Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. What is galena galena is a powerful, comprehensive and userfriendly slope stability analysis system developed by practising engineers for engineers. 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. Application of the finite element method to slope stability. Slope stability analysis 1 slope stability analysis for landfills and embankments geotechnical design cgn 4801 by kamal tawfiq, ph. Rock slope stability analysis utilization of advanced. Slope stability evaluations are concerned with identifying critical geological, material, environmental and economic parameters, that will. Lisa and xstabl have become standard analysis tools for resource planning level and sitespecific slope stability assessments, respectively, on. Safety factor sf calculation for a slope a without tension crack b with a waterfilled tension crack. Global stability with relict slip surface in this scenario, the presence of the relict slip surface was assumed. The resistance of a sloping earth mass to failure or movement is termed its stability. Innovative solutions for slope stability reinforcement and. This course provides systematic instruction in soil slope stability analysis related to typical nrcs work, including earth embankments, streambanks, excavated slopes, and landslide stabilization.
A more general model for the analysis of the rock slope. Cm0 moment coefficient at zerolift cm 0 balance cl 0 the model flies. The factor of safety of the plane failure analysis is obtained. Robustness ability to perform successfully under a wide range of conditions. Symbol parameter dimensions f factor of safety against sliding along sheet joint calculated. Alpha adroit also offers consulting services for preventive and remedial measures for small scale and large scale landslides throughout alberta, british. Slope stability, slope stability analysis deep excavation.
Ppt slope stability analysis powerpoint presentation. The material profile defining the gravel is redefined from a twopoint horizontal line above the slope to follow the slope surface, with an excavated pad for the wall. 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. This was applied in the model by selecting all the boundary lines between the mudstone and weathered mudstone unshow the water table, to facilitate. 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. 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 fields.
The original slope surface is shown in the image as a black solid line, and analysis determined the factor of safety for the original slope to be above 2. 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. 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. Planar failure analysis a block is rest on a slope having angle. Important aspects in slope stability analysis in this section, three major aspects that influence slope stability analysis are discussed. Calculation of deformations at slope stress levels, and 5.
The citadel is situated on the fortress hill and it is the only inhabited fortress in romania. Rock slope stability analysis hardcover january 1, 1992 by gian paolo giani author see all formats and editions hide other formats and editions. However the minimum constructive elements provided in the program do not allow the software to perform analysis for complex cases. Application note slope stability analysis worked example. New methods and insight, second edition provides helpful practical advice and design resources for the practicing engineer. In civil engineering, projects include transportation systems such as highways and railways, dams for power production and. Pdf rock slope stability assessment by using kinematic. 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. Fundamentals and methods presents basic principles for the safe design of constructed or natural earth slopes. Slope instability may occur suddenly, as the slope is being excavated, or after the slope has been standing for some time. In the project level property editor, under water table set use r u coefficientto true, the av. 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. Rock slope stability analysis lec 1 linkedin slideshare. Rock slope stability analysis a variety of engineering activities require excavation of rock cuts.
Negative slope stability the curves slope is also the strength of the stabilizing force high slope stable sailplane. 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. It can be used mainly for preliminary analysis of slopes since it can provide an estimate of the factor of safety with minimum effort from the user. Application note slope stability analysis worked example 4. Evaluation of minimum factor of safety in slope stability analysis zuyu chen and changming shao institute of water consetvanc and hydroelectric power research, p. 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. Stability analysis lisa, stability analysis for road access sara, the level i1 program, and xstabl the level 111 program. Despite the widespread availability of software programs using sophisticated numerical methods, the physical principles of slope engineering should not be forgotten. 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 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. 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. How does the slope angle play a role in slope stability.
Using a unified approach to address a medley of engineering and construction problems, slope stability analysis and stabilization. Rock slope stability analysis utilization of advanced numerical techniques dr. It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of. The increasing of r causes the increasing of the stability of the rock slope. The term slope means a portion of the natural slope whose original profile has been modified by artificial interventions relevant with respect to stability. Application note slope stability analysis worked example 2.
Slope stability analysis by the limit equilibrium method. This paper presents an analysis of soil slope stability using a terrestrial laser scanner, particle swarm optimization, and the force equilibrium method. Simslope stands for simplified slope stability analysis software. Stability analysis of rock slopes using the finite element. The second is the influence of calculating factor of safety to slope stability and the third aspect is the definition of the slope failure. Slope stability evaluations by limit equilibrium and. Slope stability analysis, design, and repair services. The limit equilibrium method is the most common approach for analyzing slope stability in both two and three dimensions. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability. How do friction and cohesion work together to stabilize slopes. Evaluation of minimum factor of safety in slope stability. Slope stability analyses are useful in sands, silts, and normally consolidated and overconsolidated clays, but care must be taken to select the correct strength parameter.
The first is about the material properties of the slope model. For a circular failure surface, the centre of the circle is. Erik eberhardt university of british columbia geological engineeringearth and ocean sciences, ubc, 6339 stores rd. Planar failures i infinite slopes ii finite slopes ii. 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. 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. Detailed pieziometric data at multiple locations and depths within and. The term landslide refers to a situation of instability affecting natural slopes and involving large. Includes recommendations for analysis, design practice, design charts, tables, and more. 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. 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.
Pdf numerical methods in analysis of slope stability. 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. Chapter 10 slope stability analysis nysdot geotechnical page 1011 january 21, 2014 design manual 10. The course covers basic slope stability concepts, available analysis methods, shear strength testing. Slope stability analysis and mitigation measures in the. 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. Considering a slip surface, the factor of safety f m defined with respect to moment is given by. The block is considered to undergoes slippage along the plane for the value of ratio utilization of advanced numerical techniques dr. 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. Advanced seismic slope stability analysis springerlink.
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