Measurement on ground based slope stability radar ssr. Limit equilibrium analysis of slope stability is comprised of two coupled problems. Where this has been done, the peat failure is usually treated as a translational planar slide and a simple infinite slope analysis is used to back calculate strength parameters of the slope at the time of failure hendrick, 1990. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. In the first stage, the exceedance probability of the horizontal pseudostatic acceleration is evaluated. Our programs include software for 2d and 3d soil and rock slope stability, limit equilibrium and finite element analysis, and 2d and 3d.
The first is about the material properties of the slope model. Slope stability analyses include static and dynamic, analytical or empirical methods to evaluate the stability of earth and rockfill dams, embankments. Limit analysis and stability charts for 3d slope failures. 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. Slope stability analyses using limit equilibrium and strength. A critical component of any stability analysis is estimation. A case study from deccan traps, in mahabaleshwar, india has been studied using flac slope 5. These lecture notes introduces the field of rock slope stability analysis and the purpose. They are certainly major factors in cut slope stability and in. The limit equilibrium method is the most common approach for analyzing slope stability in both two and three dimensions. This paper focuses on the practical procedures developed recently for the reliabilitybased assessment of slope stability. Fhwa nhi06088 6 slope stability soils and foundations volume i 6 3 december 2006 6. In this paper, a twostage method is suggested to study the seismic stability of a slope during a given exposure time.
Pdf slope stability analysis by finite elements researchgate. If the slope can be lowered the potential for slope failure drops. The rock slope design role often incorporates some degree of risk management, either explicitly or implicitly in the design of pit slopes. Slope stability verification manual deep excavation llc page 11 e.
Slope stability symposium 2018 papers 1 managing blastinduced highwall deformation using an improved signature hole technique. The stability analysis is of a homogeneous slope subjected to a horizontal acceleration. Application of the finite element method to slope stability. Rock slope stability analysis ubc eoas university of british. Slope stability evaluations by limit equilibrium and finite. Principle of slope stability analysis sliding will occur if the shear stress developed exceeds the corresponding shear resistance of the soil. Rocksoil slope stability analysis by twophase random media and. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability. The recognition and analysis of the different modes of failure are the main issues that will be addressed in this paper on the fundamentals of slope design. The idea of discretizing a potential sliding mass into slices was introduced early in the 20 th. Low efficiency and unreliability are the problems commonly encountered.
It uses plaxis, which is capable of calculating deformations rates and safety factors by gaining geometry data of a problem and soil specifications and using the finite element method fem. In this paper, authors study and discuss current methods for slope stability analysis in detail. H height of the overall slope or of each bench 60 m or 20 m respectively. The routine procedure includes comparing a number of admissible surfaces that are basically selected by random searches. The magnitude of the seismic coefficient that is applied to the. 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. Taylor 1937 conceived the idea of analyzing the stability of a large number of slopes through a wide range of slope angles and. Chapter 4 slope stability universiti teknologi malaysia. Research paper seismic slope stability analysis of. Comparative study of slope stability analysis using. Pseudostatic slope stability procedures can be employed in a straightforward manner, and thus, their use in engineering practice is appealing. Slope stability analysis by shear strength reduction method. The second is the influence of calculating factor of safety to slope stability and the third aspect is the definition of the slope failure.
Fundamentals of slope design keynote address at slope. Reliability analysis of slope stability under seismic. Slope stability best slope stability analysis software. Slope stability analysis limit equilibrium or the finite. Usually in these adaptations, the finite element method. The paper describes several examples of finite element slope stability analysis with comparison against other solution methods. This paper presents static slope stability analysis by bishops simplified method and dynamic slope stability analysis by time history method of kaswati earth dam. Mar 21, 2016 taylors stability number if the slope angle, height of embankment h, the effective unit weight of material, angle of internal friction, and unit cohesion c are known, the factor of safety may be determined. Evaluation of minimum factor of safety in slope stability. This paper presents results of comparative slope stability analyses conducted by limit equilibrium and strength reduction methods. Critical observations about the slope have been discussed in the paper index termsslope stability, rock mechanics, numerical. In static upstream slope stability analysis that can achieve minimum factor of safety is 2. These slope failures motivated the development of the slope stability radar ssr. The classical way to analysis the slope stability is accessed using two methods.
Introduction slope stability analysis forms a critical part of any open pit mining operations during the life cycle of a mining project. This program is used to perform slope stability analysis embankments, earth cuts, anchored retaining structures, mse walls, etc. A set of 5 basic slope stability problems, together with 5 variants, was distributed in the australian geomechanics profession and overseas as part of a survey sponsored by acads association for computer aided design, in 1988. This paper describes an approach for the design of piles to reinforce slopes, involving three main steps. Hamid musa paper withdrawn 23 new radarbased methods for rockfall hazard mitigation in openpit mines. Slope stability analysis of peat landslides has been undertaken in relatively few cases. Considering the importance of slope stability to their work, its beneficial for civil engineers to understand how to. In this method shear strength is considered to be reduced as less as failure occurs. 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. Fundamentals and methods presents basic principles for the safe design of constructed or natural earth slopes. Slope stability analysis by the limit equilibrium method books. When assessing stability of slopes in the face of uncertainties, it is desirable, and sometimes necessary, to adopt reliabilitybased approaches that consider these uncertainties explicitly. Detailed pieziometric data at multiple locations and depths within and. This thesis deals with slope stability evolutions carried out by commonly used limit.
Due to landslides, the himalayan region often faces geo environmental problems posing threats to, both, life and properties. As a major focus area for research and development at rocscience, our suite of slope stability analysis software is highly developed and can meet the demands of even the most advanced geotechnical projects. Morfin oral 3 an application of point estimation methods to assess open pit slope stability. Stability analysis lisa, stability analysis for road access sara, the level i1 program, and xstabl the level 111 program. In this paper, a comparison is made between 2d and 3d slope stability analyses on soil slopes where a portion of the soil profile has matric suctions. This research uses the shear strength reduction method to study soil slopes stability. The second is the influence of calculating factor of safety to slope stability and the third aspect is. The stability condition of slopes is a subject of study and research in soil mechanics, geotechnical engineering and engineering geology. Aug 22, 2018 evaluating the failure probability of a slope under the seismic condition during a given exposure time is important for performancebased assessment of slope stability. Comparison of 2d and 3d slope stability analyses for. 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.
Slope stability analysis by finite elements colorado school of mines. Paper open access related content reliabilitybased. An overview on methods for slope stability analysis. Coli posted 24 implications for other hard rock mines of slope steepening. Detailed pieziometric data at multiple locations and depths within and below the slope will likely be needed.
The slope stability can be analyse nowadays by using a computer program. 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. The slope stability analysis in geotechnical engineering is complicated its mechanism and the geological history of the slope. A case study from cortez gold mines, northeast nevada, usa. Examples of common slopes include roads for commercial use, dams, excavated slopes, and soft rock trails in reservoirs, forests, and parks. Analyzing the stability of earth structures is the oldest type of numerical analysis in geotechnical engineering. This paper research explained about slope stability of earthen dams using geostudio software. The slope stability analysis in geotechnical engineering. Reducing slope grade is a viable approach to decrease the risk of slope failure. This paper aims an overview on various methods of slope stability on the basis of assumptions, factor of safety calculation, soil conditions, soil types, applicability. Paper open access slope stability analysis under a complex. Finally, several case studies of slope stability analysis are summarized. Paper open access slope stability analysis under a.
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. Abstract landslides are one of the important natural hazards of himalaya. Slope stability evaluations by limit equilibrium and. Comparison of slope stability methods of analysis canadian. Stability analysis of soil slope, kaliyasaur village anand singh1, pankaj goswami. Taylors stability number if the slope angle, height of embankment h, the effective unit weight of material, angle of internal friction, and unit cohesion c are known, the factor of safety may be determined. Design of reinforcing piles to increase slope stability. Most past comparative studies between 2d and 3d stability analyses have ignored the effect of negative porewater pressures i. The factor of safety equations are written in the same form, recognizing whether moment and or force equilibrium is explicitly satisfied. The slip surface is considered as circular bishop, felleniuspetterson, janbu, morgensternprice or spencer methods or polygonal sarma, janbu, morgensternprice or spencer methods. Usually in these adaptations, the finite element method is combined with various schemes for strength reduction to arrive at an fos or an estimate of the additional resistance to slope failure provided by the input soil parameters. Streambank stabilization challenges in the glacial lake. Research paper seismic slope stability analysis of kaswati. How does the slope angle play a role in slope stability.
The paper compares six methods of slices commonly used for slope stability analysis. Slope stability is the process of calculating and assessing how much stress a particular slope can manage before failing. How do friction and cohesion work together to stabilize slopes. Pdf slope stability analysis methods danial salajegheh. A shallow slope can provide a planting site which is usually favorable for machine planting. 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. Slope stability analysis by the limit equilibrium method. Limit analysis and stability charts for 3d slope failures radoslaw l. Due to landslides, the himalayan region often faces geo environmental problems posing threats to. Slope stability refers to the condition of inclined soil or rock slopes to withstand or undergo movement. Rock slope stability analysis utilization of advanced numerical techniques. What are the factors that influence slope stability. In this case, failure is assumes at a certain plane w sin. Nevertheless, unexpected failures have occurred in the past and continue to do so today.
Spreadsheet for slope stability analysis spreadsheets. Earlier studies present that the analysis and assessment of slope stability should be. Rocksoil slope stability analysis by twophase random media and finite elements. This paper explores the feasibility of using optimization methods to search for the minimum factor of safety in slope stability analysis. Important aspects in slope stability analysis in this section, three major aspects that influence slope stability analysis are discussed. The paper describes several examples of finite element slope stability analysis with comparison against other solution methods, including the. Generally, in earthen dams, the factors included in this analysis are the specific site, foundation conditions, construction material characteristics and hazard potential associated with the particular site. It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of. The kinematic approach of limit analysis is explored in threedimensional 3d stability analysis of 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.