Recall modes of slope failureexplain effects of water on slope stability discuss slope stability circular and block. 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. Soil strength and slope stability is the definitive guide to. 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. Chapters include geotechnical and geomechanical analysis techniques. Because the analysis of slope stability is statically indeterminate, the factor of safety cannot be obtained directly from the static equilibrium condition. Rock slope stability and the design of the appropriate slope angle is extremely important for surface mining in these difficult economic times. Geotechnical slope stability of the este msw landfill.
The design of too flat of a highwall angle means considerable additional mining costs. Includes recommendations for analysis, design practice, design charts, tables, and more. 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. 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. Rock slope stability analysis utilization of advanced numerical techniques dr. 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 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.
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. Slope stability analysis wv department of transportation. Soils and foundations testing experience theory lesson 06 chapter 6 slope stability. Slope stability analysis by the limit equilibrium method books. The second is the influence of calculating factor of safety to slope stability and the third aspect is. Deterministic and probabilistic analyses are possible. This approach uses a single, monotonicallyapplied horizontal andor vertical acceleration to represent earthquake loading. Because the analysis of slope stability is statically indeterminate, the factor of safety cannot be obtained directly from the static. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability. 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. Slope stability evaluations by limit equilibrium and. With the exception of the pile bearing capacity module, all modules can perform deterministic analyses as well as a probabilistic analyses. 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. 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.
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. The main soil parameters were obtained from the laboratory tests and two more sets of parameters were assumed for parametric studies. Conventional methods of rock slope analysis conventional methods of rock slope analysis can be generally broken down into kinematic and. Comparison of slope reliability methods of analysis.
Advanced seismic slope stability analysis springerlink. Jul 23, 2014 the analysis of slope stability is an important aspect of research in disaster reduction engineering. 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. 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.
Chapter 10 slope stability analysis nysdot geotechnical page 106 january 21, 2014 design manual 10. The limit equilibrium method is the most common approach for analyzing slope stability in both two and three dimensions. Slope stability verification manual deep excavation llc page 11 e. Chapter 10 slope stability analysis nysdot geotechnical page 1011 january 21, 2014 design manual 10. For more information about our slope stability analysis services or discuss your. Given how vital slope stability is to public safety, a comprehensive resource for analysis and practical action is a valuable tool. Even to this day, stability analyses are by far the most common type of numerical analysis in geotechnical engineering. Contains general background information, suitable techniques of analysis with and without the use of computers and examples of common stability problems and. Slope stability analysis, design, and repair services alpha. 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. A benchmark slope is reanalyzed and conclusions reached about their suitability for meaningful and conservative prediction of slope reliability. Taylor 1937 conceived the idea of analyzing the stability of a large number of slopes through a wide range of slope angles and.
Assessment of the stability of natural and artificial rock slopes is an important topic in the rock mechanics sciences. 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. 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 first is about the material properties of the slope model. Intro to slope stability analysis r ced engineering. 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. 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.
Introduction to slope stability analysis course no. Internal stability can be assured through project specifications by requiring granular materials with minimum gradation and compaction requirements. Pore pressure due to seepage through the fill reduces the stability of the slopes, but static water pressure. The term landslide refers to a situation of instability affecting natural slopes and involving large volumes of soil. The term landslide refers to a situation of instability affecting natural slopes and involving large.
Slope stability analysis, design, and repair services. Assessment of slope instability and risk analysis of road cut. To perform the slope stability analysis a computer program named stb2010 has been used. Slope stability analyses include static and dynamic, analytical or empirical methods to evaluate the stability of earth and rockfill dams, embankments. Slope stability analysis of embankment of jamuna river. Erik eberhardt university of british columbia geological engineeringearth and ocean sciences, ubc, 6339 stores rd.
For specific slope, stability analysis can be performer by utilize slide software from rock science or plaxis. 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. Detailed pieziometric data at multiple locations and depths within and below the slope will likely be needed. It describes the basic rock slope failure modes and methods of analysisboth kinematic and kinetic techniques. How do friction and cohesion work together to stabilize slopes. What is the best software to analyse the slope stability. Galena is one of the worlds leading slope stability analysis packages now used in 74 countries, in some of the worlds largest mining operations. Jun 25, 2014 slope stability analysis by the limit equilibrium method. Lisa and xstabl have become standard analysis tools for resource planning level and sitespecific slope stability assessments, respectively, on.
The main soil parameters were obtained from the laboratory tests and two more sets of parameters were assumed for. A major revision of the comprehensive textreference. Alpha adroit also offers consulting services for preventive and remedial measures for small scale and large scale landslides throughout alberta, british. 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. Learning outcomes gat the end of this session, the participant will be able to. However, a saturated slope with parallel seepage will be about half as steep. Whether youre involved in surface mine design or production, construction, education, or regulation, this is an important new book for your library.
The program works with the bishops method of slope stability analysis. The book also describes examples and causes of slope failure and stability conditions for analysis, and includes an appendix of slope stability charts. In the analysis of slope stability, the primary task is to calculate the safety factor of the slope 15. With a probabilistic analysis you can take into account variations in material. Rock slope stability analysis utilization of advanced. Although the vertical acceleration can be included in a pseudostatic analysis, it is rarely used in practice, as explained below. Of the software which is currently available from rocscience, half of all programs are either specifically dedicated to slope stability analysis ie. Slope stability and stabilization methods by lee w. Slope stability analysis of soil slopes using the nonvertical slice method proposed by sarma noncircular slip. Fundamentals and methods presents basic principles for the safe design of constructed or natural earth slopes. 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. Application of the finite element method to slope stability. This is in part because stability is obviously a key issue in any project will the structure remain stable or collapse. 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.
Detailed pieziometric data at multiple locations and depths within and. 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. The stability condition of slopes is a subject of study and research in soil mechanics, geotechnical engineering and engineering geology. Slope stability analysis by the limit equilibrium method.
One of the most widely used methods for this purpose is the classification of the slope rock mass. 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. 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. 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. 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. The prokon geotechnical analysis suite comprises a number of modules for analysis stability and determining capacity. Difference between simplied janbu and bishop slope. The stability analysis in the 3d space is a cumbersome process. Each one of these rock mass classification systems uses different parameters. This paper presents an analysis of soil slope stability using a terrestrial laser scanner, particle swarm optimization, and the force equilibrium method.
Make sure you understanding the different input parameters between rock slope, soil. 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 the definition of the slope failure. The slip surface is considered as circular bishop, felleniuspetterson, janbu, morgensternprice or spencer methods or polygonal sarma, janbu, morgensternprice or spencer methods. This program is used to perform slope stability analysis embankments, earth cuts, anchored retaining structures, mse walls, etc. It also highlights some of the differences in approach to that adopted by the limit equilibrium method of slices. Introduction slope stability analysis is a branch of geotechnical engineering that is highly. 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. Slope stability refers to the condition of inclined soil or rock slopes to withstand or undergo movement. Stability analysis lisa, stability analysis for road access sara, the level i1 program, and xstabl the level 111 program. Application note slope stability analysis worked example. How does the slope angle play a role in slope stability. The term slope means a portion of the natural slope whose original profile has been modified by artificial interventions relevant with respect to stability.
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. It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of. 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. 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. Using a unified approach to address a medley of engineering and construction problems, slope stability analysis and stabilization. Terzaghi 1950 first applied a pseudostatic approach to analyze seismic slope stability. Important aspects in slope stability analysis in this section, three major aspects that influence slope stability analysis are discussed. A onestop source to the understanding and application of slope stability analyses for construction and remediation projects. In the recent decades, several rock slope classification systems are presented by many researchers.
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