The primary purpose of this project was to evaluate the stability of rock slopes of the vmt during potential earthquake conditions. 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. Rock slope stability assessment by using kinematic analysis and slope mass rating at bandar seri alam, johor conference paper pdf available january 2011 with 3,839 reads how we measure reads. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. Slope stability analysis at highway br153 using numerical. Rock slope stability analyses are routinely performed and directed towards assessing the safe and functional design of excavated slopes e. Rock slope stability analysis article pdf available in canadian geotechnical journal 312. Application note slope stability analysis worked example. A deterministic slope stability analysis method such the limit equilibrium. Stability analysis of rock slopes using the finite element method. Rock slope stability analysis hardcover january 1, 1992 by gian paolo giani author see all formats and editions hide other formats and editions.
This program is used to perform slope stability analysis embankments, earth cuts, anchored retaining structures, mse walls, etc. Galena is one of the worlds leading slope stability analysis packages now used in 74 countries, in some of the worlds largest mining operations. 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. This was applied in the model by selecting all the boundary lines between the mudstone and weathered mudstone unshow the water table, to facilitate.
How does the slope angle play a role in slope stability. 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. 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. These analyses are often completed using slope stability charts and the dsara deterministic stability analysis for road access slope stability program. Detailed pieziometric data at multiple locations and depths within and below the slope will likely be needed. The geological strength index, gsi, relates the failure criterion to geological observations in the field.
How to move an electrical outlet behind the tv mounting a tv to the wall part 2 duration. The probabalistic sara stability analysis for road access program is still under development. Fhwa nhi06088 6 slope stability soils and foundations volume i 6 3 december 2006 6. 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. Slope stability analyses include static and dynamic, analytical or empirical methods to evaluate the stability of earth and rockfill dams, embankments. Rock slope stability of the vmt prince william sound. Combining the current research method of rock mass parameters, to the rumei hydropower station in tibet as the background, using the finite element calculation software, and using the two section for numerical analysis, considering all kinds of conditions under the condition of the simulated stress strain and displacement, the distribution of plastic failure, comprehensive analysis and. Slope stability, rock mechanics, rock mass model, mining slope, mining geotechnics. Piles have been used successfully in many situations in order to stabilize slopes or to improve slope stability, and numerous methods have been developed for the analysis of piled slopes ito et al. Conventional methods of slope stability analysis can be divided into three groups.
Advanced seismic slope stability analysis springerlink. Key words rock slope stability 7 deterministic analysis 7 partial factors 7 probabilistic analysis 7 factor of safety 7 input parameters bull eng geol env 2000 58. Slope stability refers to the condition of inclined soil or rock slopes to withstand or undergo movement. 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. A case study from deccan traps, in mahabaleshwar, india has been studied using flac slope 5. Rock slope stability download ebook pdf, epub, tuebl, mobi.
The resistance of a sloping earth mass to failure or movement is termed its stability. An introduction to slope stability and protection j. New material contained in this book includes the latest developments in earthquake engineering related to slope stability, probabilistic analysis, numerical analysis, blasting, slope movement monitoring and stabilization methods. Slope stability analysis a large slope failure in a limestone quarry prompted golder associates to use the maptek isite system to collect and process geotechnical data for stability analysis. Slope stability verification manual deep excavation llc page 11 e. Fundamentals and methods presents basic principles for the safe design of constructed or natural earth slopes. Symbol parameter dimensions f factor of safety against sliding along sheet joint calculated h height of the overall slope or of each bench 60 m or 20 m respectively. Most slope stability analysis computer programs are based on the limit equilibrium concept for a two or threedimensional model. The factor of safety of the plane failure analysis is obtained.
Rock slope stability analysis, p giani, 1992 scribd. The stability condition of slopes is a subject of study and research in soil mechanics, geotechnical engineering and engineering geology. Rock slope stability analysis ubc eoas university of british. The effect of spacing of rock bolts on the stability of. In civil engineering, projects include transportation systems such as highways and railways, dams for power production and water supply, and industrial and urban development. In the vast majority of slope stability analysis cases, geotechnical engineers primarily conduct design based on calculated factor of safety values.
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. Critical observations about the slope have been discussed in the paper index termsslope stability, rock mechanics, numerical. Simple failure mechanisms using uniform rigid rockblock motions are incorporated in the yield design kinematic approach. It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of. Rock slope stability analysis a variety of engineering activities require excavation of rock cuts. 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. 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.
Surface condition rating scr and the structure rating sr combine to give a more precise. 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. 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. Maximum slope angle and height is controlled by the concentration and orientation of joints and by seepage. The slope is composed of the serra geral formations material.
Stability analysis of a tetrahedral wedge that may form in a rock slope by the intersection of two planar discontinuities, the slope face, and the upper slope with or without a tension crack in the upper slope. Paul guyer is a registered mechanical engineer, civil engineer, fire protection engineer and architect with over 35 years experience in the design of buildings and related infrastructure. Slope stability analysis by the limit equilibrium method books. Application note slope stability analysis worked example 4. Pdf rock slope stability assessment by using kinematic. For an additional 9 years he was a principal advisor to.
Stability rock slopes has a prominent influence in projects such as transportation routes and open pits. In civil engineering, projects include transportation systems such as highways and railways, dams for power production and. Rock slope stability transportation research board. The slide involves a volume of more than 20 million m3.
Chapter 10 slope stability analysis nysdot geotechnical page 106 january 21, 2014 design manual 10. The increasing of r causes the increasing of the stability of the rock slope. The stability of rock slopes is an important issue in both civil and mining engineering. Rock slope stability analysis utilization of advanced. With the exception of the pile bearing capacity module, all modules can perform deterministic analyses as well as a probabilistic analyses. The types of stabilization include rock anchors, shotcrete, drainage and scaling, as well as rock fall protecting. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability. Rock slope stability analysis, p giani, 1992 free ebook download as pdf file.
Global stability with relict slip surface in this scenario, the presence of the relict slip surface was assumed. Slope instabilities on perennially frozen and glacierised rock walls. 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. The rocks present at the bridge site are heavily jointed. Stability of rock slopes norges geotekniske institutt ngi. The stability of a slope under varying conditions of stress involves vertical, horizontal, or oblique change in position of sections of the earths crust and of the engineering structures, such as highways or buildings, that may be connected with these sections. 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. The objective of the analysis was to evaluate and judge the condition and overall stability of the exposed rock, and identify where. Rock slope stability analysis giani, gian paolo on. Rock slope stability analysis lec 1 linkedin slideshare. Since, ec7 does not have a special provision for the problem of a footing on the crest of slope, the question whether it is a bearing capacity or a slope stability problem remains. Slopes in mountainous regions require cohesion 8 undrained short term slope failure in clay. Deterministic and probabilistic analyses are possible.
The slip surface is considered as circular bishop, felleniuspetterson, janbu, morgensternprice or spencer methods or polygonal sarma, janbu, morgensternprice or. 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. The factor of safety is a very useful index for determining how close or far away a slope is from failure, and its accuracy is consistent with the accuracy of geotechnical input data. A deterministic slope stability analysis method such the limit equilibrium lem or finite element method fem is needed as the basis of a probabilistic slope analysis. Simple failure mechanisms using uniform rigid rock block motions are incorporated in the yield design kinematic approach. They are certainly major factors in cut slope stability and in. A more general model for the analysis of the rock slope stability 435 property of the sliding surface increases from a minimum of the joint shear strength to a maximum value of the intact rock shear strength.
The slip surface is considered as circular bishop, felleniuspetterson, janbu, morgensternprice or spencer methods or polygonal sarma, janbu, morgensternprice or spencer methods. Comparison of slope reliability methods of analysis. Field reconnaissance and a detailed fracture survey of the rock slopes were conducted by dr. The choice of deterministic slope stability analysis method also determines how spatial variability can be included. Stability analysis of rock slopes using the finite element. How do friction and cohesion work together to stabilize slopes. Detailed pieziometric data at multiple locations and depths within and. Air force weapons laboratory, albuquerque, nm fhwa 1991 rock slopes.
It also describes survey and measurement methods to model the behaviour of rock masses. An existing cut slope on highway rs471br153 is studied. Slope stability assessment of an open pit mine using 3. The groundwater analysis is run first, followed by the slope stability analysis. A more general model for the analysis of the rock slope. Changing slope geometry 1 natural slopes hard massif rocks. Tagasoft geotechnical software slope stability analysis. The prokon geotechnical analysis suite comprises a number of modules for analysis stability and determining capacity.
Deals with the methods of assessing the stability of rock. Stability analysis of a rock slope in himalayas 3 fig. This paper presents an analysis of soil slope stability using a terrestrial laser scanner, particle swarm optimization, and the force equilibrium method. Slope stability analysis by the limit equilibrium method. On civil projects, rock cuts must be safe from rock falls and largescale slope instability during both construction and operation. Results method factor of safety bishop simplified 1. Numerical methods have become very popular in recent years for stability analysis of rock slopes. The limit equilibrium method is the most common approach for analyzing slope stability in both two and three dimensions. Pdf stability analysis of a rock slope in himalayas. Usdot federal highway administration, usa giani jp 1992 rock slope stability analysis. Rock slope stability analysis transportation research board. A numerical analysis of the slope is carried out in two dimensions.
If the probability density function of the performance function is known or estimated in advance, importance sampling harbitz 1983, shinozuka 1983 can be used to reduce the number of mcs simulations needed. The following table and screen captures summarize the analysis results. A more general model for the analysis of the rock slope stability. With a probabilistic analysis you can take into account variations in material.
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