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 “"Layered soil"”.
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Investigation of clay smear formation in laboratory-prepared layered soil specimens
… formation of clay smears in laboratory prepared soil specimens. Digitized video clips of specimen deformation under vertical shear were reviewed. New conventions and definitions were developed to describe and measure the onset of clay smear. Measurements for a variety of sample layering …
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Application of oxygen microbubbles for groundwater oxygenation to enhance biodegradation of hydrocarbons in soil systems
… was done by injecting oxygen microbubbles in the soil matrix packed in a 7 ft by 7 ft by 5 inches in width Vertical Slice Test Cell, VSTC, and in a 30-inch column, also packed with sand. Transfer of oxygen to water was monitored after injecting oxygen microbubbles. Compared to sparged air and …
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Modelling the effects of soil variability and vegetation on the stability of natural slopes.
It is well recognised that the inherent soil variability and the effect of vegetation, in particular the effect of tree root reinforcement, have a significant effect on the stability of a natural slope. However, in practice, these factors are not commonly considered in routine slope stability …
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One Dimensional Computer Analysis of Simultaneous Consolidation and Creep of Clay
… of one dimensional consolidation of multi-layered soil profiles. The program uses an elasto-visco-plastic model that can simulate both consolidation and creep in a single consistent analysis. The finite element program uses standard oedometer test data to model stress-strain-time …
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Moisture distribution in soil irrigated with a line source subsurface trickle irrigation system
Soil moisture distribution resulting from a line source subsurface trickle irrigation system was studied on bare and cropped layered soils. The soil type was an Uchee loamy sand. The Continuous System Modeling Program (CSMP) Model was used to simulate the soil moisture distribution resulting from …
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Analysis of soil penetrometer using Eulerian finite element method
… Element (EFE) method for modeling penetration in soils. The formulation decouples material and nodal points displacements such that soil flows through a fixed finite element mesh. This approach eliminates problems of mesh distortion associated with conventional Lagrangian formulations but requires …
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A Procedure To Develop Scalable Reduced Models For The Transient Response of Sleepers In Conventional And High-speed Railway Lines.
… of scalable reduced models for the through-the soil interaction and traveling wave effects of distant sleepers in a long railway track. For development purposes, and, without loss of generality, the geometry of the sleepers is consistent with the UIC-60 track system commonly used in European …
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The Development of Shaft Friction and End Bearing for Piles in Homogeneous and Layered Soils
… loose sand, and loose sand overlying clay. The soil was placed under controlled conditions in a 3.0 m diameter by 3.0 m deep concrete tank.<br/><br/>The variation in local unit shaft friction and radial effective stress was monitored along the pile shaft, together with the distribution of axial …
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Consistent description of radiation damping in transient soil-structure interaction
Dynamic soil-structure interaction problems are characterized by an unbounded soil-domain and thus by radiation damping. This radiation damping arises due to wave propagation from the excited structure into the subsoil and may lead to a reduction of the structural response. A consistent description …
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Evaluation of Contaminant Containment at Regina Landfill
… partitioning vadose zone model that uses a multi-layered soil column was used to simulate advective flows; and CHEMFLUX, a one-dimensional model to simulate diffusion. The results suggest that inherent low permeability property of the native barrier underlying the landfill is adequate to prevent …
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Seismic Response of Pile Foundations in Soft Clays and Layered Soils
… by transferring loads to deeper layers of soil. During earthquakes, in addition to the axial loads, pile foundations are subjected to inertial loads and kinematic loads due to the motion of the superstructure and the vibrations of surrounding soil, respectively. Due to the significant …
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Computer program development for the analysis of inelastic beam and soil behaviour in geotechnical design
… problems based on the principles of beam-soil interaction where the beam is supported by a single or two-layer soil system. In 1867, a foundation model was proposed by Winkler in which the elastic foundation beneath a horizontal beam could be viewed as a series of independent springs. …
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Experimental Study of the Displacements Caused by Cone Penetration in Sand
… modes of deformation are experienced by the soil elements in close proximity of the penetrometer tip. The close-up imagery of the interface zone provided useful information for understanding the model penetrometer-sand interface behavior. The series of cone penetration tests conducted in …
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Contribution to kinematic and inertial analysis of piles by analytical and experimental methods
The problem of pile - soil interaction is examined in the Thesis at hand by means of both theoretical analyses and experimental investigations. Pile foundations in seismically prone areas are subjected to both direct loading, such as axial and lateral forces imposed at their heads, resulting from a …