A slope stability analysis was performed for the mine rock pile located at molycorps questa mine. Rock slope stability analysis lec 1 linkedin slideshare. A probabilistic systems methodology to analyze the. Galena slope stability analysis online slope analysis software is used for performing stability analyses of backills, road embankments, pond embankments, landslides, or natural slopes. Slope stability analysis with the finite element method indra noer hamdhan1, 2 abstract in the evaluation of slopes, the factor of safety values still remain the main indexes for finding out how close or far slopes are from failure. This engineer manual em provides guidance for analyzing the static stability of slopes of earth and rock fill dams, slopes of other types of embankments, excavated slopes, and natural slopes in soil and soft rock. Innovative solutions for slope stability reinforcement and. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes.
The rocks present at the bridge site are heavily jointed. Rock slope stability transportation research board. The probabalistic sara stability analysis for road access program is still under development. The factor of safety, f, in fe slope stability analysis duncan, 1996 is defined as shear strength of material soil or rock f shear strength required for equilibrium t t 1. Rock slope stability analysis, p giani, 1992 free ebook download as pdf file. Geomechnical parameters considered in slope stability analysis. Application note slope stability analysis worked example 4. Global stability with relict slip surface in this scenario, the presence of the relict slip surface was assumed. Innovative solutions for slope stability reinforcement and characterization.
The stability condition of slopes is a subject of study and research in soil mechanics, geotechnical engineering and engineering geology. Includes recommendations for analysis, design practice, design charts, tables, and more. Reliability analysis stability of natural slopes the possible instability of natural slopes is a major geologic hazard in many regions of the world. Slope stability refers to the condition of inclined soil or rock slopes to withstand or undergo movement. The stability analysis of a jointed rock slope with two sets of unfilled joints, under its own weight, is carried out directly by considering failure surfaces along some particular joints and also going through the intact rock. Determination of the safe orientation and dip of a rock slope in an. The probability of stability for a given slope failure mode is estimated. In rock slope stability analyses, the failure surface is often assumed to. The referenced june,2000 letter also acknowledged receipt of a proposal dated. Air force weapons laboratory, albuquerque, nm fhwa 1991 rock slopes. The book deals with the methods of assessing the stability of rock slopes and the techniques of improving the stability conditions of natural and artificial. Monte carlo simulation is a procedure to combine probability distri butions of.
The software models the factor of safety of these features using the simpliied bishop, spencer. The influence of a change in soil shear strength parameters as influenced by weathering factors. Nowadays, different approaches are available to evaluate the stability of a particular slope 1, 2, and 3. Challenges in current slope stability analysis methods. Shear strength of rock masses by back analysis of slope failures 90. Slope stability evaluation analysis of slope stability for soil slope the factor of safety has minimum value of 1. Application note slope stability analysis worked example figure 2. Pdf stability analysis of a rock slope in himalayas. The most serious disorders which can occur in slopes are 1 the sliding of blocks along the discontinuing surfaces which exist at the opening of trenches and 2 rock falls or sliding of blocks resulting from the rapid change in the mechanical characteristics of the rock bench which supports them. Rock slope stability analysis hardcover january 1, 1992 by gian paolo giani author see all formats and editions hide other formats and editions. Slope stability and erosion analysis for the sunrise mountain landfill dear mr. The degree of stability of a slope may be expressed through the factor of safety f, which is the ratio between a soil resistance measure and the associated applied load. Types of rock slope failures as shown in figure 151, most rock slope failures can be classified into one of four categories depending on the type and degree of structural control. Rock slope stability analysis gian paol giani download.
These analyses are often completed using slope stability charts and the dsara deterministic stability analysis for road access slope stability program. Rock slope stability analysis giani, gian paolo on. The slope stability analysis in geotechnical engineering. Detailed pieziometric data at multiple locations and depths within and. Slope stability model of the questa rock pile phase 2. This was applied in the model by selecting all the boundary lines between the mudstone and weathered mudstone unshow the water table, to facilitate. Evaluation of slope stability is one of the daytoday practices of geotechnical engineers. Pdf on jan 1, 2011, alavi nezhad khalil s v abad and others published rock slope stability assessment by using kinematic analysis and slope mass rating at bandar seri alam, johor find, read.
New methods and insight, second edition provides helpful practical advice and design resources for the practicing engineer. Simplified assumptions in 2d slope stability methods have led to factors of safety that differ from the more rigorous 3d slope stability analysis methods. Slope stability evaluation for the new railway embankment. Tagasoft geotechnical software slope stability analysis. Their slope stability analysis the factor of safety is 37% bigger than the cracked slope factor of safety.
Safety factor sf calculation for a slope a without tension crack b with a waterfilled tension crack. In principle, slope stability analysis is an optimization process in which the lowest factor of safety and its associated critical slip surface are sought. Upon returning to the main menu, the designer is ready to conduct the various stability analyses. The basic importance of the slope stability analysis is to avoid any inconvenience during. A slope stability analysis, in most cases, has as the primary purpose to contribute to the safe and economic design of excavations, embankments, earth dams landfills and soil heaps.
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. These slopes occur on reclaimed lands and active mine sites. Slope stability analysis is performed to assess the safe design of a human made or natural slope examples are embankments, road cut, open pit mining excavations, landfills etc. A simplified diagram of the infinite slope model, based. Slopew is a twodimensional limit equilibrium stability analysis software program that permits slope stability calculation using various limit equilibrium methods.
The goal of this task is to provide a sensitivity analysis with respect to the influence of various input parameters on the slope stability model. 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. Rockfall characterisation and structural protection a. Stability analysis of rock slopes using the finite element. Despite the advances that have been made, evaluating the stability of slopes remains a challenge 4, 5, 6, and 7. Calculation of deformations at slope stress levels, and 5. Rock slope stability analysis utilization of advanced. Galena was originally developed for mining applications, and has also been widely accepted as a valuable tool for use in civil and the broader geotechnical engineering fileds, and within teaching and research.
Rockfall characterisation and structural protection archive ouverte. Slopew can effectively analyze both simple and complex problems for a variety of slip surface shapes, porewater pressure conditions, soil properties, and loading conditions. 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. Rock slope stability analysis, p giani, 1992 scribd. Rock slope stability analysis gian paol giani deals with the methods of assessing the stability of rock slopes and the techniques of improving the stability conditions of natural and artificial slopes which are at risk. Slope stability evaluations are concerned with identifying critical geological, material, environmental and economic parameters, that will. Today, a vast range of slope stability analysis tools exist for both rock and mixed rocksoil slopes. Numerical analysis of initiation and progressive failure. Erik eberhardt university of british columbia geological engineeringearth and ocean sciences, ubc, 6339 stores rd. Analytical and numerical analyses for rock slope stability. Slope stability analysis and mitigation measures in the.
Slope stability verification manual deep excavation llc page 11 e. Slope reliability analysis considering spatially variable. Discovery ce employ civil engineers and engineering geologists with a wealth of expertise in all aspects of geotechnics including slope stability analysis and assessment. Price new from used from hardcover, january 1, 1992 please retry. The citadel is situated on the fortress hill and it is the only inhabited fortress in romania. Slope stability analysis of bench in complete construction. Symbol parameter dimensions f factor of safety against sliding along sheet joint calculated. In a probabilistic slope stability analysis the input parameters are considered as. Application note slope stability analysis worked example. Using a unified approach to address a medley of engineering and construction problems, slope stability analysis and stabilization. Slope stability analysis slopew is the leading slope stability software for soil and rock slopes. Slope stability analysis with the finite element method. There is an interesting landslide case study, have studied by nurly gofar et al.
Pdf rock slope stability assessment by using kinematic. Slope stability analyses include static and dynamic, analytical or empirical methods to evaluate the stability of earth and rockfill dams, embankments. The results of the analysis with critical failure surfaces through the rock mass show that the wall is stable and estimates the factor of safety to be 2. Slope stability wizard geometry section soil name material drainage behaviour c u c 0. Site constraints often result in new developments being constructed close to the crest of marginally stable slopes such as this development at cemex cement works in rugby. In this paper a numerical analysis of slope stability problems in blocky rock is presented with emphasis given to the various possible failure modes block sliding andor block tilting. Stability analysis of jointed rock slope sciencedirect. Simple failure mechanisms using uniform rigid rockblock motions are incorporated in the yield design kinematic approach. Slope reliability analysis considering spatially variable shear strength parameters using a nonintrusive stochastic. Rock slope stability analysis utilization of advanced numerical techniques dr. Rockfall characterisation and structural protection nat. Slope instabilities on perennially frozen and glacierised rock walls. Slopes in mountainous regions require cohesion 8 undrained short term slope failure in clay. 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.
Galena is a powerful, comprehensive and userfriendly slope stability analysis system developed by practising engineers for engineers. Rock slope stability analysis ubc eoas university of british. Stability analyses were performed using the computer program slopew, part of the geotechnical analysis software package geostudio 2012, developed by geoslope international, ltd. Usdot federal highway administration, usa giani jp 1992 rock slope stability analysis. Geotechnical slope stability of the este msw landfill. Slope stability, slope stability analysis deep excavation. Ii abstract soil slope instability concerning highway infrastructure is an ongoing problem in iowa, as slope failures endanger public safety and continue to result in costly repair work. The indicated high level of stability with respect to deepseated failure modes can be attributed to the fact that the toe of the slope is located in the stronger sulphate cemented zone. Slope stability santiago chile, november 2009 challenges in current slope stability analysis methods slope stability analysis involves comparison of disturbing forces, due to gravity and water pressure, to the available strength of the rock mass. Stability analysis of a rock slope in himalayas 3 fig. Slope stability analysis and mitigation measures in the area of the sighisoara medieval citadel the sighisoara medieval citadel has a very big importance to the cultural, architectural and historical heritage of romania. Robustness ability to perform successfully under a wide range of conditions. Gaddy and schlegel dated june,2000 enclosed is the slope stability and erosion analysis for the sunrise mountain landfill. Rock slope stability analyses are routinely conducted to allow the design of safe.
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