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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 32 for “"Saturated soils"”.
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Pore Pressures in Partially Saturated Soils
Made available in DSpace on 2014-12-10T22:21:28Z (GMT). No. of bitstreams: 1 7114755.pdf: 4144484 bytes, checksum: 8c428c8b9808536d048776d1c080ae0b (MD5) Previous issue date: 1970
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Electroosmotic purging of contaminants from saturated soils
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
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Finite Element Analysis of Nonlinear Consolidation
… is presented for the unified treatment of saturated and partially saturated soils. Two sources of nonlinear material behavior are identified. The nonlinear material behavior under fully drained condition is represented by an elasto-plastic material model formulated in terms of effective …
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A study of air flow through saturated porous media and its applications to in-situ air sparging
… the mechanisms governing air propagation through saturated porous media is therefore critical to the design of an effective cleanup treatment. The objectives of this investigation were thus to identify and to quantify the parameters that affect the advancement of an air front through saturated …
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A THREE-DIMENSIONAL FULLY COUPLED HYDRO-MECHANICAL ELASTO-PLASTIC MODEL FOR UNSATURATED SOILS WITH CONSIDERATION OF HYSTERESIS BEHAVIOR
<p>"Unsaturated soils are often used as a construction material in transportation infrastructures; in which it is subjected to cyclic traffic loadings and/or seasonal wetting-drying cycles. While mechanical hysteresis is a common feature of soils in general, hydraulic hysteresis is associated with …
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Assessing Drift and Lateral Mobility of Flazasulfuron and Trifloxysulfuron Sodium
… when excessive herbicide rates were applied to saturated soils. Based on perennial ryegrass injury, flazasulfuron at the rates tested was equivalent or more mobile than trifloxysulfuron sodium and equivalent or less mobile than pronamide when subjected to irrigation or rainfall soon after …
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Modelo constitutivo basado en la teoría de la plasticidad generalizada con la incorporación de parámetros de estado para arenas saturadas y no saturadas
… thesis is focused on constitutive modelling of saturated and partially saturated granular soils from state parameters point of view. The Generalized Plasticity constitutive equation has been extended in order to reproduce stress-strain behaviour of granular soils with a single set of intrinsic …
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The Runge-Kutta Taylor-SPH model, a new improved model for soil dynamics problems
… numerical modeling of dynamics behavior of dry soils in the framework of small and large deformation theory and of dynamics behavior of saturated soils in the framework of small deformation theory. A numerical code has been developed to analyze such behaviors and presents three versions: - The …
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Tree Composition Along Edaphic and Hydrologic Gradients in Nonriverine Wet Hardwood Forests
… to establish target ranges for vegetation, soils and hydrology and to examine trends in plant species composition along a wetness gradient. Although quantitative vegetation analysis for this community has been published, broad drainage classes were used to represent a moisture gradient. We …
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Collapse of stone column foundations due to inundation.
… by foundation engineers involves partially saturated soils which possess considerable in-situ dry strength that is largely lost when the soils become wetted. Foundation design in such soils is difficult at best. In many cases, deep foundations may be required to transmit foundation loads to …
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Development of instrumented oedometer incorporated with bender element and electrical conductivity
Soft soils are normally associated with high moisture content and fine-grained particles possessing poor geotechnical properties such as low shear strength and high compressibility. Solidification, using hydraulic binders could be adopted to improve these poor properties. The compressibility of …
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Effects of anisotropy on the behaviour of unsaturated compacted clay
… have been proposed to model the behaviour of unsaturated soils. Many of the models were developed on the basis of the modified Cam Clay theory for saturated soils. However, the elasto-plastic models for unsaturated soils were validated based on the data obtained from samples prepared one …
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RESPONSES OF UNDERGROUND STRUCTURES SUBJECTED TO BLAST LOADING
… interaction between transportation tunnels and saturated soils subject to internal explosions using medium amounts of explosives (< 100Kg TNT). Centrifuge modeling made it possible to create small scale models using a relatively small quantity of explosives under a high g-level. Two tests …
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Development of a constitutive model for a heaving clay from Rosebank
Heaving clays are partially saturated soils composed of a high fraction of the montmorillonite clay mineral. When exposed to free water they undergo volumetric expansion, which often results in differential movements at the surface and damage to building structures founded on the clay. The economic …
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Optimising carbon storage by land-management
… what controls SOC, identify carbon under-saturated soils, and make land-management change to increase SOC. To achieve these objectives a soil sampling campaign and land-use survey were undertaken at Wallington, with further sampling at a verification site in Cambridgeshire. Land-use …
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Application of Fatigue Theories to Seismic Compression Estimation and the Evaluation of Liquefaction Potential
Earthquake-induced liquefaction of saturated soils and seismic compression of unsaturated soils are major sources of hazard to infrastructure, as attested by the wholesale condemnation of neighborhoods surrounding Christchurch, New Zealand. The hazard continues to grow as cities expand into …
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EPOLLS: An Empirical Method for Prediciting Surface Displacements Due to Liquefaction-Induced Lateral Spreading in Earthquakes
… pore pressures or liquefaction in undelying, saturated soils. Here, lateral spreading is defined specifically to exclude liquefaction failures of steeper embankments and retaining walls, which can also produce lateral surface deformations. Lateral spreads commonly occur at waterfront sites …
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Fracture characterization of clays and clay-like materials using flattened Brazilian Test
… date, the application of fracture mechanics to soils has been limited to dry and partially saturated soils where soil consistency changes due to suction and tends to be harder exhibiting a quasi-brittle behavior. Of late, studying fracture propagation in clays and mudrocks has become of interest …
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Assessing the Cost and Operational Feasibility of "Green" Hardwood Winter Inventory for Southeastern Pulp Mills
… a pulp mill in the Southeast can be difficult. Saturated soils and low soil strength make logging difficult or impossible on many sites, forcing companies to store large volumes of hardwood pulpwood in woodyards for retrieval during wet weather. Hardwood fiber readily available in large volumes …
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Dynamisches Mehrphasenmodell mit hypoplastischer Materialformulierung der Feststoffphase
… of the pore fluid on the bearing behaviour of soils. In addition to simple consolidation the model is applicable for the simulation of the phenomenon of soil liquefaction initiated by earthquake induced failures in saturated or partially saturated soils. Further applications in geotechnical …
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