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 14 of 14 for “"Deep Mixing"”.
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Stability of Embankments Founded on Soft Soil Improved with Deep-Mixing-Method Columns
Foundations constructed by the deep mixing method have been used to successfully support embankments, structures, and excavations in Japan, Scandinavia, the U.S., and other countries. The current state of practice is that design is based on deterministic analyses of settlement and stability, even …
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Influences of Curing Conditions and Organic Matter on Characteristics of Cement-treated Soil for the Wet Method of Deep Mixing
The wet method of deep mixing constructs binder-treated soil columns by mixing a binder-water slurry with soft soil in-situ to improve the engineering properties of the soil. The strength of binder-treated soil is affected by characteristics of the in-situ soil and binder, mixing conditions, and …
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Influences of Test Conditions and Mixture Proportions on Property Values of Soil Treated with Cement to Represent the Wet Method of Deep Mixing
… materials produced by the wet method of deep mixing. The testing program focused on investigating the influences that variations in laboratory testing conditions and in the mix design have on measured property values. A base soil was fabricated from commercially available soil components …
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Influence of Curing Temperature on Strength of Cement-treated Soil and Investigation of Optimum Mix Design for the Wet Method of Deep Mixing
The Deep Mixing Method (DMM) is a widely used, in-situ ground improvement technique that modifies and improves the engineering properties of soil by blending the soil with a cementitious binder. Laboratory specimens were prepared to represent soil improved by the wet method of deep mixing, in which …
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Tomographic observations of deep convection and the thermal evolution of the Greenland Sea Gyre, 1988-1989
… and by entrainment but in which the mixed-layer deepens only slowly to a depth of some 150-200m, a deep mixing phase (February-March) during which the surface mixed-layer deepens rapidly to approximately 1500m in the gyre center purely under the influence of local surface cooling, and a …
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Effect of Concentration of Sphagnum Peat Moss on Strength of Binder-Treated Soil
… Previous researchers have found that the deep mixing method effectively improves organic soils. This study presents a quantitative and reliable method for predicting the strength of one organic soil treated with deep mixing. For this thesis, organic soils were manufactured from …
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Stability of Levees and Floodwalls Supported by Deep-Mixed Shear Walls: Five Case Studies in the New Orleans Area
… Engineers (USACE) and other agencies, in using deep-mixing methods (DMM) to improve the stability of levees constructed on soft ground is driven by the need to reduce levee footprints and environmental impacts and to allow for more rapid construction. Suitable methods for analysis and design of …
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Design of Bridging Layers in Geosynthetic-Reinforced Column-Supported Embankments
… can be driven piles, vibro-concrete columns, deep-mixing-method columns, stone columns, or any other suitable type of column. A bridging layer consisting of several feet of sand or sand and gravel is also used to help transfer the embankment load to the columns. Geosynthetic reinforcement is …
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Phytoplankton production in Agulhas bank waters (South Africa)
… and spring surveys, the mixed layer extended deeper than the euphotic zone, with nitrate and phytoplankton biomass being evenly distributed through the euphotic zone. Production maxima occurred at the 40 - 90 % surface irradiance light depths, with some evidence of surface photoinhibition. All …
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Mixed Layer Dynamics Along the Seward Line in the Northern Gulf of Alaska
… A primary source of nutrients is the deep ocean, while light is available in a relatively shallow layer in the upper ocean. In most productive parts of the world oceans, nutrients are brought to surface waters by upwelling. However, in the northern Gulf of Alaska, the winds are …
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Lacustrine Turbidites from Tropical African Lakes as Indicators of Hydrologic and Climatic Changes
… in Lake Kivu's recent history may have triggered deep mixing events, and that potential geologic hazards associated with extraordinary turbidity currents may pose a risk to the current gas-extraction efforts in the lake.</p> <p> To further evaluate the effectiveness of lacustrine hyperpycnites as …
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Machine Learning Approaches for Improving Construction Materials and Pavement Systems
… compressive strength of cement-treated soil for deep mixing. Deep-mixed soil plays a crucial role in reinforcing weak clay soil, which is a common construction problem. The results demonstrated that ML models can enhance the accuracy of forecasts significantly, relative to nonlinear regression, …
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Upper ocean dynamics during the LOTUS and TROPIC HEAT experiments
… is strongly affected by the EUC, resulting in deep mixing and large dissipation at night consistent with observations of the equatorial upper ocean during TROPIC HEAT. Other features of the equatorial circulation (upwelling and the zonal pressure gradient) are of little direct importance to the …
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Phytoplankton's role in the biological pump during the growth season across the Atlantic Southern Ocean
… as nitrate are supplied to surface waters during deep mixing events. Sea ice melt and increased solar radiation in spring drive rapid stratification of surface waters, alleviating phytoplankton from light limitation and allowing them to consume the nutrients supplied in winter. In the framework of …