A Comparative Study And Computer Coding Of Limit Equilibrium-based Slope Stability Analysis Techniques

General slope stability concepts and the parameters and major considerations associated withrnslope stability problems are discussed. General features and theories of some of the availablernmethods of analysis such as limit equilibrium methods, limit analysis methods, finite elementrnmethod, etc. are reviewed.rnSpecial emphasis is made to the limit equilibrium slope stability analysis techniques based onrnthe method of slices. The underlying principles, common features and assumptions employedrnby these methods are elaborated. The various commonly used methods of slope stabilityrnanalysis based on the limit equilibrium principles are then thoroughly assessed, compared andrncontrasted.rnThese common limit equilibrium based methods of analysis, including Bishop’s simplifiedrnmethod, Janbu’s simplified method, Bishop’s rigorous method, Spencer’s/Morgenstern andrnPrice’s method, Janbu’s rigorous method, are formulated in a unified manner. A computerrnprogram is then written for these selected methods, using the Visual Basic language, on thernbasis of this unified formulation. The computer program has the capacity of analyzing slopesrnwith general-shaped slip surfaces and general loading conditions. It is also capable ofrnincorporating earthquake loading based on the pseudo-static analysis.rnFinally, example problems are solved to illustrate the computer program developed and tornreflect on the discussions and conclusions in the literature review section. The results obtainedrnfor the example problems, using the computer program developed and the different methodsrnof analyses are in close agreement with those obtained by the author’s of the originalrnmethods.rnKey Words: slope stability analysis; limit equilibrium; method of slices; factor of safety

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