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 20 of 38 for “"Limit Equilibrium"”.
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Problemas de estado de equilíbrio limite nos solos: seu estudo e sua programação
… failure criterium. Follows the study of the limit equilibrium for granular media, according to Sokolovskii's theory, specially the bearing capacity problem. Finally a computer program in FORTRAN LANGUAGE to calculate the stress distribution at limit equilibrium of the soil mass. This program …
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Progressive failure of slopes in lined waste impoundments
… on the uncertainties associated with the use of limit equilibrium analyses for evaluation of the stability of slopes in which failure occurs along displacement-softening interfaces. Sliding on such interfaces can occur in a progressive manner with the result that the available interface strengths …
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Estudo da estabilidade de valas escoradas por equilíbrio-limite e pelo método dos elementos finitos
… namely (a) simple (or "empirical") methods, (b) limit-equilibrium methods and (c) the Finite Element Method. In the section on limit-equilibrium methods, a proposal to account for the strut loads (which improve the stability) in the evaluation of the factor of safety of strutted excavations is …
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Rapid Drawdown Analysis using the Finite Element Method
… a multi-stage undrained strength method based on limit equilibrium. The primary objective of this research was to develop a new method for rapid drawdown based on the finite element method. The new method estimates undrained strengths based on effective consolidation stresses from finite element …
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Stability of Embankments Founded on Soft Soil Improved with Deep-Mixing-Method Columns
… deterministic design procedures have evolved to limit failures. Disadvantages of this approach include (1) designs with an unknown degree of conservatism and (2) contract administration problems resulting from unrealistic specifications for deep mixed materials. This dissertation describes …
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Tavis Mining Highway Stability Study - Methods Overview and Sensitivity Study
… provided, as well as a model comparison, using limit equilibrium methods, to one of the previous geotechnical studies performed at the mine. Finally, a sensitivity study of highwall stability is performed using finite difference methods.
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A influência do módulo de deformação das camadas de solo em análises de estabilidade
… methods, from the most traditionally employed limit equilibrium procedures to those considering the stress-strain behavior of the materials through finite element analysis. A theoretical discussion is presented about the three mentioned approaches, highlighting the point of approach or distance …
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Three dimensional numerical modelling of rows of discrete piles used to stabilise large landslides
… as assumed by Viggiani, agree well with his limit equilibrium solutions. The further analyses show that the strength of the slip plane interface has a considerable influence on the pile behaviour, and that the slope of the ground surface is only significant above certain angles. The behaviour …
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The design and construction of a large plane strain apparatus for testing reinforced soil specimens
… soil to provide an improved basis for limit equilibrium design methods. The purpose of this study was to develop a plane strain triaxial apparatus and associated equipment to study the interaction of soil and reinforcement. The plane strain apparatus was designed to model an element of …
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Numerical upper and lower bound limit analysis for braced excavations
This thesis reviews limit theorems and their applications for stability problems in geotechnical engineering. Rigorous numerical solutions of limit analyses can be obtained through finite element discretization of the soil mass and formulation of the limit theorems within a linear programming …
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Wedge failure analysis of anchored rock slopes subjected to surcharge and seismic loads
… conditions by different methods such as the limit equilibrium method, numerical modeling method, reliability method and stereographic method. However, the anchored rock slope against the wedge failure subjected to surcharge and seismic load has not yet been studied in detail in earlier …
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Stability analysis of anchored rock slopes against plane failure subjected to surcharge and seismic loads
… against plane failure in field projects. The limit equilibrium approach for the estimation of the factor of safety of the rock slope against plane failure has been well accepted by the engineers in the past. Very recently, attempts have been made to present analytical expressions for the …
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Analysis of reinforced embankments and foundations overlying soft soils
… that the use of the finite element method and limit equilibrium analyses provide an effective approach for the design of reinforced embankments on weak foundations.
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Lateral load capacity of drilled shafts in jointed rock
… combination of blocks is analyzed with the limit equilibrium approach to determine the ultimate lateral load capacity. Although the analysis is similar to slope stability analysis, it is more complicated with the addition of a lateral force exerted by the pile and the vertical pile load …
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Edifice Stability Assessment of Lassen Peak, Lassen Volcanic National Park, California
… failure surfaces within the edifice using limit equilibrium slope stability techniques. Results of the assessment indicate that the northeast and northwest flanks are the most likely areas for catastrophic circular (global) failures, though these potential instabilities would likely need to …
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Finite element analysis of embankments on soft ground incorporating reinforcement and drains.
… which can be used in conjucntion with limit equilibrium analyses. It is concluded that the finite element method is a useful technique for the analysis of reinforced embankments over soft soils containing vertical drains.
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Mapping and analysis of the Rio Chama landslide and evaluation of regional landslide susceptibility, Archuleta County, Colorado
… coupled with laboratory testing of samples and limit equilibrium stability analysis. A hierarchical heuristic model using an analytic hierarchy process was applied to evaluate the susceptibility of the region to failures similar to the Rio Chama landslide. Weights were assigned to parameters …
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Finite element analysis of embankment dam due to rapid drawdown events
… accomplished by conventional steady seepage and limit equilibrium methods and enable more detailed investigations of the underlying material properties and boundary conditions affecting earth dam performance. This thesis describes the use of finite element (FE) analyses to evaluate the effects of …
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Optimization of Pile Reinforced Slopes Using Finite Element Analyses
… analyses are validated for each case based on limit equilibrium or finite element analyses in terms of factor of safety. With the results validated, a pile is incorporated in the model and analyzed using coupled analysis, which considers the slope stability and pile response simultaneously. …
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