Deals with the methods of assessing the stability of rock slopes and the techniques of. Usdot federal highway administration, usa giani jp 1992 rock slope s. It is shown that the dynamic resistance of a threedimensional rock slope can be calculated by either the graphicstereonet method or the analytic vector analysis method. Determination of the safe orientation and dip of a rock. Zhang and chen, 1987, drescher and christopoulos, 1988, michalowski, 1995, yu et al. Slope stability evaluations by limit equilibrium and. 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. Hence, realistic models based on indepth understanding of structures, 3d kinematics and stability related to friction fractures, fault rock.
These discontinuities can occur as unique randomly oriented features or as repeating members of a discontinuity set. Kinematic analysis is a method used to analyze the potential for the. E xcept for the rare case of a completely unfractured rock unit, the majority of rock masses can be considered as assemblages of intact rock blocks delineated in three dimensions by a system of discontinuities. However, our recent experience with probabilistic studies of rock slope stability has indicated that the safety factor pdf tends to behave like a slightly rightskewed gamma pdf or a lefttruncated normal pdf truncated at zero, because the safety factor. Types of rock slope failures as shown in figure 151, most rock slope failures can be classified into one of four categories depending.
A systematic approach of rock slope stability assessment. Slope stability evaluations by limit equilibrium and finite. Slope stability analysis geotechnical design manual m 4603 chapter 74 december 2006 slope stability analysis. It has been suggested that the numerical models do not require further development to meet the needs of slope stability analysis. Geological model development and stability analysis. This chapter deals with rock slope stability, a subject that has shown remarkable development in the last twenty years relative to methods for estimating shear strength of rock discontihuities and methods of analysis.
Determination of the safe orientation and dip of a rock slope. Rock slope stability analysis caribbean environment programme. Slope stability analysis nysdot geotechnical page 104 january 21, 2014 design manual 10. Pm for normal condition in circular shear surface ss analysis. The phosphate is covered with the sedimentary organic limestone rocks, which are the subject of this research. 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. Stability of rock slopes geological model development and stability analysis. For all but very weak rock materials, the analysis of rock slope stability is fundamentally a twopart process.
Methodology of slope stability analysis it is a method to expresses the relationship between resisting forces and driving forces driving forces forces which move earth materials downslope. Phase2, in the analysis of slope stability problems. Rock slope stability analysis in static and dynamic fields. The dynamic stability of slopes is also treated in this report. An overview on methods for slope stability analysis. Swedge is a quick, interactive and simpletouse analysis tool for evaluating the geometry and stability of surface wedges in rock slopes. Important aspects in slope stability analysis in this section, three major aspects that influence slope stability analysis are discussed. Pdf rock slope stability analysis semantic scholar. Stability analysis of rock slopes with a modified hoek. Slope stability analysis should consider the cases of shortterm and long. Drill steel walking is going to be a large issue, also most drills are not designed to drill at such an angle. Air force weapons laboratory, albuquerque, nm fhwa 1991 rock slopes.
The significance of this study is the quantification of rock slope stability which enables the relevant agencies to appreciate the urgency of the slope stability issue. Stability analysis of rock failure modes requires information on the slope geometry, the physical properties of rock discontinuities that define the modes, and local environmental conditions such as ground water pore pressure. Fhwa nhi06088 6 slope stability soils and foundations volume i 6 3 december 2006 6. Stability analysis of rock slopes using the finite element method. Slope stability analysis is a static or dynamic, analytical or empirical method to evaluate the stability of earth and rock fill dams, embankments, excavated slopes, and natural slopes in soil and rock. Table 2 static and pseudostatic slope stability analysis description of analysis figure no. Rock slope stability analysis, p giani, 1992 free ebook download as pdf file.
Simplicity and relatively good results are the advantages of these methods. Rock slope stability analysis free download as pdf file. Detailed examples are given to illustrate both the graphical and vector methods of analysis. This paper presents a method for choosing the orientation and the dip of an excavated rock slope, to safely serve the intended function of the slope or the excavation. To read the fulltext of this research, you can request a copy directly from the authors. The comparative study among the le methods shows that bsm is as good as m.
The primary purpose of this project was to evaluate the stability of rock slopes of the vmt during potential earthquake conditions. Jan 01, 1992 rock slope stability analysis hardcover january 1, 1992 by gian paolo giani author see all formats and editions hide other formats and editions. Pdf stability analysis of a rock slope in himalayas. Aug 01, 2017 rock slope stability analysis still remains an important problem in rock engineering and many contributions have been made to address this issue e. This english edition represents an updated and revised version of the first italian edition published by the associazione mineraria subalpina of turin 1988.
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 slopes which are at risk. Stability analysis of rock slopes using the finite element. Computer modeling of catch benches to mitigate rockfall. Downslope component of weight of material including vegetation, fill material, or. The book deals with the methods of assessing the stability of rock slopes and the. Usdot federal highway administration, usa giani jp 1992 rock slope stability analysis. Hence, realistic models based on indepth understanding of structures, 3d kinematics and stability related to friction fractures, fault rock membranes are crucial.
Attachment a contains information regarding the slope stability analysis and includes five exhibits of supporting data. Rock slope stability analysis, p giani, 1992 free download pdf. Wedges are defined by two intersecting discontinuity planes, the slope surface and an optional tension crack. Pseudostatic stability analysis of rock slopes reinforced.
Slope stability analysis slopew is the leading slope stability software for soil and rock slopes. The first step is to analyze the structural fabric of the site to determine if the orientation of the discontinuities could result in instability of the slope. This system of structural discontinuities is usually referred to as. The first step is to analyze the structural fabric of the site to determine if the orientation of the discontinuities could result in instability of the slope under construction. The probabalistic sara stability analysis for road access program is still under development. Challenges in current slope stability analysis methods.
This paper aims an overview on various methods of slope. Rock slope stability analysis, p giani, 1992 pdftxt pdfcookie. Slope geometry is specified by the engineer, based on actual field conditions or on a proposed slope design plan. Detailed assessment of the groundwater regime within and beneath the slope is also critical. Over 10 million scientific documents at your fingertips.
Four slope stability examples are presented and compared to previous fem work and limit equilibrium methods griffiths, 1999 and slide 2. The book also deals with the description of survey and measurement methods used to model the mechanical behavior of rock. Detailed pieziometric data at multiple locations and depths within and below the slope will likely be needed. The book also deals with the description of survey and measurement methods used to model the mechanical behavior of rock masses and the outlining of field. These lecture notes introduces the field of rock slope stability analysis and the purpose such analyses serve in the investigation of potential slope failure mechanisms. The aznalcollar pit is dealt with in chapter 4, and in chapter 5, some conclusions and recommendations for future applications. 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. 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 stability is a tool for rock slope stability analyses planar, polygonal slip surface or rock wedge.
Slope stability analysis universita degli studi di parma. Pseudostatic stability analysis of rock slopes reinforced by. Special provision rock blasting states all rock slopes with a slope of 1v. Download rock slope stability analysis, p giani, 1992. The slope stability analysis has been prepared in accordance with the proposal dated june 2,2000. Advancements in and the evolution of computer based slope analysis techniques are discussed, first with respect to commonly applied conventional methods. The most fundamental input for rock slope failure assessment comes from the geological dataset. Various methods are available for slope stability analysis. Rock slope stability analysis, p giani, 1992 pdf document. 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 plane geometry mechanical. A summary of the slope stability analyses of the cross sections analyzed is presented below.
Pdf rock slope stability assessment by using kinematic. The investigated slope is a rock slope in an open pit mine in knifes, syria. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. Application of the finite element method to slope stability. Stability charts for rock slopes based on the hoekbrown. From an engineering viewpoint, several methods and techniques have been developed in the last decades.
Stability analysis of rock wedges with multiple sliding. Rock slope stability analysis utilization of advanced. In the vast majority of slope stability analysis cases, geotechnical engineers primarily conduct design based on calculated factor of safety values. They are certainly major factors in cut slope stability and in. Slope stability refers to the condition of inclined soil or rock slopes to withstand or undergo movement. Slope stability evaluations by le and fe methods iii instability of natural and built. If the failure mechanism of slope is not controlled by the discontinuities, the continuous numerical methods can be used to perform the rock slope stability analysis, which includes finite element.
Kinematic analysis is a method used to analyze the potential for the various modes of rock slope. Geotechnical soil and rock design parameters are required for slope stability analysis with strength parameters developed using methodologies presented in chapter 5 and the other referenced publications in section 7. Due to the advancement of various computational techniques, our ability to more accurately evaluate rock slope stability and interpret the likely failure mechanisms has improved 19. Rock slope stability analysis, p giani, 1992 pdfcoffee. Such analyses traditionally have been performed using limit equilibrium methods, but currently are frequently carried out using numerical models. This chapter deals with rock slope stability, a subject that has shown remarkable. Field reconnaissance and a detailed fracture survey of the rock slopes were conducted by dr. Slopew can effectively analyze both simple and complex problems for a variety of slip surface shapes, porewater pressure conditions, soil properties, and loading conditions. 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. Detailed pieziometric data at multiple locations and depths within and below the slope.
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