Deterministic and probabilistic analyses are possible. 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. With the exception of the pile bearing capacity module, all modules can perform deterministic analyses as well as a probabilistic analyses. However, the selection of the seismic coefficient employed in the analysis is often based on precedence without due consideration of the amount of seismic displacement that constitutes satisfactory performance for each particular project and without incorporating the vastly different seismic exposure for sites. 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. Pdf this study compiles the results of seismic stability analysis of an infinite slope from three methodologies, i. However, the selection of the seismic coefficient employed in the analysis is often based on precedence without due consideration of the amount of seismic displacement that constitutes satisfactory performance for each particular project and without incorporating the vastly different seismic. The method generally gives pipe weights that form a conservative envelope of those obtained from the generalized stability analysis. Several research works have been published on the slope stability in the northern tuscany central italy and particularly in the seismic areas of garfagnana and lunigiana lucca and massa.
Seismic stability of geotechnical structures like dams, embankments, solid waste landfills, etc. Reliability analysis of slope stability has attracted considerable. Our learning centre houses a variety of resources designed to help enhance your work, whether youre a practising geotechnical engineer, an academic, or a student. Safety factor sf calculation for a slope a without tension crack b with a waterfilled tension crack.
The term slope means a portion of the natural slope whose original profile has been modified by artificial interventions relevant with respect to stability. However, the use of the pseudo static method in these soils is also problematic as clayey slopes generally fail in pseudo static stability analyses i. Reliability analysis of slope stability using monte carlo. In most pseudostatic methods of analysis, the horizontal seismic force is considered without due weightage to vertical seismic force. Simplified stability analysis is based on a quasistatic balance of forces acting on the pipe but has been calibrated with results from the generalized stability analysis. This paper examines static and dynamic slope stability analysis of kaswati dam are located in bhuj region by using of geostudio 2007. The stability analysis methods satisfying only moment equilibrium may be affected by manual. S murthy textbook of soil mechanics and foundation. They are certainly major factors in cut slope stability and in the stability of fill slopes involving both internal and external slope failures. Eurocode 7 and slope design decoding the eurocodes. Slopes are more vulnerable to instability when subjected to earthquake ground shaking. Join researchgate to find the people and research you need to help. A pseudostatic method is adopted to account for the inertial forces induced in the rock mass by seismic events.
Analyses of seismic slope stability problems using limit equilibrium methods in which the inertia forces due to earthquake shaking are represented by a constant horizontal force equal to the weight of the potential sliding mass multiplied by a coefficient are commonly referred to as pseudo static analyses. The stability conditions, obtained from the previous analyses, could be used to define. A major revision of the comprehensive textreference. In most pseudo static methods of analysis, the horizontal seismic force is considered without due weightage to vertical seismic force. Kinematic analysis of seismic slope stability with a. 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. Improvement of pseudostatic method for slope stability.
This type of analysis is also utilized to determine. Second, only peak ground acceleration pga is considered, and the effects of shaking frequency and. The focus of this geotechnical analysis and design section is to present methods and guidelines. Slope stability evaluations by limit equilibrium and. Multistage pseudostatic analysis geo slope international ltd. A comparative study of pseudostatic slope stability analysis using.
The stability analysis is of a homogeneous slope subjected to a horizontal acceleration factor. Rock slope stability analysis giani, gian paolo on. The stability analysis of passive boltreinforced rock slopes under seismic loads is investigated within the framework of the kinematic approach of limit analysis theory. A case history of seismic stability analysis of an adriatic coast flysch slope has been employed to evaluate the applicability and reliability of these methods. Youre always working to be the best geotech you can be, and were here to help. Rational pseudostatic stability analysis of embankments. In this paper we investigate the probability of failure of a cohesive slope using both simple and more advanced probabilistic. Improvement of pseudostatic method for slope stability analysis. Sep 01, 2006 read stability charts for pseudo static slope stability analysis, soil dynamics and earthquake engineering on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Taylors slope stability chart for combined effects of. Fundamentals and methods presents basic principles for the safe design of constructed or natural earth slopes.
Pseudostatic stability analysis of rock slopes reinforced. Intro to slope stability analysis r ced engineering. Stability analysis lisa, stability analysis for road access sara, the level i1 program, and xstabl the level 111 program. In the present study, pseudo static limit equilibrium slope stability analysis of landfill proposed in goa is performed by considering the effects of the above parameters using conventional and rational method of selection of horizontal seismic coefficient considering the effect of vertical seismic acceleration. Is the angle between ground surface and horizontal. The limit equilibrium method is the most common approach for analyzing slope stability in both two and three dimensions. Slope stability analysis in seismic areas of the northern apennines italy. Research paper seismic slope stability analysis of. This thesis deals with slope stability evolutions carried out by commonly used limit equilibrium. Stability charts for pseudostatic slope stability analysis. In a pseudostatic slope stability analyss, a factor of safetyi fs is computed using a static limit equilibrium method in which a horizontal earthquakeinduced inertial force is applied to the potential sliding mass. Robert pyke selection of seismic coefficients for use in pseudo static slope stability analysis, 2011.
Pore pressure due to seepage reduces slope stability, but static water pressure, with. Unconventional pseudostatic stability analysis of the diezma landslide. Pseudostatic slope stability procedures are commonly used in engineering practice. 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.
Slope stability evaluations by le and fe methods iii. Slope instability may occur suddenly, as the slope is being excavated, or after the. The term landslide refers to a situation of instability affecting natural slopes and involving large volumes of soil. Probabilistic slope stability analysis by finite elements d. This study compiles the results of seismic stability analysis of an infinite slope from three methodologies, i. In the present study, pseudostatic limit equilibrium slope stability analysis of landfill proposed in goa is performed by considering the effects of the above parameters using conventional and rational method of selection of horizontal seismic coefficient considering the effect of vertical seismic acceleration. A novel unconventional pseudostatic analysis is proposed here to. 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. Research paper seismic slope stability analysis of kaswati earth dam 1patel samir k. Slope stability analysis by the limit equilibrium method. Slope stability evaluations by limit equilibrium and finite. First, the sliding mass is divided into vertical slices according to this method, which is irrational to some extent in the seismic design of slope. Pdf performancebased slope stability analysis and the pseudo.
In earthquakeprone areas, the analysis is typically run for static conditions and pseudostatic conditions, where the seismic forces from an earthquake are assumed to add static loads to the analysis. Framework to assess pseudostatic approach for seismic. Many researchers have developed new calculation methods to analyze seismic slope stability problems, but the conventional pseudostatic method is still widely. 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. Detailed pieziometric data at multiple locations and depths within and below the slope will likely be needed. Pseudostatic coefficient for use in simplified seismic. The primary purpose of slope stability analysis in most engineering applications is. 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. Pdf slope stability is an important consideration in the construction of artificial slope.
Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. They are certainly major factors in cut slope stability and in the stability of fill slopes involving. C department of the army, office of the chief of engineers, 1982. Slope stability analysis is performed to assess the safe design of a humanmade or natural slopes e. In order to account for the dynamic forces induced by ground shaking, a novel procedure is introduced in this paper to estimate slope stability under the ultimate limit state with a combination of pseudodynamic approach and discretisation technique. Detailed pieziometric data at multiple locations and depths within and. This pseudostatic force represents the destabilizing effects of the earthquakeshaking. If no important buildings are present in the sliding areas, a pseudo static method combined with the limit equilibrium method lem or finite element method fem can be used to assess the seismic slope stability. It is simple to apply and provides far more information than does pseudo. Static slope stability analysis is done by bishops simplified method and dynamic slope stability. Pseudo static analysis, because of its crude characterization of the physical process, should be used only for preliminary or screening analyses. Pseudostatic stability analysis of msw landfills in goa. The pseudo static ps approach is still the most common procedure employed for standard, seismic slope stability evaluation. Lisa and xstabl have become standard analysis tools for resource planning level and sitespecific slope stability assessments, respectively, on.
Missouri university of science and technology scholars mine. Assessing submarine slope stability requires estimating the likelihood, extent, and impact of a. 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 prokon geotechnical analysis suite comprises a number of modules for analysis stability and determining capacity.
Submarine slope failures can occur in such areas and create soil slides. The reliability of the pseudostatic method in natural clayey slopes is. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability. Probabilistic slope stability analysis by finite elements. In order to account for the dynamic forces induced by ground shaking, a novel procedure is introduced in this paper to estimate slope stability under the ultimate limit state with a combination of pseudo dynamic approach and discretisation technique. Hi all, according to wsdot getechincal design manual6. The pseudo static method of analysis, like all limit equilibrium methods, provide the factor of safety but. In the past, taylors stability chart for a homogeneous cohesivefrictional soil slope has been extended to consider the effect of horizontal seismic force only. A comparative study of pseudostatic slope stability. Slopew can effectively analyze both simple and complex problems for a variety of slip surface shapes, porewater pressure conditions, soil properties, and loading conditions. Soil stability, slope, pseudo static, newmark block sliding. Rock slope engineering civil engineering i am menglim.
Pseudostatic coefficient for use in simplified seismic slope. Submarine slope stability executive summary background and context oil and gas developments often require placing equipment, e. The pseudostatic ps approach is still the most common procedure employed for standard, seismic slope stability evaluation. Seismic slope stability international journal of computational. Slope stability united states army corps of engineers.
Introduction to slope stability analysis course no. Threedimensional seismic slope stability assessment with. A catalogue record for this book is available from the british library library of congress cataloging in publication data rock slope engineering. Approaches commonly used to assess the seismic stability of slopes range from. The logical approach to limit equilibrium slope stability problems is to factor strength, thus ec7 makes little change ec7 defines the minimum required levels of safety, it may be necessary to use higher partial factors decoding eurocode 7 book published autumn 2008. In this paper we investigate the probability of failure of a cohesive slope using both simple and more advanced probabilistic analysis tools. Pdf performancebased slope stability analysis and the. Static analysis include static slope stability method include limit equilibrium analysis and stress deformation analysis. Stability analysis an overview sciencedirect topics.
In this paper, two drawbacks of the traditional pseudostatic method vertical slice method in the slope stability evaluation have been studied. Learning be your best geotech with help from rocscience. With a probabilistic analysis you can take into account variations in material. Slope stability analysis slopew is the leading slope stability software for soil and rock slopes. Research paper seismic slope stability analysis of kaswati. Symbol parameter dimensions f factor of safety against sliding along sheet joint calculated. Chapter 10 slope stability analysis nysdot geotechnical page 104 january 21, 2014 design manual 10. Geological survey, can regionally evaluate threedimensional slope stability throughout the digital elevation model dem utilizing 3d method of columns approach reid et al.
May 15, 2014 in this paper, two drawbacks of the traditional pseudo static method vertical slice method in the slope stability evaluation have been studied. In earthquakeprone areas, the analysis is typically run for static conditions and pseudo static conditions, where the seismic forces from an earthquake are assumed to add static loads to the analysis. Multistage pseudostatic analysis geoslope international. Gb 5033020 recommends seismic stability analysis for permanent slopes in earthquake zones where the basic intensity is 7 or greater. One challenge in slope stability analysis is how to locate the potential sliding surface. Reliability analysis of slope stability using monte carlo simulation and comparison with deterministic analysis r. Carrara districts, aimed at analysing the slope stability under static and dynamic conditions and mapping the landslide hazard 16, 5, 6, 9. A staged pseudo static analysis involves the completion of two stability analyses for every single slip. Read stability charts for pseudostatic slope stability analysis, soil dynamics and earthquake engineering on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Sep 09, 2009 pseudostatic slope stability procedures are commonly used in engineering practice. In seismic slope stability analysis, a conventional procedure, pseudostatic slope. Framework to assess pseudostatic approach for seismic stability of. This approach is a generalization of common limiting equilibrium le slope stability analysis in which earthquake effects are represented by an equivalent static force, the magnitude of which is a product of a seismic coefficient k and the weight of.
Selection of seismic coefficients for use in pseudostatic. Reliability analysis of slope stability has attracted considerable research attention in the past few decades 610. Slope stability analysis in seismic areas of the northern. Robert pyke selection of seismic coefficients for use in pseudostatic slope stability analysis, 2011. Selection of seismic coefficients for use in pseudostatic slope stability analyses. Seismic coefficients for pseudostatic slope analysis. In earthquake engineering to analyze the seismic response of soil embankments and slopes simply adding a permanent body force representing the earthquake shaking to a static limitequilibrium analysis. Values of f for stability analyses are determined from laboratory tests or estimated from correlations. Such indications are commented in the light of the italian and european prescriptions for seismic stability analysis with pseudo. Home about us journals books compilations open access authors. It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of.
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