A Review on Slope Stability Analysis (original) (raw)

Review of slope stability Assessment

2017

The landslide is classified as a major risk and must deserve the maximum attention of researchers, authorities and urbanists. In geotechnical engineering, the slope stability analysis is an important problem and a difficult task. The security of slope is valued by the safety factor with many methods. there exists the analytical methods that give the theoretical bases of the analysis but generally they are limited because of theirs simplified hypothesis. The numerical methods continue to take extent because their robustness and their capability to couple various effects. This overview is the fruit of a large watch of this thematic and the target is to present a survey of the major works, methods and thematic in the slope stability analysis. The book discuss many sides related to the discipline in particular, major events through the word, causes that can be natural or human, analytical approaches as limit equilibrium, limit analysis and the semi-analytical method of slices. In numerical methods, the book presents continuum and discontinuum approaches, probabilistic, Hybrid and method based on imitation of natural process as neural network and genetic selection. Also, we will discuss the three dimension methods and show various kinds of slopes reinforcement and stabilization process.

A Comparative Study on Slope Stability Analysis by Different Approaches

2020

Slope stability analysis is of particular significance to geotechnical engineers for construction of railway embankments, canal, road embankments, earth dams, etc. Slope failures can have devastating social and commercial impacts. To assess the safe design of slopes, factor of safety values acts significant roles. Factor of safety values is used to define how close or far slopes are from failure either occurring naturally or induced by manmade activities. Traditional limit-equilibrium method is the most common technique for analysis of slope. In recent times, finite element method (FEM), a powerful, viable alternative technique is available to the geotechnical engineers. In the present investigation, an attempt has been made to study the analysis of slope based on the numerical simulation using Geo-studio software. The parameters of soil strata constituting the slope are determined from laboratory results. The main objective of the present study is to indicate the correlation betwee...

Selected components of geological structures and numerical modelling of slope stability

Open Geosciences

This paper presents the impact of selected essential aspects of geological structure on the state of slope stability as assessed by changes in the safety factor (SF). The engineering geological slope features that were analysed include: (i) changes in soil cohesion and internal friction angle, (ii) presence of a weak soil layer and its span, (iii) structural discontinuity (i.e. fault), (iv) soil permeability properties and water conditions (i.e. groundwater level, long and heavy rainfall). A certain scheme of slope stability calculations has been proposed for a case involving complex geological conditions. The numerical modelling of a hypothetic slope was performed using the shear strength reduction method based on the finite element method.

REVIEW ON SLOPE STABILITY ANALYSIS AND EVALUATION

IJEAST, 2020

Rock slope stability assessment is basically used for designing and evaluating the slope stability of the rock and mean while this is used for safety of the mine site. Rock slope hazard assessment is an important part of risk analysis for open pit mines. The main parameters that can lead to rock slope failures are the parameters traditionally used in geo-mechanical classifications, the slope geometrical parameters and external factors like rainfall and blasting. This paper presents for reviewing different methods of assessment technique and put out some referential idea through the paper.

Slope stability analysis: a kinematical approach

Géotechnique, 1995

A stability analysis of slopes based on a translational mechanism of failure is presented. The collapse mechanism is assumed to be in the form of rigid blocks analogous to slices in traditional slice methods. The proposed analysis, although based on the kinematical approach of limit analysis, always satisfies the equilibrium of forces acting on all blocks in the selected mechanism. All slope stability analyses based on the limit equilibrium of slices can be interpreted in the context of their implicitly assumed collapse mechanisms. The static assumptions made are equivalent to assuming an arbitrary strength of the soil on interfaces between slices. Solutions to stability factor yH/c from all analyses based on the limit equilibrium of slices fall into a relatively narrow range bounded by the solutions using the proposed analysis for two extreme assumptions of soil strength between the blocks. Solutions beyond this range obtained by any method of slices indicate unreasonable consequences when interpreted in the context of the failure mechanism. A convenient way to include pore pressure effects is also presented and implemented in the analysis of both translational and rotational slope collapse.

A Review of Current Methods for Slope Stability Evaluation

Importance of slope stability problem is the reason why so many alternate methods have been developed for evaluating the safety of a slope. The basic approach is determining a factor of safety against failure by sliding for a given slope. These methods differ in simplifications and accuracy. In this paper, authors study and discuss current methods for slope stability analysis in detail. These methods are grouped under the categories: Limit Equilibrium methods, Numerical analysis methods, Artificial Neural Networks, and Limit Analysis method.

Slope Stability Study in Quarries by Different Approaches: Case Chouf Amar Quarry, Algeria

IOP Publishing, 2020

The Lafarge-M'sila group's cement plant (Algeria) is supplied by the Chouf Amar limestone quarry, which allows great quarrying at the national level with annual productions of 4.2 mt / year, since several sliding in previous years have disrupted the exploitation and production of the quarry, and in the strategy of the Lafarge group increased its production up to 5mt / year in the medium term 2020-2030; a stability study is necessary to ensure production under the right conditions, the aim of our work is to study Chouf Amar stability and identify the important causes of the landslides that have influenced the site in question. We start with an empirical approach through a geomechanical characterization of the massif was put in place to highlight the instability at the level of the various rock formations. then, a stability analysis was carried out using two different approaches: the analytical approach using the limit equilibrium method (Slide 6) and the numerical approach using two methods: the finite element method (Phase 2) and the finite difference method (Flac) in the static and dynamic case considering the state of dry and wet marls. The results show an optimal state of stability on the scale of the full profile north flank of the quarry and bad stability on the scale of the bench's of the different levels and the main facies of the potential slide is that of the marls. 1. Introduction The stability of the slopes of surface mines during their exploitation is an equation with several variables (the geological conditions, the mechanical parameters and the characteristics of the networks of discontinuities), this problem imposes the continuous control of the geometrical, technological and safety parameters, the phenomenon of landslides in surface mining operations is quite frequent [1]. A landslide, if it were to occur, would cause significant damage and halt production. Before starting a stability analysis, it is important to collect the relevant information for this analysis, in sufficient quantity and precision to correctly use the chosen technique. Depending on the type of structure, the properties that most control the stability of the excavation vary. In the case of an open pit, these properties are the orientation, the dip, the spacing and the continuity of the discontinuities present in the rock mass [2] Several approaches, separated into three main categories, exist in order to analyse the stability of open slopes. Several of them make it possible to take into account many factors such as water,

A more general model for the analysis of the rock slope stability

The slope stability analysis has many applications in the engineering projects such as the dams, the roads and open pits structures. The method of analysis is usually based on the equilibrium conditions of the potential plane and wedge failures. The zone of the potential failure is stable whenever the stability forces dominate instability characteristics of the slope. In most of the classic methods of slope stability analysis, the joint surfaces are assumed to be continuous along the potential failure zone. These can cause an underestimated solution to the analysis. In this research the joint trace length is considered to be discontinuous across the potential surface of failure as it happens in nature. Therefore, there exists a rock bridge between the local joint traces. Because of the numerous problems related to the rock slope stability the above assumption is satisfied and the shear strength characteristics of intact rock have taken part in the analysis. The analysis presented here gives a better concept, view, and idea of understanding the physical nature of rock slopes and includes more parameters governing the stability of the potential failure zone.