Slope stability analysis using equivalent mohrcoulomb and. Unified overload method of slope stability analysis based on. Evaluation of minimum factor of safety in slope stability analysis zuyu chen and changming shao institute of water consetvanc and hydroelectric power research, p. Study on slope stability of earthen dams by using geostudio software. 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 stability of a potentially unstable rock slope was analyzed based on the presented method at the end of this paper. The clear presentation of the principles of slope stability analysis ensures that this. The method assumes a perfectly plastic material which obeys the druckerprager yield criterion and its. Slope stability analysis under seismic load by vector sum. A good knowledge of the mechanism of slope failure in opencast mines can be understood by evaluating the intrinsic and extrinsic factors and their interactions in causing slope instability, and by gathering displacement information from periodical monitoring.
They are certainly major factors in cut slope stability and in the stability of fill slopes involving both internal and external slope failures. Jun 03, 2002 conventional slope practice based on the factor of safety cannot explicitly address uncertainty, thus compromising the adequacy of projections. One of the softwares that can analyze rock slope stability in a nu. Design of overall slope angle and analysis of rock slope. How do friction and cohesion work together to stabilize slopes. Assessment of slope instability with effects of critical. Manual em 111021902, department of the army, corps of engineers, washington, dc. The slope stability can be analyse nowadays by using a computer program. Pdf a stability analysis of slopes based on a translational mechanism of failure is presented. Evaluation of minimum factor of safety in slope stability analysis. Graphical output is included to illustrate deformations and mechanisms of failure.
For all examples, a short statement of the problem is given first, followed by a presentation of the. Today, there are several methods for slope stability analysis, each has its own advantages and disadvantages. Ubiquitous joint model, which is an anisotropic plasticity model that includes weak. Reliability analysis of slope stability has attracted considerable research attention in the past few decades 610. In slope stability analysis, the limit equilibrium method is usually used to calculate the safety factor of slope based on mohrcoulomb criterion. Application note slope stability analysis worked example 4.
Slope stability analysis slopew is the leading slope stability software for soil and rock slopes. Discussion of probabilistic seismic slope stability. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability. Slope stability analysis basics explore site geology characterize soil shear strength construct slope stability model establish seepage and groundwater conditions select loading condition locate critical failure surface iterate until minimum factor of safety fs is achieved. Limit equilibrium analysis of slope stability is comprised of two coupled problems. Methods of stability analysis cover simple formulas for determining the factor of safety. What are the factors that influence slope stability. To overcome its shortcomings, this paper combined hoekbrown criterion and limit equilibrium method and proposed an equation for calculating the safety factor of slope. Earthquake effects are considered in an approximate manner in terms of seismic coefficient. Excavation slope instability may result from failure to control seepage forces in and at the toe of the slope, too steep slopes for the shear strength of the material being excavated, and insufficient shear strength of subgrade soils. Reliability analysis of slope stability using monte carlo. The limit equilibrium method is the most common approach for analyzing slope stability in both two and three dimensions. The state of the effective stresses in a slope is calculated by the finite element method using eight.
The term landslide refers to a situation of instability affecting natural slopes and involving large volumes of soil. Slope stability analysis by finite elements geotechnique. Compared with traditional methods, the threedimensional 3d safety factor acquired through. Drescher effect of elevated temperatures on hightensilesteel wires for. The normal force equation is of the same form for all methods with the exception of the ordinary method. Comparison of slope stability methods of analysis canadian. Probabilistic slope stability analysis for practice. 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. Numerical analyses methods are the most common ones that are used for rock and soil slope analyses. Threedimensional 3d slope stability analysis using stability charts. Article pdf available in international journal of engineering and technical research v603 march. Probabilistic techniques are rational means to quantify and incorporate uncertainty into slope analysis and design.
Geoslope international ltd, calgary, alberta, canada. A spreadsheet approach for probabilistic slope stability analysis is developed. Published examples found in reference material such as journal and conference proceedings. The stability of a potentially unstable rock slope was analyzed. Slope instability may occur suddenly, as the slope is being excavated, or after the. Unlimited viewing of the articlechapter pdf and any associated supplements and figures.
A gisbased 3d slope stability analysis method based on. Surface deformations, caused by mining activities at mine sites, are conventionally measured by using survey instruments. Analytical method for analysis of slope stability cao. Slope stability analysis using limit equilibrium method in. Importance of water next to gravity, water is the most important factor in slope stability. These lecture notes introduces the field of rock slope stability analysis and the purpose such. Finally, several case studies of slope stability analysis are summarized. Slope stability analysis by the limit equilibrium method books. International journal of science, engineering and technology research ijsetr.
Conventional methods of slope stability analysis can be divided into three groups. Lisa and xstabl have become standard analysis tools for resource planning level and sitespecific slope stability assessments, respectively, on. Important aspects in slope stability analysis in this section, three major aspects that influence slope stability analysis are discussed. Research paper seismic slope stability analysis of kaswati. This was applied in the model by selecting all the boundary lines between the mudstone and weathered mudstone unshow the water table, to facilitate.
Research paper seismic slope stability analysis of. We apply a linear modal analysis to this basic state to demonstrate that for a fixed prandtl number and slope angle, two independent dimensionless parameters are sufficient to describe the flow stability. Detailed pieziometric data at multiple locations and depths within and. Safety factor sf calculation for a slope a without tension crack b with a waterfilled tension crack. Fast lagrangian analysis of continua of numerical modeling technique is used to predict the stressstrain behavior of pit slope and to evaluate the stability analysis of open pit slope. 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 by the limit equilibrium method. The study proposes a geographic information systems gisbased slope stability analysis method assuming a normal stress distribution acting on the slip surface. Pdf importance of slope stability problem is the reason why so many alternate methods have been developed for evaluating the safety of a slope. Application of the finite element method to slope stability. An overview on methods for slope stability analysis ijert. Slope stability analysis slope stability analysis stabilizing a slope using antislide piles stabilizing a slope using antislide piles inputting geometry by importing data from a dxf file inputting geometry by importing data from a dxf file using standards and analysis settings using standards and analysis settings importing data in txt format. Abstract an approach using strength reduction factor srf for finite element analysis, with the provision of a failure criterion, and incorporation of graphical output, to examine the failure zone developed, was used in order to determine slope failure and the corresponding safety factor. Mar 21, 2016 15 slope stability in slope stability analysis we determine the factor of safety as a ratio of resisting forces to driving forces fs resisting driving theoretically, any slope with a factor of safety less than one will fail and any slope with a factor of safety greater than one will not. The calculation of slope stability safety factors is a routine practice. Both use a plasticity criterion and the concept of safety factors for quantifying the security level. The most common engineering methods for analyzing slope stability are the limit equilibrium method or method of slices, and the finite element method, using a strength reduction factor bri 04. Static slope stability analysis is done by bishops simplified method and dynamic slope stability.
Jun 14, 2019 grenon m, caudal p, amoushahi s, turmel d, locat j 2017 analysis of a large rock slope failure on the east wall of the lab chrysotile mine in canada. This program is used to perform slope stability analysis embankments, earth cuts, anchored retaining structures, mse walls, etc. In static upstream slope stability analysis that can achieve minimum factor of safety is 2. Linear stability of katabatic prandtl slope flows with. Slope stability analysis in that paper they conclude a methodology of slope stability analysis and provide an insight into the basic of constant affected by change in relationship for shearing stress and resistance. Symbol parameter dimensions f factor of safety against sliding along sheet joint calculated. The first is about the material properties of the slope model. Mar 10, 2020 the study proposes a geographic information systems gisbased slope stability analysis method assuming a normal stress distribution acting on the slip surface. Rock slope stability analysis ubc eoas university of british. Slope stability analysis for undrained loading conditions. Analytical techniques problems in applying stability analyses to natural slopes variability in factors influencing slope stability sensitivity analyse. A gisbased 3d slope stability analysis method based on the.
To suggest mathematical tools for slope stability analysis. Fundamentals and methods presents basic principles for the safe design of constructed or natural earth slopes. Simplified assumptions in 2d slope stability methods have led to factors of safety that differ from the more rigorous 3d slope stability analysis methods. I issue iiiapriljune, 2012305308 research paper seismic slope stability analysis of kaswati earth dam 1patel samir k. International journal of advanced engineering research and studies eissn22498974 ijaersvol. Two kinds of failure surfaces are considered in this study. The second is the influence of calculating factor of safety to slope stability and the third aspect is the definition of the slope failure. Surface deformations, caused by mining activities at mine sites, are conventionally measured by using survey instruments such as levels. Evaluation of minimum factor of safety in slope stability. An overview on methods for slope stability analysis. The factor of safety equations are written in the same form, recognizing whether moment and or force equilibrium is explicitly satisfied. 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.
The slip surface is considered as circular bishop, felleniuspetterson, janbu, morgensternprice or spencer methods or polygonal sarma, janbu, morgensternprice or. Slope stability analysis using slicewise factor of safety. How does the slope angle play a role in slope stability. Box 366, beijing, peoples republic of chitla received september 1, 1987 accepted april 11, 1988. Box 366, beijing, peoples republic of chitla received september 1, 1987 accepted april 11, 1988 this paper explores the feasibility of using optimization methods to search for. The effect of water on cut and fill slope stability is briefly discussed below. In this section, three major aspects that influence slope stability analysis are discussed.
Among various methods currently available for slope stability analysis. Conventional slope practice based on the factor of safety cannot explicitly address uncertainty, thus compromising the adequacy of projections. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. A major revision of the comprehensive textreference.
Reliability of slope stability is frequently measured by reliability index, and slope failure probability, p f, which is defined as the probability that the minimum. Stability analysis method for rock slope with an irregular. Seismic mitigation of embankment by using dense zone in subsoil, emirates journal. The paper describes several examples of finite element slope stability analysis with comparison against other solution methods, including the influence of a free surface on slope and dam stability.
At present, there are roughly four methods for seismic stability analysis of slopes. Pdf an overview on methods for slope stability analysis. Slope stability analysis sidle 1985 water resources. Stability analysis lisa, stability analysis for road access sara, the level i1 program, and xstabl the level 111 program. Stability of slopes is a very serious issue in the field of geotechnical engineering. Application note slope stability analysis worked example. 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.
Comparative study of slope stability analysis using. Grenon m, caudal p, amoushahi s, turmel d, locat j 2017 analysis of a large rock slope failure on the east wall of the lab chrysotile mine in canada. An analytical method is presented for analysis of slope stability involving cohesive and non. Hounsa hebei university of technology, tianjin, china abstract the stability of earthworks cuttings, embankments, dikes and natural slopes. In practice, 3d analysis of slope stability is not performed unless the geometry of the slope is very complex and complicated or the failure mechanism is compound. However, mohrcoulomb criterion is restricted to the description of rock mass. Pdf slope stability analysis based upon the linear. Study on slope stability of earthen dams by using geostudio software, international journal of advance research, ideas and innovations in technology, apa d.
Slopew can effectively analyze both simple and complex problems for a variety of slip surface shapes, porewater pressure conditions, soil properties, and loading conditions. The paper compares six methods of slices commonly used for slope stability analysis. Detailed pieziometric data at multiple locations and depths within and below the slope will likely be needed. It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of.
Analyzing slope stability by the limit equilibrium method. Rock slope stability analysis utilization of advanced numerical techniques. This paper describes a technique for computing optimal upper bound slopes stability factors based upon the linear matching method. Rules of thumb and easy method of estimating slope stability geology and soils information needed from site or soils database check appropriate loading conditions seeps, rapid drawdown, fluctuating water levels, flows select values to input for. Pdf 1293 k pdf plus 324 k discussion of probabilistic seismic slope stability analysis and design 1. Intro to slope stability analysis r ced engineering. Pooneh shah malekpoor, a reza jamshidi chenari, b sina javankhoshdel c. Comparing with the result obtained through the limit equilibrium method, the presented method was proved to be more accurate and suitable for stability analysis of rock slope with a thin shear plane. Therefore, slope stability analysis under seismic load is more complex than that under static load.
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