Of Non-Plastic and Plastic Fines On The Liquefaction Of Sandy Soils
… thought to affect the behavior of a sand under cyclic loading. Unfortunately, a review of studies published in the literature reveals that no clear conclusions can be drawn as to how altering fines content and plasticity actually affects the liquefaction resistance of a sand. In fact, the …
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Performance of Fouled Railroad Superstructure Subjected to Traversing Heavy Haul Trains
… First, isotropically consolidated drained cyclic triaxial tests were conducted on fouled sub-ballast retrieved from the test site. Test results were used to assess the material shear stiffness during the loading cycles. Operational speed limits were deduced from the stress-strain behavior …
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Effects of nonhomogeneous cementation in soils on resistance to earthquake effects
… pore pressure generation of sands subjected to cyclic loading. Prior to commencing the test program, a number of index tests were performed on the uncemented and cemented sand used during the laboratory investigation. It was revealed that cementation leads to increased void ratios which distort …
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ASSESSMENT OF THE EFFECT OF EXPANDING RESIN INJECTIONS ON SOIL AND GROUNDWATER FLOW CONTAINMENT
… from the barrier, through the execution of cyclic triaxial tests, aimed at evaluating, at a laboratory scale, the improvement induced by the resin injections on the soil resistance to cyclic loading. The results obtained revealed that, although the resin injection setup was unable to achieve …
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Passive Site Remediation for Mitigation of Liquefaction Risk
… with colloidal silica grout were tested under cyclic triaxial loading to investigate the influence of colloidal silica grout on the deformation properties. Distinctly different deformation properties were observed between grouted and ungrouted samples. Untreated samples developed very little …
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Static and Dynamic Performance of Biochar Enhanced Cement Stabilised Peat
… The findings from the bender elements tests and cyclic triaxial tests showed that the shear stiffness increased with the inclusion of biochar. And finally, the increase in performance in biochar samples translated to a small amount of cumulative plastic strain under cyclic loading.
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Biocementation of Road Foundations: Element Testing, Physical Modelling, and Micro-Scale Characterisation
… granular materials. A series of monotonic triaxial tests were conducted to examine the shear behaviour of uncemented and biocemented aggregates. The observed changes in stress-strain responses, strength and stiffness evolution, and stress dilatancy are consistent with those reported for …
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Cyclic response of Gulf of Mexico clay from the Walker Ridge
… must withstand a combination of non-standard cyclic environmental loads, gravity loads and seismic loads. The importance of these structures, be it from a safety, economic or environmental point of view, warrants an understanding of how their foundations and the foundation soils behave under …