slope stability analysis factor of safety

 

 

 

 

Abstract Slope stability analysis of earth dam is very important to ascertain the stability of the structure.Keywords Slope stability Static analysis Earth dam Finite element software Factor of safety Shear strength reduction Displacement. Slope stability analysis is performed to assess the safe design of a human-made or natural slopes (e.g. embankments, road cuts, open-pit mining, excavations, landfills etc.) and the equilibrium conditions. Slope stability is the resistance of inclined surface to failure by sliding or collapsing. [Show abstract] [Hide abstract] ABSTRACT: In this study, Imperialistic Competitive Algorithm (ICA) is utilized for locating the critical failure surface and computing the factor of safety (FOS) in a slope stability analysis based on the limit equilibrium approach. Key words: slope stability, landslide, analysis, limit equilibrium, interslice forces, factor of safety, spline function, optimization methods, case history.Introduction. The calculation of slope stability safety factors is a routine practice. For slopes, the factor of safety F is defined as the ratio of the actual soil shear strength to the minimum shear strength required to prevent failure.Keywords: Factor of Safety, Limit Equilibrium Method, Finite Element Method, Slope stability Analysis. The programs encompass soil and rock slope stability, limit equilibrium and finite element analysis, and 2D and 3D modeling.Using the automated Shear Strength Reduction feature, the factor of safety for different slopes can be determined. Table 2 Recommended Factors of Safety for Slope Stability Analysis.

Factor of safety from taylor stability number method. Fig. 4 gives the critical/minimum factors of safety, Fc obtained after few trials as discussed earlier. Slope stability methods vary in their theoretical background and approach and hence the analysis results vary depending on the used theory. In addition, simplified assumptions in 2D slope stability methods have led to factors of safety that differ from the more rigorous 3D slope stability analysis (1979) incorporated the apparent root cohesion (cR) in their infinite slope analysis and found an increase in the factor of safety (FOS) for some slopes. The results indicated that tree roots improved the stability of forested slopes. The factor of safety equations are written in the same form, recognizing whether moment and (or) force equilibrium is explicitly satisfied.J 14,429 (1977) Introduction The geotechnical engineer frequently uses limit equilibrium methods of analysis when studying slope stability problems. It is this third site, located about one half mile downstream of the falls, that is the subject of the slope stability analysis discussed here.R ota tion al force R ough ly 90 Figure 11.

8 Safety Factor Calculations A true factor of safety (FS) calculation is beyond the scope of this preliminary study This study focuses on the impact of the uncertainties of soil and seismic loads on the slope stability analysis and how to determine the reliability of the analysis results in terms of factor of safety. The factor of safety is an indication of whether a slope is safe or not, minimum values and other standards are normally stipulated by regional regulations. Traditional slope stability analysis is carried out using limit equilibrium methods Strength Reduction Method is used to carry out Slope Stability Analysis. Factor of Safety. Independent analyses are performed for each individual load and the Analysis results are also generated individually. To prevent losses of lives and properties, engineers need to check whether the safety factor of slope is appropriate for each type of structure for the worst condition of soil. However, the slope stability analysis is based on the classical soil mechanics assumption Numerical modeling was carried out to determine the factor of safety for different slope geometries and likely failure surfaces.Fig.6.1 (c) Stability analysis of footwall at 550 bench slope with safety factor 1.44 by FLAC. that the factor of safety decrease prorate (22.071) for up-stream of Minimum Reservoir Level and prorate (17.273) for downstream of Maximum Reservoir Level with seismic forces effects. 810. REFERENCES. [1] Al-Jorany, A.N (1996), Slope Stability Analysis, Ph.D. Disserta-tion The slope stability analysis was performed by using finite element method of Phase2-6.0 software.This simulated result shows that factor of safety actual slope indicated the slope in. unstable condition. FLAC 7.0 - Slope Stability Analysis - Продолжительность: 13:01 Itasca Consulting Group, Inc. 40 951 просмотр.Geotechnical-Factor of Safety Against Sliding on Retaining Wall - Продолжительность: 7:16 Civil Engineering Academy 44 598 просмотров. And why dont try this book to read? slope stability analysis factor of safety is one of the most referred reading material for any levels.Popular Books Similar With Slope Stability Analysis Factor Of Safety Are Listed Below Slope stability. Causes of instability Mechanics of slopes Analysis of translational slip Analysis of rotational slip Site investigation Remedial measures. Influence of factors on the factor of safety Classification of causes of instability Further reading. back to Slope stability. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. Criteria are presented for strength tests, analysis conditions, and factors of safety. ABSTRACT: This paper examines the application of Finite Element (FE) analysis to the determination of the factor of safety of rock slopes for which strengthThe paper first outlines the standard shear strength reduction (SSR) technique used for FE slope stability analysis of Mohr-Coulomb slopes. 6 Slope Stability December 2006. 6.2 design factor of safety.the factor of safety computed by using the rule of thumb is less than 2.5, a more sophisticated stability analysis is required. Slope Stability Analysis Procedures Presentation for AEG/GI Short Course. UC Riverside, May 12, 2012 William Kitch, Cal Poly Pomona.4 William A Kitch 2012. Measures of stability. l Factor of safety. The assumption of a 50 reduction of post-peak cohesion and friction angle resulted in factor of safety of 0.67. This is an approximately 100 drop. This simple experiment indicates that elastic-perfectly plastic model best replicates limit-equilibrium slope stability analysis. Perhaps more pertinent, their factors of safety vary narrowly within 1.

253 to 1.257. This compares with the minimum factor of safety 1.287 of the critical circular surface of Fig.Reliability applied to slope stability analysis. J. Geotechnical Engrg ASCE, 120(12): 2180-2207. Slope stability, Factor of safety, Soil nail, Numerical Analysis, Limit Equilibrium Method.In assessment of slopes, engineers primarily use factor of safety (FOS) values to determine how close or far slopes are from failure. The optimization of side slope with required factor of safety as per IRC guideline has been also attempted in the present study. Treatment of embankment slopes for erosion control is considered to prevent from damage due erosion from rain and wind. Key words - Stability analysis The factor of safety for slope stability analysis is usually defined as the ratio of the ultimate shear strength divided by the mobilized shear stress at incipient failure. In mining the design of stable slopes has significant impact on the economics of the open pit mine [2,5,8,9,12-14,16]. Traditional slope stability analysis is limited to the use of single valued parameters to analyze a slopes characteristics. Consequently, traditional analysis methods yield single valued estimates for factor of safety of a slopes stability. The paper presents a slope stability analysis of a proposed embankment contained within an abandoned coal mine reclamation project near Sallisaw, Oklahoma.A factor of safety below one implies the slope will fail, as the resisting forces are less than the forces causing failure. Slope stability analysis: The term slope means a portion of the natural slope whose original profile has been modified by artificial interventions relevant with respect to stability.As a first approximation should be taken X 0 and iterate for calculating the factor of safety, this procedure is known as the [1]. Slope-stability analyses are mostly conducted by identifying or assuming a potential failure surface and assessing the factor of safety (FS) of that surface. When coming with slope stability analysis factor of safety, we feel really sure that this book can be a good material to read. Reading will be so enjoyable when you like the book.Popular Books Similar With Slope Stability Analysis Factor Of Safety Are Listed Below The definition of the safety factor for slope stability. Yield criterions in common use. The substituent relationship between the criterions. Case study. Conclusion. Slope Safety Factor Analysis Using ANSYS. SSRFEM Slope Stability Analysis. Reduce strength of slope materials in FEM model by factor.If solution does not converge end calculations (slope has failed). Factor of safety factor initiating failure. The factor of safety equations are written in the same form, recognizing whether moment and (or) force equilibrium is explicitly satisfied.The geotechnical engineer frequently uses limit equilibrium methods of analysis when studying slope stability problems. ABSTRACT Analysis of slope stability focus, on determining the value of the safety factor (Fs). which is mean the ratio between the shear strength of the soil to the developed shear stress on a certain slip surface. The common method of a slope stability analysis of natural slopes and slopes formed by cutting and filling are based on limiting equilibrium. In this type of analysis the factor of safety with regard to the slope stability is estimated by examining the condition of equilibrium when incipient failure is For general slope stability analysis of permanent cuts, fills, and landslide repairs, a minimum safety factor of 1.25 should be used. Larger safety factors should be used if there is significant uncertainty in the analysis input parameters. Rock Slope Stability Analysis - Utilization of Advanced Numerical Techniques. Dr. Erik Eberhardt University of British Columbia.rock mass shear strength toppling, etc.) can analyse analysis) factor of safety. Slope Stability Analysis Factor Of Safety. Read Book OnlineDownload or read online ebook slope stability analysis factor of safety in any format for any devices. The key procedure and main purpose of slope stability analysis using the limit equilibrium technique are the calculation of the factor of safety. Given a predefined slip surface LRFD - Slope Stability Analysis. Analysis According to Chinese Standards.Verification according to the factor of safety: where: Ma. Although the actual values given to the elastic parameters have a profound inuence on the computed deformations prior to failure, they have little inuence on the predicted factor of safety in slope stability analysis. Slope stability analysis is applied by two-dimensional 2D and three-dimensional 3D analyses.The procedures are based on finding a Factor of Safety (FS) for the slope . I Main Topics A Role of slope stability analysis in 4-step procedure B General procedure for slope stability (limit equilibrium) analyses C Factor of safety D Three main types of limit equilibrium analyses E Method of slices F Eect of ow parallel to a slope on water pressure. Slope stability analysis methods 17 Table 2.1 Recommended factors of safety F (GEO, Hong Kong, 1984).18 Slope stability analysis methods. Presently, most slope stability analyses are carried out by the use of computer software. This chapter is concerned with characteristics and critical aspects of the stability of excavation slopes methods of designing slopes, including field observations and experience, slope stability charts, and detailed analyses factors of safety and methods of stabilizing slopes and slides.

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