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 17 of 17 for “"drainage conditions"”.
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Oxygen and sulfur isotope fractionation by acidithiobacillus ferrooxidans during aerobic and anaerobic oxidation of copper sulfide minerals under simulated acid mine drainage conditions
Includes bibliographical references (pages 86-94).
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Drained cyclic preshearing effects on the liquefaction resistance of sands
… the wide variety of loading mechanisms and drainage conditions which preshearing encompasses. Finally, few studies have addressed specific field sources of preshearing to determine practical guidelines or methods for integrating preshearing effects into traditional liquefaction triggering …
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An experimental investigation into the stress-dependent mechanical behavior of cohesive soil with application to wellbore instability
… geometry, preshear lateral stress ratio, drainage conditions, consolidation stress level, stress history, and cavity volumetric strain rate. This testing program has been performed using small and large TWC devices with outer diameter, Do=7.6cm and 15.2cm, respectively. Both devices allow …
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Influences of Curing Conditions and Organic Matter on Characteristics of Cement-treated Soil for the Wet Method of Deep Mixing
… of the in-situ soil and binder, mixing conditions, and curing conditions.The study presented herein aims to investigate the influences of curing time, curing temperature, mix design proportion, organic matter in the soil, and curing stress on the strength of cement-treated soil. …
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Multi-Scale Thermo-Hydro-Mechanical Behavior of Saturated Earth Materials
… flow and pore pressure generation under partial drainage conditions are formulated to account for the effect of temperature change rate on the thermal consolidation of cohesive soils. The formulation is performed by coupling Darcy's law for water flow in porous media with existing relations …
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Subcritical time-dependent response of Berea sandstone
… deformation in rocks under different boundary conditions. This study indicates that creep exhibits a linear trend at low-pressure stages, while, when deviatoric stress reaches 80% of the ultimate load-bearing capacity, all measured indicators show significant changes. Shear viscosity and bulk …
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Analysis of large deformation offshore geotechnical problems in soft clay
… has been limited to simplified assumptions on drainage conditions and constitutive behavior. This thesis investigates two large deformation problems in soft clay and proposes a methodology for performing coupled flow and deformation analyses with advanced effective stress models. The first part …
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Constitutive Modelling of Shear Localisation in Saturated Dilative Sand
… causing local volume changes and associated drainage. The negative hydraulic gradient drives fluid into dilating shear zones. It loosens the soil and diminishes the shear strength. Continuum-based finite element method cannot apprehend pore-fluid movements at grain scale without extreme mesh …
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Identifikace kritických profilůa návrh ochranných opatření v k.ú Blučina a Židlochovice
Práce řeší problematiku odtokových a erozních poměrů na katastru Židlochovic a Blučiny. Po vyhodnocení těchto kritérií přechází k návrhu liniových a plošných protierozních opatření, u kterých následně vyhodnocuje jejich účinnost.
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Predicting Field Water Balance, Crop Yield, and the Economics of Drainage Under Various Cropping Systems Using Drainmod
<p>Subsurface drainage received considerable attention during the recent few years in South Dakota. While subsurface drainage is a widely accepted water management practice for increasing crop yield, research implicated tile drainage in surface and groundwater quality problems. Conservation …
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Displacement rate and temperature effect on asphalt concrete cracking potential
… sources of cracking because of the climatic conditions and heavy traffic loads. Daily temperature fluctuations and traffic loading are among the external causes of crack initiation and development in pavements whereas structural design of pavements, base and subgrade support and conditions, …
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Long-term Performance of a concrete-lined Tunnel at CERN
… research (CERN) under controlled laboratory conditions, two high-energy particle beams travel close to the speed of light around the most powerful particle accelerator ever built. The accelerator runs through a deep network of underground tunnels and caverns. To forefront the boundaries of …
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Observation-Based Algorithm Development For Subsurface Hydrology In Northern Temperate Wetlands
… was incorporated into a new subsurface drainage algorithm. The spatial variability of water table depth across landscape positions has been represented</p> <p>using a topographic index approach. By incorporating a water table gradient into the VIC grid cell, subsurface-surface water …
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Engineering properties and behavior of silty soils
… due to their variable fabric, partial drainage behavior, and difficulty in classification and sampling. This dissertation presents a comprehensive investigation into the engineering properties, in-situ behavior, and seismic response of natural silty soils from diverse geological and …
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Evaluation of cyclic behavior of dense sands under multidirectional loading using centrifuge tests
… multidirectional shaking. Moreover, typical drainage conditions in the field may be partially drained while shaking-induced vertical strains accumulate. This work forms a unique database of dynamic centrifuge “case-histories” that provide insight into the shear and volumetric response of …
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Some properties of Washington County soils and their relation to soil type and plant growth
… were made of the soil type, slope of the land, drainage conditions, erosion, and land utilization. When samples were taken from cultivated fields, the yield of the crop was estimated. When samples were taken from pasture, notes were made of the type and condition of the vegetation. 2. The …
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An investigation of liquefied shear strength using novel centrifuge tests, direct simple shear tests, and field case histories
… (DSS) laboratory element tests under controlled drainage conditions performed were used to characterize the critical state properties of three nonplastic soils, including the one used in the centrifuge modeling. In addition, various strain rates were used in DSS tests to supplement the strain …