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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 20 of 24 for “"Saturated sand"”.
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Seismic response of adjacent structures on dry and saturated sand
… SSI is that of structures founded in fine loose saturated sandy soil. An iconic example was the devastating effects of liquefaction in Christchurch, New Zealand, during the Canterbury earthquake in 2011. In the case of adjacent structures on liquefiable soil, the experimental evidence is even …
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The break-out behaviour of a suction anchor embedded in a granular soil.
… of hemispherical suction anchors embedded in saturated sand. Anchor types are briefly discussed. Some existing theories related to plate-type anchors, for uplift foundations, and inverted cup-type surface suction anchors are reviewed. The experimental data and their interpretation are also …
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Vehicle Shaping for Mine Blast Damage Reduction
… using 0.636 gram charges. These were buried in saturated sand at three depths, and shaped targets were placed at four heights above the surface. The impulse applied to the plate by the exploding charge was determined through analysis of high speed digital video recordings. Changing the geometry …
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Measuring Liquefied Residual Strength Using Full-Scale Shake Table Cyclic Simple Shear Tests
… liquefied residual strength of #2/16 Monterey Sand. A simple shear testing apparatus was mounted to a full-scale one-dimensional shake table to mimic a confined layer of saturated sand subjected to strong ground motions. Testing was performed at the Parson’s Geotechnical and Earthquake …
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The response of a suction anchor group to various applied loadings.
… and discussed. The tests were conducted in saturated granular soil, contained in a 1.8 m diameter tank, in both loose and dense states. The model anchors and the test apparatus were instrumented so that the pore pressure distribution due to puitping, the water flow rate, and anchor load and …
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Non-thermal Recovery of Heavy oil and Oil Sands Using Nanoparticle
Heavy oils and oil sand resources are considered the largest portion of known energy resources, comprising 70% of total resources. Still, there is potential to increase oil production from these resources to fulfill future global energy needs. There have long been serious critiques of the methods …
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High-Resolution Seismic Characterization of Shallow Sedimentary Structure for Freshwater Resources and Karstic Voids
… data, confirming the presence of fresh water-saturated sand zones and validating the geological characteristics of the area. The study also introduces a Q factor calculation, further enhancing our understanding of the sediment properties. Moreover, the research delves into the propagation of …
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Simulating Earthquake-triggered Runout using Higher-order Hydromechanical MPM and PM4Sand
… loading and free-field modes. Finally, the PM4Sand constitutive model is implemented in the hydromechanical MPM to enable the model to capture the cyclic behavior of sand, including liquefaction triggering and cyclic mobility. Verification and validation of the framework are performed by …
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Ground movements during tunnelling in sand
… - ground deformation relationship for tunnels in sands, the construction process was modelled using the technique of geotechnical centrifuge modelling and the resulting ground deformations were recorded using digital image correlation. In these tests a unique tunnel face boundary condition was …
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Physical modelling of landslides in loose granular soils
… liquefaction might preferentially occur in the saturated granular soil located at the base of the landslide rather than the well-drained inclined portion of the slope. Using a geotechnical centrifuge model, it was found that a small initial toe failure did act as a monotonic loading trigger to …
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DETERMINATION OF THE SYNERGISM BETWEEN EROSION AND CORROSION IN POTASH-SAND SLURRY CORROSION OF CARBON STEEL
… pure corrosion. Experiments were performed using saturated sand-potash slurries over a wide range of solids concentrations, velocities, and two particle sizes. A flow loop apparatus circulated the slurry through an AISI 1018 carbon steel elbow. An additional apparatus was developed to apply …
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Ultrasound Testing System for the Detecting of the Shape and Growth of a Vapor Chamber in the VAPEX Process
… sized air balloons buried in a water- or oil-saturated sand pack. The ultrasound receivers were placed on the physical model to detect the acoustic signals from the transducers. A MatlabTM based program was developed to do the signal processing using wavelet signal transform technique to …
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Liquefaction behavior and dynamic properties of loessial (silty) soils
… indicate that the application of cyclic loads to saturated samples of loess results in a build up of pore water pressure equal to initial effective confining pressure. The samples also underwent failure defined in terms of 5, 10 or 20 percent double amplitude strain. Test samples at natural water …
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Colloidal gas aphrons: generation, flow characterization and application in soil and groundwater decontamination
… effective in flushing hydrophobic organics from saturated sand-packed columns compared with surfactant flushing. CGA provides the surface active agent needed to lower the interfacial tension of the non-wetting phase and at the same time creates enough viscous force to mobilize any trapped fluid. …
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Seismic behaviour of anchored steel sheet pile walls in sand
… the seismic behaviour of ASSP walls in dry and saturated sand was investigated. A series of dynamic centrifuge tests showed that, in dry conditions, the maximum internal forces were driven by the peak horizontal acceleration of the earthquake in the backfill. The systems accumulated the majority …
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Geophysical properties of carbon monoxide when used as an enhanced oil recovery agent
… These tests were carried out with artificial sand packs in order to control the amount of swelling clays present in each sample being tested. The samples were outfitted with acoustic transducers and were ported at both ends to allow for fluid flow in and out of the sample. Measurements were …
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Deformation mechanisms beneath shallow foundations
… of shallow circular foundations on clay and saturated sand models. Clay model tests were performed on soft or rm kaolin beds, depending on its pre-consolidation. Sand model tests were performed on relatively loose Hostun sand saturated with methyl-cellulose to slow consolidation. …
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Constitutive Modelling of Shear Localisation in Saturated Dilative Sand
Undrained deformation of dilative sand generates negative excess pore pressure. It enhances the strength which is called dilative hardening. This increased suction is not permanent. The heterogeneity at the grain scale triggers localisations causing local volume changes and associated drainage. The …
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ASSESSMENT OF THE EFFECT OF EXPANDING RESIN INJECTIONS ON SOIL AND GROUNDWATER FLOW CONTAINMENT
… a mesoscale physical model was realized within a saturated sand-filled experimental container (EC) of dimensions 193 x 143 x 232 cm, where resin injections were performed perpendicularly to the imposed water flow. A series of constant head permeability tests were carried out to assess the …
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Dynamic and Static CO2 Mass Transfer Processes in Bulk Heavy Oil and Heavy Oil Saturated Porous Media
… diffusion coefficient in porous media. A hollow sand pack model was improvised to simulate a well-bore area, when CO2 and oil are in contact. In this model, CO2 is in the inner space, and the heavy oil saturated sand is placed in the outer space of the model. Six experiments in pressure range of …
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