Slope stability analysis, design, and repair services. Geotechnical slope stability of the este msw landfill. The term landslide refers to a situation of instability affecting natural slopes and involving large. With a probabilistic analysis you can take into account variations in material. Alpha adroit also offers consulting services for preventive and remedial measures for small scale and large scale landslides throughout alberta, british. The term landslide refers to a situation of instability affecting natural slopes and involving large volumes of soil. Pore pressure due to seepage through the fill reduces the stability of the slopes, but static water pressure. Application note slope stability analysis worked example. The stability analysis in the 3d space is a cumbersome process. Deterministic and probabilistic analyses are possible.
For specific slope, stability analysis can be performer by utilize slide software from rock science or plaxis. Contains general background information, suitable techniques of analysis with and without the use of computers and examples of common stability problems and. Slope stability refers to the condition of inclined soil or rock slopes to withstand or undergo movement. Detailed pieziometric data at multiple locations and depths within and. The user interface and analysis options are almost identical to the generalised slope analys is module except for the ability to define a slip surface of any general shape. Assessment of the stability of natural and artificial rock slopes is an important topic in the rock mechanics sciences. If you are using a moderen slope stability program, im not familiar with gstable, there is no reason not to use a moderen analysis method. The stability condition of slopes is a subject of study and research in soil mechanics, geotechnical engineering and engineering geology. For bridge approach fills 10 feet or less from the profile grade to the toe of the embankment, the geotechnical engineer has the option to perform a stability analysis, if judged.
It describes the basic rock slope failure modes and methods of analysisboth kinematic and kinetic techniques. Jun 25, 2014 slope stability analysis by the limit equilibrium method. How do friction and cohesion work together to stabilize slopes. This is in part because stability is obviously a key issue in any project will the structure remain stable or collapse. To perform the slope stability analysis a computer program named stb2010 has been used.
With the exception of the pile bearing capacity module, all modules can perform deterministic analyses as well as a probabilistic analyses. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. Learning outcomes gat the end of this session, the participant will be able to. Slope stability and stabilization, second edition is filled with current and comprehensive information, making it one of the best resources available on the subjectand an essential reference for todays and tomorrows professionals in geology, geotechnical engineering, soil science, and landscape architecture. Given how vital slope stability is to public safety, a comprehensive resource for analysis and practical action is a valuable tool. Chapter 10 slope stability analysis nysdot geotechnical page 1011 january 21, 2014 design manual 10.
It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of. Slope stability and stabilization methods by lee w. Intro to slope stability analysis r ced engineering. First order reliability method, finite element method, probability of failure, spatial correlation. In the analysis of slope stability, the primary task is to calculate the safety factor of the slope 15. Chapter 10 slope stability analysis nysdot geotechnical page 106 january 21, 2014 design manual 10. Because the analysis of slope stability is statically indeterminate, the factor of safety cannot be obtained directly from the static equilibrium condition. The second is the influence of calculating factor of safety to slope stability and the third aspect is the definition of the slope failure. This study focuses its attention on the analysis of slope stability for the este municipal solid waste landfill, located in the southwestern part of the province of padua and controlled by the waste treatment company s. Conventional methods of rock slope analysis conventional methods of rock slope analysis can be generally broken down into kinematic and. The main soil parameters were obtained from the laboratory tests and two more sets of parameters were assumed for parametric studies. The prokon geotechnical analysis suite comprises a number of modules for analysis stability and determining capacity.
The program works with the bishops method of slope stability analysis. Geometric effect ihsuan ho 1 abstract many existing factors are found to affect the factor of safety fs for slope stability analysis due to the different analysis methods employed. Before presenting its conclusions, the book discusses special aspects of slope analysis, such as earthquake analysis, pseudostatic analysis, dynamic analysis, and anisotropy, in addition to newmarks approach. Application of the finite element method to slope stability. 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. The first is about the material properties of the slope model. Detailed pieziometric data at multiple locations and depths within and below the slope will likely be needed.
The main soil parameters were obtained from the laboratory tests and two more sets of parameters were assumed for. A onestop source to the understanding and application of slope stability analyses for construction and remediation projects. Rock slope stability analysis utilization of advanced. Slope stability is a major concern for geotechnical and mining engineers worldwide, and consequently, a great deal of effort at rocscience is dedicated to slope stability analysis software. Slope stability verification manual deep excavation llc page 11 e.
Taylor 1937 conceived the idea of analyzing the stability of a large number of slopes through a wide range of slope angles and. Fundamentals and methods presents basic principles for the safe design of constructed or natural earth slopes. Slope stability analysis of embankment of jamuna river. The term slope means a portion of the natural slope whose original profile has been modified by artificial interventions relevant with respect to stability. Erik eberhardt university of british columbia geological engineeringearth and ocean sciences, ubc, 6339 stores rd. A major revision of the comprehensive textreference written by worldleading geotechnical engineers who share almost 100 years of combined experience, slope stability and stabilization, second edition assembles the background information, theory, analytical methods, design and construction approaches, and practical examples necessary to carry out a complete slope stability. Soils and foundations testing experience theory lesson 06 chapter 6 slope stability. It also highlights some of the differences in approach to that adopted by the limit equilibrium method of slices. Slope stability analysis is required for bridge approach fills and soil slopes that contain a foundation that is greater than 10 feet in height or steeper than 2h. A benchmark slope is reanalyzed and conclusions reached about their suitability for meaningful and conservative prediction of slope reliability.
One of the most widely used methods for this purpose is the classification of the slope rock mass. Assessment of slope instability and risk analysis of road cut. Because the analysis of slope stability is statically indeterminate, the factor of safety cannot be obtained directly from the static. New methods and insight, second edition provides helpful practical advice and design resources for the practicing engineer.
A set of 5 basic slope stability problems, together with 5 variants, was distributed in the australian geomechanics profession and overseas as part of a survey sponsored by acads association for computer aided design, in 1988. The limit equilibrium method is the most common approach for analyzing slope stability in both two and three dimensions. This program is used to perform slope stability analysis embankments, earth cuts, anchored retaining structures, mse walls, etc. How does the slope angle play a role in slope stability. Lisa and xstabl have become standard analysis tools for resource planning level and sitespecific slope stability assessments, respectively, on national forests in the westem united states. Advanced seismic slope stability analysis springerlink. Soil strength and slope stability is the definitive guide to. Galena is a powerful, comprehensive and easytouse slope stability analysis system developed by geotechnical engineers for geotechnical, mining and civil engineers who want to solve geotechnical problems quickly and easily galena is one of the worlds leading slope stability analysis packages now used in 74 countries, in some of the worlds largest mining operations. Internal stability can be assured through project specifications by requiring granular materials with minimum gradation and compaction requirements. Slope stability evaluations by limit equilibrium and. Stability analysis lisa, stability analysis for road access sara, the level i1 program, and xstabl the level 111 program. Although the vertical acceleration can be included in a pseudostatic analysis, it is rarely used in practice, as explained below. Chapters include geotechnical and geomechanical analysis techniques.
The slip surface is considered as circular bishop, felleniuspetterson, janbu, morgensternprice or spencer methods or polygonal sarma, janbu, morgensternprice or spencer methods. Includes recommendations for analysis, design practice, design charts, tables, and more. Taylors stability number if the slope angle, height of embankment h, the effective unit weight of material, angle of internal friction, and unit cohesion c are known, the factor of safety may be determined. Slope stability analysis using limit equilibrium method in. Slope stability evaluations by limit equilibrium and finite element methods trondheim, april 2006 thesis submitted to the faculty of engineering science and technology, norwegian university of science and technology in partial fulfilments of the requirements for the degree of philosophiae doctor in civil engineering. Slope stability analyses include static and dynamic, analytical or empirical methods to evaluate the stability of earth and rockfill dams, embankments. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability. Terzaghi 1950 first applied a pseudostatic approach to analyze seismic slope stability. A major revision of the comprehensive textreference. Traditional slope stability analysis is carried out using limit equilibrium methods, an approach that is easy to get familiar with and relatively simple enough to make calculations. Recall modes of slope failureexplain effects of water on slope stability discuss slope stability circular and block. However, a saturated slope with parallel seepage will be about half as steep. For more information about our slope stability analysis services or discuss your. Lisa and xstabl have become standard analysis tools for resource planning level and sitespecific slope stability assessments, respectively, on.
Stability analysis of slopes with dimensionless parameters. The book also describes examples and causes of slope failure and stability conditions for analysis, and includes an appendix of slope stability charts. Slope stability analysis wv department of transportation. Rock slope stability and the design of the appropriate slope angle is extremely important for surface mining in these difficult economic times. Each one of these rock mass classification systems uses different parameters. Make sure you understanding the different input parameters between rock slope, soil. Written by worldleading geotechnical engineers who share almost 100 years of combined experience, slope stability and stabilization, second edition assembles the background information, theory, analytical methods, design and construction approaches, and practical examples necessary to carry out a complete slope stability project. Slope stability analysis geotechnical design manual m 4603 chapter 74 december 2006 slope stability analysis detailed assessment of the groundwater regime within and beneath the slope is also critical. Choose neilly davies for slope stability analysis neilly davies geotechnical engineers have over 35 years experience in the investigation and analysis of both manmade and natural slopes. The objective of this study was to present an advanced methodology for assessing seismic slope stability by taking into account the uncertainties related to the main input parameters.
Of the software which is currently available from rocscience, half of all programs are either specifically dedicated to slope stability analysis ie. The analysis of slope stability is an important aspect of research in disaster reduction engineering. To specify the problem two dimensional stability analysis has been carried out taking the loads from various columns of one frame in 2d space at a time. Even to this day, stability analyses are by far the most common type of numerical analysis in geotechnical engineering. Slope stability analysis, design, and repair services alpha. Nov 01, 2001 a major revision of the comprehensive textreference written by worldleading geotechnical engineers who share almost 100 years of combined experience, slope stability and stabilization, second edition assembles the background information, theory, analytical methods, design and construction approaches, and practical examples necessary to carry out a complete slope stability project. Slope stability analysis of soil slopes using the nonvertical slice method proposed by sarma noncircular slip.
This approach uses a single, monotonicallyapplied horizontal andor vertical acceleration to represent earthquake loading. Application note slope stability analysis worked example 1 introduction this note describes the typical steps followed in setting up and analysing a slope stability problem with limitstate. The only time i conider using bishops method is when i have a small slope with high undrained shear strength that is stable by inspection, but i have to determine and report a factor of safety usually in. The methodology was applied on a real landslide in order to show the advantages of using the proposed procedure and establish the baseline trends of dynamic response and calculated permanent seismic. What is the best software to analyse the slope stability. Assessment of slope instability and risk analysis of road. Rock slope stability analysis utilization of advanced numerical techniques dr. In the recent decades, several rock slope classification systems are presented by many researchers. Mar 21, 2016 taylors stability number if the slope angle, height of embankment h, the effective unit weight of material, angle of internal friction, and unit cohesion c are known, the factor of safety may be determined. Using a unified approach to address a medley of engineering and construction problems, slope stability analysis and stabilization. This engineer manual em provides guidance for analyzing the static stability of slopes of earth and rockfill dams, slopes of other types of embankments, excavated slopes, and natural slopes in soil and soft rock. It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of determining, relatively unambiguously, whether a. The design of too flat of a highwall angle means considerable additional mining costs.
Whether youre involved in surface mine design or production, construction, education, or regulation, this is an important new book for your library. Slope stability analysis, design, and repair services alpha adroit engineering ltd provides slope stability analysis, slope design, slope failure investigation, and slope and landslide repair. Slope stability analysis by the limit equilibrium method books. Difference between simplied janbu and bishop slope. This paper presents an analysis of soil slope stability using a terrestrial laser scanner, particle swarm optimization, and the force equilibrium method. The main objectives of slope stability analysis are finding endangered areas, investigation of potential failure mechanisms, determination of the slope sensitivity to different triggering mechanisms, designing of optimal slopes with regard to safety, reliability and economics, designing possible remedial measures, e. Jul 23, 2014 the analysis of slope stability is an important aspect of research in disaster reduction engineering. The second is the influence of calculating factor of safety to slope stability and the third aspect is. Slope stability analysis by the limit equilibrium method. The aim of this study was to demonstrate that a slope needed to be analyzed in many different directions in order to assess its stability conclusively, rather than using just one crosssectional profile to represent the entire slope.
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