# Slope stability calculation example

At the top of the slope is a load f 20 kN/m2. 7. Surcharge Pressures on Slope for Example Problem B - Short-Term Stability Computation Series No. Using the Fellenius method of slices, determine the factor of safety, in terms . - Compute safety factor by chart 1 Dec 2006 The infinite slope failure mode is an example of an “internal” stability problem; often The method of stability analysis used (see Section 6. In this example, three slope conditions are analyzed. It provides the delegate with the knowledge, strategy and capability to inspect, understand and assess slope instability. 3, but this factor can be increased for 1. GEO-SLOPE International Ltd, Calgary, Alberta, Canada www. 6/12/2013 President Thomas A. This appendix presents design examples of the retrofitting techniques for elevation, dry floodproofing, wet . Slope Stability Analysis Examples. Questions: One Two SLOPE STABILITY EXAMPLE QUESTIONS. Table 2 shows such a typical calculation table for a slice method. com SLOPE/W Example File: Ru Bbar and Shansep soil strength (pdf) (gsz) Page 7 of 8 Using Slice 10 as an example, the total pore-water pressure will be 66. Slope stability verification problem #3 Non‐homogeneous E. or tan . Army Corps of Engineers (USACE) Engineering Manual EM 1110-2-2502 UNCERTAINTY IN SLOPE STABILITY CALCULATIONS. GSTABL7 with STEDwin v. European Commission Joint Research Centre Institute for the Protection and Security of the Citizen Contact information Address: Joint Research Centre, Via Enrico Fermi 2749, TP 480, 21027 Ispra (VA), Italy REINFORCED SOIL SLOPES AND EMBANKMENTS For the purposes of this document, a reinforced slope is defined as a compacted fill embankment that incorporates the use of horizontally placed geosynthetic reinforcement to enhance the stability of the soil structure. 27 Sep 2017 After comparison and analysis on some slope examples, the proposed method's feasibility is verified. Advancements in and The soil stress state and its changes are prerequisites of slope stability; the existing slope circular slipping method (Petterson 1916) and slice method (Fellenius 1927) ignore the impact of the stress state. Ordinary method factor of safety from SLOPE/W. Introduction to stability analysis The slope stability analysis in geotechnical engineering is complicated its mechanism and the geological history of the slope. Jul 29, 2013 · Conclusions for the practical use of the finite element method are also given. Task specification. In general it involves two steps: First, calculate the factor of safety for a specified slip surface using the method of slices. 1. 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. This report is focused on assessing safety in old slope constructions where modern slope Slope stability can be a major problem during the construction of surface facilities. Detailed pieziometric data at multiple locations and depths within and below the slope will likely be needed, ASCE Journal of Geotechnical and Geoenvironmental Engineering, Vol. Stability of slopes in open excavation in different soil condition along with the factors that control slope stability in open excavation are discussed. Traditional slope stability analysis delivers the safety factor with respect to A research paper entitled Slope Stability Analysis Methods. Mar 24, 2015 · Multiple failure criterions to evaluate the stability of a slope accounting for large-scale discontinuities have been developed. 3 CULMANN METHOD A technique for the calculation of slope stability based upon the assumption of a plane surface of failure through the toe of the slope has been proposed by Culmann (see Taylor, 1948). com The Need for Stability Analysis Stability assessment is a critical aspect of all drug development activities. There are two different ways for carrying out slope stability analyses. are still routinely used in slope stability analysis software to this day. 3. in/ Enrol today in our site https://learn. CHAPTER 10 Slope Stability Analysis NYSDOT Geotechnical Page 10-4 January 21, 2014 Design Manual 10. We have seen equation like below in maths classes. K. Determine the slope Slope Stability Analysis Basics. This simple equation obviously does not take into account such factors as fill strength or fill slope angle and does not identify the location of a critical failure The objective of this manual is to analyse the slope stability degree (factor of safety) using the Finite Element Method. Additional hand-calculations can be done by examining the details for each slice. Questions: One Two Slope stability of river dikes is investigated in a probabilistic way within this graduation project. 965° and the base length (L) is 1. This type of analysis is also utilized to determine An Example of the Use of 3D Slope Stability Analyses (and of simplified calculation of expected seismic displacements) by Robert Pyke Ph. Seller Inventory # AAH9781118651650 The stability of a slope can be evaluated using different methods and engineering practices. Pham and Delwyn G. In reality, the slope stability changes with changes in the stress state. Purpose. 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. Guang-yue Wang provided the calculation method of the design and construction technol- where m and n are the stability coefficients. 124, No. Key Questions. Slope Stability: Slope stability is an extremely important consideration in the design and influence on the stability rating for a slope which instability may be caused by physical a mechanism that is independent from those parameters. This is then induced to the active pressure calculation so that Ga = KsCaGs or KsKaCaGs. 9 (The slope would fail) Note that in practice it is likely in any detailed design that a computer slope stability program will be used. When the slope angle and height increase to a certain value, the downward trend of slope stability gradually become gentle. 2. The output varies linearly based upon the input. ing. To compute horizontal How can I determine factor of safety of slope? You can find answer to your question in any textbook on the slope stability. Slope stability analysis is an important area in geotechnical engineering. How do “friction” and “cohesion” work together to stabilize slopes? 2. The properties of soil (effective values) are shown zo-eu SSAP SOFTWARE FOR ADVANCED LEM ANALYSIS L. Limit Analysis and Stability Charts for 3D Slope Failures Radoslaw L. Before the calculation of slope stability in these methods, some assumptions, for example, the side forces and their directions, have to be given out artificially in order to build the equations of equilibrium. A. Most Critical Circle Corresponding to "Critical" Vertical Crack Depth Based on Short-Term Stability Calculations for Example Problem B. The method satisfies vertical force equilibrium for each slice. Slope stability assessment is a fundamental step in evaluating landslide hazard and for the safe design of structures and infrastructures. Steve Wright did his PhD dissertation at UC Berkeley on slope stability. (6) for the given failure surface. Figure 2. for example. φ F = 0518 • Hence F ≈ 0. Low, R. The geo-mechanical parameters needed in the calculation include the undrained shear strength (c u 1 and c u 2) and unit weight of the two soil layers. ~7! becomes singular. L. Theory of Slope Stability . For materials in which well-deﬁned structural patterns (e. The calculation of slope stability safety factors is a routine practice. What is the factor of safety and how does it apply to slope stability? In what ways does water added to a slope affect its stability? Define the following (a) angle of repose, (b) sensitive soils, (c) hydrocompacting clays, (d) groundwater, (e) quick clays ; What kinds of rock structures can reduce the stability of slopes? The finite element mesh used in the simulation of single slope stability analysis consists of (1134) 15-nodes triangular element. The paper presents the results of the comparison between two different directions in slope stability analysis for a particular example and the way these results can affect various parameters. The steepness of a slope controls many geologic processes, such as landsliding, and has major land-use implications, including slope stability and whether a slope efficiently drains rainfall or becomes a swamp. The moment is then calculated about the center of the trial surface. The term landslide refers to a situation of instability affecting natural slopes and involving large volumes of soil. May 25, 2017 · APSEd Website: https://learn. Based on the minimum F. In contrast to the conventional method, the significant feature of the proposed method is that it takes the ma-terial strength characteristics of particular slope into account in the stability calculation. (for example: place 5 feet of fill 10 feet back from the top of the slope) How should I include the surcharge forces from the fill in the slope stability analysis? I plan on using the Simplified Bishop Method (if that is an approriate method for this case). The aim of this study is to determine the factor of 9 Apr 2019 plied it to a real example – that of a landslide which resulted in human and calculation of stability of the considered slope. Task specification Determine the slope stability degree, first without the action of a strip surcharge and then under the strip surcharge New trends in rock slope stability analyses Bull Eng Geol Env (2000) 58:173–178 7 Q Springer-Verlag 175 Table1 Factor of safety calculation (figures for the probabilistic approach are mean values after truncation) conventional inverse calculation method with the strength parameters obtained by laboratory shear test . figure 2. As an everyday engineering tool, Slope software is quick and easy to use for a wide range of slope stability problems. 2 is a 2D limit equilibrium slope stability program based on STABL6 but which includes geogrid reinforcement, piers/piles, tiebacks, soil nails, applied forces, and surcharge loads. 4. c = constant and a is the slope of the line. The simplified Bishop method uses the method of slices to discretize the soil mass and determine the FS (Factor of also be used to determine the normal force at the base of a slice, giving rise to the Enhanced Overall classification of slope stability methods of analysis. This perched condition can only be properly handled by directly using the SEEP/W results in SLOPE/W. Slope Stability Analysis Geotechnical Design Manual M 46-03 Chapter 7-4 December 2006 Slope Stability Analysis Detailed assessment of the groundwater regime within and beneath the slope is also critical. First, a slope in sand This paper describes the commonly used methods of slope stability analysis by reference to the implied physical assumptions, explains the complete method, and reviews the methods of calculation adopted in slope stability computer programmes available in the U. Analysis of slope stability is very important as many structures in hilly areas failed due to instability of slope. embankments, road cuts, open-pit mining, excavations, landfills etc. Most engineers generally analyze the effects of decreasing rate of water level and permeability coefficient on the slope stability. This calculation can easily be installed in the programs shown previously. S. Borselli 3 SSAP PROGRAM The Slope Stability Analysis Program (SSAP version 4. The goal is a safety format and a set of partial safety factors, which combined ensure sufficient safety with respect to slope stability of the inner slope of river dikes. Finally, several case studies of slope stability analysis are summarized. This slope stability calculation used the simplified Bishop method, according to geotechnical parameter of table 1, the paper set up four kinds of operating mode in the slope stability analysis, as shown in table 2: For bank with a 1 to 1 slope and a soil friction angle of 30 degrees the slope factor calculates to Ks = 1. 1. 4, April 1998, pp. The simplified Bishop method uses the method of slices to discretize the soil mass and determine the FS (Factor of Safety). In this SLOPE/W example we illustrate how the stability of a deep excavation with a sheet pile wall can be evaluated. Lefebvre et al. In both examples the soil properties for the select granular fill (Class 1 Structure Backfill) are identical. is a slope stability analysis program that also incorporates features for retaining system designing. 8) Example of One Slice w/o Water Slope stability issues can be seen with almost any walk down a ravine in an urban setting. = × × = 2 16 10 25 0 027 • For slope angle 20 o read off chart either c H Fγ = 0 0139. The embankment soils for Example A; however, were chosen to provide an existing slope stability FOS of compared with the results from the GEO5 – Slope Stability program. M. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. , features such as bedding planes or Run slope stability analyses and calculate required support force for given FS For the simple infinite slope case, hand calculation is sufficient but better use slope stability software Use Lpile or similar software that allows input of soil displacements instead of loads Calculate soil reaction, deflection, bending moment, Footing on the Crest of Slope: Slope Stability 215 or Bearing Capacity? Lysandros Pantelidis and D. Of course, stability charts developed in terms of N* cannot be used for slopes with zero internal friction angle, in which case the expression in Eq. SLOPE STABILITY EXAMPLE QUESTIONS. 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 infinite slope failure mode is an example of an “internal” stability problem; often such a failure is manifested as sloughing of the surface of the slope. The factor of safety (FS) is defined as the ratio of available shear strength to strength required to maintain stability. In the past 20 years, catastrophic landfill slope failures have occurred worldwide, especially the fatal ones. - An overall stability situation is where there is loss of overall stability of the ground and associated structures, i. This offers a Slope stability analysis involves comparison of disturbing forces, due to The equation relates rock mass cohesion to the Q-rating and the intact rock density. Slope Stability Analysis Procedure Key words: dynamic programming, slope stability, stress analysis, optimization theory, limit Solutions Inc. Duncan, J. Terms of Reference: In Figure 1, an example of a slope is shown. Try it for free, without analysis restrictions. , determine whether the slope is safe or not. In Sweden and Göteborg the guidelines and recommendations set by the Swedish commission on slope stability is often used to assess slope stability. While soil nailing is also available in our DeepEX software program, SnailPlus was created to bring all the necessary capabilities into one package. This calculation is very tedious. In load-based stability analysis, the loading on the system is increased until it fails. This section contains a series of slope stability problems that have been analyzed using DeepEX software. Slope stability assessment Program: FEM File: Demo_manual_25. Slope specific parameters: • Method of excavation to be used • Expected degree of weathering at end of engineering life-time of slope SLOPE GEOMETRY Orientation Height SLOPE STABILITY ASSESSMENT Factor used to remove the influence of the method excavation and degree of weathering Factor used to assess the influence of the Module 5: Channel and Slope Stability Robert Pitt Department of Civil, Construction and Environmental Engineering University of Alabama Tuscaloosa, AL Massive Streambank Failure at New Outfall in a Suburban Area WI DNR photo Some potential solutions to stabilize streambanks. Dec 08, 2012 · The variability within soil parameters is summarized in this review. 4. The slope stability analysis was performed using the Simplified Bishop Method of slices to discretize the soil mass to establish the minimum factor of safety of the slope. Hydraulic Pressure Groundwater and/or Brine/ Seismic 3. Unstable slopes, Slope stability analyses, Shear strengths, Driving forces, Piles, Design procedure INTRODUCTION The Kansas City District, Corps of Engineers became interested in slope stabilization using piles as a result of slope stability difficulties on one of our large civil works projects, the Blue River Channel. 1 Introduction In this chapter, the basic they can be computed by hand calculation, for example, the infinite slope analysis 6 Sep 2017 Calculation examples from the literature were used to compare the new The slope stability safety factor refers to the ratio of the soil shear 13 Jun 2016 Slope stability analysis: The term slope means a portion of the natural slope This equation is easy to solve, but it was found that provides that has a minimum factor of safety. Generally, the slope stability anchoring force is calculated by using vertical slice methods. For clay soil, the stability number of a slope cut at 65°, with f = 0 is 5, if the upslope angle a = 0, Alternatively, the critical cohesion for the slope used to calculate the minimum global stability factor of safety and to perform probability analyses. 5. November 14, 2016 General Background While there is some published literature on the difference between 2D and 3D slope Nov 25, 2019 · Slope stability assessment is a crucial step in civil engineering for designing earth dams and road embankments. The base inclination (α) is 43. Students consider the balance of forces on a hillslope using the Factor of Safety by calculating shear stress and shear strength for an example hillslope and formulating an expression for the factor of safety in an Excel Slope stability analyses using limit equilibrium and strength reduction methods Various investigations [14, 24, 25] showed that it cannot be readily concluded which method gives the higher value of the factor of safety, as the analysis is dependent on the specific problem and software package used in the analysis. Most slope stability analysis computer programs are based on the limit equilibrium concept for a two-or three-dimensional model. There is no water in the slope. Figure 1. Created Date: 6/12/2014 2:43:20 PM SLOPE STABILITY EVALUATION AND ACCEPTANCE STANDARDS A. The first analysis should be done in the Slope Stability program, where the active an Given how vital slope stability is to public safety, a comprehensive resource for analysis and practical action is a valuable tool. These SIGMA/W excess pore-water pressures can be used in SLOPE/W to analyze the stability during construction and at the end of construction. 11. x is the input variable. The only SEISMIC SLOPE STABILITY Tim McCrink Seismic Hazards Mapping Program California Geological Survey 100th Anniversary Earthquake Conference Commemorating the 1906 San Francisco Earthquake April 18 – 22, 2006 The detailed discussion of the effects of earthquakes on slope stability is outside the scope of this section. Various methods are available for slope stability analysis. S. Simulating the placement of fill in SIGMA/W, for example, may create excess pore-water pressures in the foundation. y is the output which is determined by input x. 1, 2013), is the first full freeware application for LEM The purpose of this course is to show the reader that slope stability design by friction circle theory can be easily and accurately calculated by PC computer using EXCEL worksheets. Fig. xls), PDF File (. Snail Plus is our soil nail analysis software. Using this condition, the Rankine earth pressure is a function of the angle β. Two examples, A & B, are analyzed. We analyze the physical principles that underlie both the most frequently used computational methods and some less common but accurate methods. Lecture 12: Slope Stability . For example, intact rock strength is used to calculate the stability rating while a slope is unstable because of sliding on a discontinuity Slope Failure is the movement of mass on slope (falls, slides, flows) Landslide: involves an extensive area, mild slope (<20o), movement is slow and gradual. gmk The objective of this manual is to analyse the slope stability degree (factor of safety) using the Finite Element Method. , G. This document may also serve as a Determine the Factor of Safety (FS) for a soil slope. You can also apply partial factors, including EC7, with ease. stability component determination classify soil and groundwater Simplified Bishop method for slope stability. Slope Stability Calculator (last updated 12 Dec 2014) Requires Firefox 3. This broad definition encompasses many and varied applications. Morgenstern-Price Slope, a limit equilibrium slope stability analysis program, was used. 1 1 Slope stability analysis 2 1m 1m Unit of stress: 1 kilopascal kPa = 1 kN/m2 (Kilo Newtons per square meter) 1,000N Slightly above-average American male Application Note - Slope Stability Analysis Worked Example 4. The slopes of embankments and earth dams are examples of finite slopes. 1 Problem Statement A common problem encountered in engineering soil mechanics is the stability of soil slopes in frictional materials. Cutting into existing ground disturbs the mechanics of the surrounding area, which can result in landslides and rock falls. The slope length depends on the height of the dam or embankment. Application Note - Slope Stability Analysis Worked Example 1 Introduction This note describes the typical steps followed in setting up and analysing a slope stability problem with Limit-State:GEO. 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 It is a slightly modified JavaScript clone of the slope stability software STABR Ver. Slope stability is the resistance of inclined surface to failure by sliding or collapsing. 2, pp. E. 2 Slope stability analysis methods 2. and Wright, S. Gilbert, and S. The limit equilibrium method is the most common approach for analyzing slope stability in both two and three dimensions. The coefficients m and n are functions of the dimensionless number c'/gH and the depth factor D. Deep excavations usually require proper reinforcement to prevent failure. This practical reference gives you the comprehensive information you need for slope The structural elements of the wall or slope and the soil below, behind, and/or within the structure are designed together as a system. 3 Problem 2: Global stability with relict slip surface In this scenario, the presence of the relict slip surface was assumed. The problem creates a perched watertable under long term net infiltration of precipitation. A comprehensive guide for mining and construction engineers responsible for rock slope stability. Sample Design Calculations. Civilax is the Knowledge Base covering all disciplines in Civil Engineering. of effective stress, of the slope shown in Fig. - Discuss slope stability circular and block analyses. This book focuses on rock slope stability, with sections on geological data collection, geotechnical data collection and analysis, surface water and groundwater effects, kinematic and kinetic stability analysis, rock slope stabilization techniques, and rock slope instrumentation and monitoring. 5, Internet Explorer 9, or higher. What is trying to “pull” slope material down? SLOPE STABILITY 1. apsed. SnailPlus Slope Stability Analysis and Soil Nail Walls Design Software. Slope stability verification problem #4 Non‐homogeneous with seismic load F. 350-362. polyline) surfaces are [9] proposed an improved logarithmic spiral limit equilibrium method to determine the critical failure mechanism and stability of slope under the condition that Slope stability analysis using strength reduction technique zone developed, was used in order to determine slope failure and the corresponding safety factor. Fig. 48 kPa = 85. A detailed review of equilibrium methods of slope stability analysis is presented by Duncan (Duncan, 1996). 613 kPa + 18. In some circumstances, if unrealistic soil models are used, load-based stability analysis can yield meaningless results. Introduction A review has been carried out of the commercial software available Aug 06, 2014 · Download spreadsheet to calculate Slope Stability Calculation. Thus, the FS will be given by: For an infinite slope analysis, the FS is independent of the slope depth, h, and depends only on the angle of internal friction, φ, and the angle of the slope, β. The global stability analysis represents a compound failure mechanism, which provides lower calculated factors of safety. Most textbooks on soil mechanics include several methods of slope stability analysis. A number of more advanced LE methods (for example Sarma’s (1973) method and the Morgenstern-Price (1965) method) have since been developed which account for both force and moment Abstract: This chapter explores the basics of slope stability and how relative stability is calculated using a limit equilibrium approach. SIGMA/W pore-water pressures in SLOPE/W. Assignment Perform a slope stability analysis for our designed slope with a gravity wall. The minimum safety factor is 1. Slope Stability for a Cohesive and Frictional Soil 1-1 1 Slope Stability for a Cohesive and Frictional Soil 1. Please try again later. Overall external stability includes stability of the slope the wall/reinforced slope is a part of and the local A slope is judged to be safe for a design earthquake if the factor of safety is equal to or greater than 1. The wall/slope system is designed for overall external stability as well as internal stability. This is a permanent design situation. PURPOSE This Information Bulletin is to provide uniform requirements for evaluation of and standards for acceptance of stability of slopes within the City of Los Angeles. The computation of the minimum factor of safety (FS) is paramount to slope assessments because misjudgements may cause catastrophic slope failures and loss of life as reported in previous studies [1,2,3,4]. The outer boundaries of soil body of are extended to 10 B on the sides and 5 B at the bottom A slope is an inclined boundary surface between air and the body of an earthwork such as highways, cut or fill, railway cut or fill, earth dams, levees and river training work. 3 Apr 2019 To simplify the analysis process of slope stability and avoid the and stable slope examples were listed, and the limit-analysis method (LAM), 25 May 2015 A basic simplified slope stability equation is presented and used to compare the effect of the various pore water assumptions on the calculated methods (for example Sarma's (1973) method and the. Another important choice, which depends on the means that ANALYSIS OF SLOPE STABILITY USING FINITE ELEMENT METHOD MOHD YUSRI BIN SURATMAN This thesis is submitted to Faculty of Engineering, Universiti Malaysia Sarawak in fulfillment of the requirements for the award of the degree of Bachelor of Engineering with Honours (Civil Engineering) 2009 In this homework assignment students are asked to consider the balance of forces on a hill slope using the Factor of Safety. DeepEX software implements the slope stability and soil nailing analysis with Bishop, Morgenstern-Price (General Limit Equilibrium), Spencer and Swidish methods. 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. Slope stability verification problem #5 Water table modeled with weak seam G. Conventional methods of slope stability analysis can be divided into three groups: kinematic analysis, limit equilibrium analysis, and rock fall simulators. 1 Problem Statement Limit equilibrium methods are commonly used to evaluate the stability of slopes in rock or soil. example, the U. The cantilever wall The long slope of the face of a mountain is an example of this type, whereas finite slopes are limited in extent. Plan and 2D view for the finite element mesh of single slope stability and surrounded soil mass is illustrated in Fig. Slopes, Gradients, and the Angle of Repose We generally think of slope in the context of hillsides: a steep slope versus a gentle slope. Download the GeoStudio data files Read the analysis Jun 10, 2019 · The study showed that seismogram-based probabilistic analysis is a feasible way to assess slope stability. slope stability, or where excessive movements in the ground cause damage or loss of serviceability in neighbouring structures, roads or services - Typical structures for which an analysis of overall stability should Calculation of Slope Stability by Phi-C Reduction ratio between available shear strength and the mobilized shear strength in the limit state of the system [2]: ηϕ= t‰nϕ„np t‰nϕ“„m (2) ηc= c„np c“„m (3) where cis the cohesion and ϕthe friction angle. 1 OVERVIEW Slope stability analysis should be used to determine whether a proposed slope meets the required safety and performance criteria during design. Topics gTopic 1 (Section 6. Then, it calculates for this slip circle the corresponding critical seismic coefficient for which the factor of safety is 1. 5 inclination. Soil Slope Stability Analysis Using the Friction Circle Method Programmed in EXCEL has all the trig functions and the equation building capability to make the Simplified Bishop method for slope stability. constitute an important example of internal disruptive forces while the external forces mainly human activities such as excavation and filling of slopes have also caused the slide. The classical way to analysis the slope stability is accessed using two methods; the basic continuum mechanics or the limit equilibrium approach. methods of slope stability analysis. y is the output we want. y = c + ax c = constant a = slope. The above factor of safety calculation does not take into account the geometry of the slope, the distribution of weight, or the vegetation. From our review, the calculation results compares very well with our methods for both slope stability and settlement. Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. The required safety factor is SF = 1,50. The slope stability decreases with the increase of strata inclination and slope angle, and the strata inclination is the most sensitive parameter influencing the slope stability. 3 Parabolic Channel If 0 < (4 a y)1/2 < 1 Then 3. g. 10 (NCHRP Report 611, 2008 and Olson and Stark, 2003). Griffiths Abstract A footing on the crest of a slope may be considered as either a slope stability or a bearing capacity problem. useful method of presenting results of slope stability analyses. 00 meter high slope. Thereafter, the stability charts of slope In slope stability analysis, the limit equilibrium method (LEM) is commonly used For example, in soil slopes, circular or non-circular (i. The slope stability analysis is crucial in engineering practice to ensure the stability of structures and prevent loss of Free download Slope Stability Analysis Spreadsheet, method of slices slope stability analysis, slope stability analysis software free download, slope stability analysis examples, ordinary method of slices spreadsheet, slope stability analysis methods pdf, factor of safety calculation for slope stability, swedish method of slices example, slope analysis pdf, Appendix B. Infinite Slope If the backfill slope remains inclined beyond the limits of the active wedge, the backfill slope shall be assumed to extend infinitely away from the wall at an angle β. Slope Failure: limited area, steep slope, movement is fast (sometimes with no signs) The stability of a slope should be evaluated when slope movement due to additional The favorable factors for the slope stability are the decrease in , directly related to the decreasing rate of the water level , the permeability coefficient , the specific yield , and the water thickness . Key Elements of Stability 1. ▷ Shear Strength of Soils. B. The ph„ creduction stability analysis is based on an Slope Stability for a Cohesive and Frictional Soil 1-1 1 Slope Stability for a Cohesive and Frictional Soil 1. Unexpected landslides Slope Stability, Pile Foundations; This program is used for design of pile walls stabilizing slope movement or increasing safety factor of the slope. This example demonstrates how to use SEEP/W computed pore-pressures in a SLOPE/W stability analysis. e. Deep rotational failure (Nicolet, 2006) G. A more feasible algebraic expression for the calculation of slope stability anchoring force is presented herein, which is obtained from the force limit equilibrium conditions of inclined slices based on the concept of the inclined slice method. The first approach is the total stress approach which corresponds to clayey slopes or slopes with saturated sandy soils under short-term loadings with the pore pressure not dissipated. Stability number for uniform slopes ~limit analysis! Fig. in/ and get access to our study package comprising of video lectures, study material, practice questions and test Slope stability analysis is performed to assess the safe design of a human-made or natural slopes (e. SLOPE STABILITY 1. An example is shown in Figure 3, where a river is eroding the toe of a slope, and there is a swimming pool near the top of the slope. c. SOILS AND FOUNDATIONS Testing Experience Theory Lesson 06 Chapter 6 – Slope Stability. In its simple form, limit equilibrium methods are used and stability. 09 kPa, which is the same as shown in the View Slice Information. Apr 28, 2018 · Swedish Circle Method, , Mumbai University Solved Example. Gravity (Slope Angles) MANAGEMENT OF STABILITY Key Field Observations • Cracks • Seepage on Dyke Slope • Alignment Changes approach to slope stability evaluations so that they may tailor their services to meet VTrans’ goals and objectives. For example, in the special case of very gentle slope systems (of small steepness), as the unit weight data. - Explain effects of water on slope stability. 2 - GSTABL7 with STEDwin v. Example. 2001) to determine the stress states in the soil. For short-term stability analysis, undrained shear strength parameters should be obtained. D. Whether long-term or short-term stability is in view, and which will control the stability of the slope, will affect the selection of soil and rock shear strength parameters used as input in the analysis. Probabilistic slope stability analysis as a tool to optimise a geotechnical site investigation program M Zoorabadi et al. Step 3 Analyze the stability of the slope if a groundwater phreatic surface is specified in the slope. The purpose of slope stability analysis is to provide a quantitative measure of the in the overall stability, for example groundwater conditions, which may be Slope Stability is an intuitive program for the analyses of all types of slopes and retaining walls. In Fig. This feature is not available right now. 3232 m. pdf), Text File (. V. ) and the equilibrium conditions. To undertake analysis of non-circular slips, Janbu’s method is normally used. This paper also aims to focus An Example of the Use of 3D Slope Stability Analyses (and of simplified calculation of expected seismic displacements) by Robert Pyke Ph. These requirements include stability of a given slope, assessing its risk, potential failure mechanisms and velocities, areas endangered, and possible remedial measures. Extensive studies have been under- taken in this area, and a variety of these methods are available for generalized slip surfaces. In the analysis of slope stability, the primary task is to calculate the safety factor of the slope [1–5]. Soil Strength and Slope Stability is the definitive guide to the subject, proving useful both in the classroom and in the field. The slope stability can be analyse nowadays by using a computer program. Recommendations for the use of FEM in slope stability analysis . Internal stability can be assured through project specifications by requiring granular materials 4 SLIDE EXAMPLE PROBLEM #1 A two-layered slope has a cross section as shown in Figure 1 [USACE (2003)] with soil properties as given in Table 1. 2 Culmann Aproach to Slope Stability 11. GSlope Mar 02, 2016 · The construction site exists rain or continuous rain, the paper should analyze the stability of slope under abnormal conditions I. First, a slope in sand Module 5: Channel and Slope Stability Robert Pitt Department of Civil, Construction and Environmental Engineering University of Alabama Tuscaloosa, AL Massive Streambank Failure at New Outfall in a Suburban Area Some potential solutions to stabilize streambanks. It is clear however that earthquakes do influence slope stability and can lead to slope failures on a catastrophic scale (see, for example, Seed). 2 Jul 2012 Slope Stability Analysis Manual Calculations - Free download as PDF A D Slope Stability Analysis Example 1 2 start> 3 4 SLICE 5 6 7 8 9 10 Recall modes of slope failure. Slope stability analysis should consider the cases of short-term and long- Jul 23, 2014 · The analysis of slope stability is an important aspect of research in disaster reduction engineering. November 14, 2016 General Background While there is some published literature on the difference between 2D and 3D slope Slope Stability Analysis of a Rock Slope 10-1 10 Slope Stability Analysis of a Rock Slope 10. The critical slip surface is defined as the slip surface that yields the minimum value of anoptimal function. The determination of the location of the critical slip surface with the lowest factor of safety is part of the analysis. The earth body is formed of sandy clay (CS). A primary difficulty with analysis is locating the most-probable slip plane More recently slope stability radar technology has been The factor of safety with respect to strength (F) as expressed in equation A technique for the calculation of slope stability based upon the assumption of a plane. The calculator searches the circular slip surface for which the factor of safety is minimal. For example this is discussed for the finite element stress analysis program Phase2 in this article and also in Ref. Slope Stability - Example 1. The study evaluated four methods for calculating slope stability. One of the objectives of the manual is to build on accumulated knowledge to establish detailed procedures for the slope stability evaluation. For the two slope failures analyzed in their study, the data was based on a small number of geodetic prisms (four), which were taken to be representative of the unstable slope area cover-ing slope heights of up to 170 m. In order to use any of the calculation methods In this example, the safety factor of slope stability under undrained condition is calculated using Bishop's simplified method. Jahanfar Advisor: University of Guelph, 2014 Professor Brajesh Dubey Landfills have consistently, in the past as well as today, been the primary method for waste disposal. Little Consulting 12401 N Wildflower Lane Highland, UT 84003 1-925-285-1847 drlittle@dr-tom. Apr 13, 2015 · In this example it is Chart 3 • Calculate c Hγ φtan tan . Further is presented the calculation of a cantilever wall and a piling wall using software SLOPE by the Geostru. Landfill Slope Stability Risk Assessment M. Michalowski, F. 84 (MS-DOS). Abstract: We had the digital analysis study on side slope stability in order to deduce the calculation process of side slope safety factor with Janbu method and calculate the side slope safety factor of Jianshan iron mine, and put forward the effective management measures ,which achieved the ideal result Delivered over two days, this interactive training course provides a comprehensive introduction to the subject of slope stability, from initial classification through assessment and analysis to remediation. Traditional slope stability analysis is limited to the use of single valued distribution of the slope‟s characteristics to determine the slope stability from the output Assessing a slope's stability is a challenging yet important aspect of civil engineering. All require careful study of a field site, and are difficult to apply broadly. References 1. Limit equilibrium 28 May 2017 Slope stability investigation, analysis (including modeling), and design to determine relative slope stability based simply on site observations. = c + tan [c'b 4- tand(W — seca tall . Consider, for example, the free body diagram for Slice 5 (Figure 3). (2005), Soil Strength and Slope Stability (chapter 12), John Wiley and Sons Inc. ▷Ability of soil to resist sliding on itself on the slope for our use in example. G. Channel and Slope Protection • Upslope diversions • Channel Protection Evaluation of open pit mine slope stability analysis Article (PDF Available) in International Journal of Earth Sciences and Engineering 4(4):590-600 · August 2011 with 7,062 Reads Slope Stability Analysis by the Limit Equilibrium Method: Fundamentals and Methods presents basic principles for the safe design of constructed or natural earth slopes. Examples C1 through C5 are a set of examples that illustrate the elevation of a single-story home with a crawlspace. With the development of cheaper personal computer, finite element method has been increasingly used in slope stability analysis. How much value of x has impact on y is determined It performs two-dimensional slope stability analysis using the method of slices and presents the results in a clear graphical format. 6 m while match input parameters with known model behaviour. The scope of this study is to analyse the slope stability problems for varying cut slope angles. Slope Stability Analysis Stability Analyses Stability analyses were performed on eight cross sections of the proposed Mid-Barataria Sediment Diversion (MBSD) to assess the potential for stability concerns or problems along the channel alignment from the inlet system to the western end of the conveyance channel. (Stephen) Wright. 2-8, March-April, 2019. Types of soil Time during which the excavation is required to be open Allowable degree of risk of slipping which is determined based on the slope stability definition & determination guideline february 2014 3/8 procedure for establishing stability component of total setback stability component (s. Channel and Slope Stability Robert Pitt Department of Civil and Environmental Engineering University of Alabama Tuscaloosa, AL Channel and Slope Protection • Upslope diversions • Channel Protection – Channel liners –Check dams • Slope Protection – Roughening surface – Erosion control mats Slope Diversions For example, Ji-ru Zhang presented the calculation method of stability analysis at the base of practical knowl-edge and theoretical analysis of failure mode on the slope [8]. ASCE1 Abstract: The kinematic approach of limit analysis is explored in three-dimensional 3D stability analysis of slopes. Material Strength 2. Fredlund Abstract: The applicability of the dynamic programming method to two-dimensional slope stability analyses is studied. Slope stability analysis: The term slope means a portion of the natural slope whose original profile has been modified by artificial interventions relevant with respect to stability. ▷Silty sand Φ = 25 The slope stability analysis is performed with the limit equilibrium method based on By using the total definition of the safety factor, we obtain the equation:. The graphics and the ‘point-and-click’ data input are also very good and makes the program very easy to use. Oct 31, 2017 · Tag; Slope Stability Analysis Spreadsheet, method of slices slope stability analysis, slope stability analysis software free download, ordinary method of slices spreadsheet, bishop slope stability, slope stability analysis examples, factor of safety calculation for slope stability, slope stability analysis methods pdf, swedish method of slices example General Channel Stability Shear Stress Relationship The following discussion on the general shear stress relationships and channel bed movement is summarized from Engineering and Design: Channel Stability Assessment for Flood Control Projects (COE 1994; EM 1110-2-1418). 58. The forces acting on the D. Slope stability verification problem #6 Previous problem with predefined slip surface To manually carry out a slope stability analysis for a given slip surface through Simplified Bishop method, we generally begin with setting up a table with the equations embedded. 488 APSSIM 2016, Brisbane, Australia • For each material unit, the previous calculation is repeated by replacing ä Ö with ä Ö− Ö; the results would be ( 5 Ö ?. LimitState: Geo 2. By using this approach, you can evaluate the slope stability and the potential for any flow failure, however you cannot get a rough estimate of slope deformation. This powerful program can solve in seconds which used to take days or weeks to calculate by hand. Essentials in Stability Analysis and Expiry Determination Thomas A. The paper is titled, "Slope Stability Analysis Using Generalized Method of Slices" by B. documented slope stability investigations and analyses remains in the files of the government agency responsible for landslide activity. Ground-based slope stability radar Ground-based slope stability radar systems remotely measure The application of dynamic programming to slope stability analysis Ha T. Aformal derivation An example is the analysis of landslide by Haefeli (1948) Choice of Slope Stability Calculation Method. 0 – 6. Shear strength of soil can be expressed by Coulomb's equation (τ=c+σtgϕ) wherein the Example calculations for cutting in three different soil-layering profiles are documented. Our deepex software COMES PACKED WITH SLOPE STABILITY MODULE. Scheme of the assignment Solution To solve this problem, we will use the GEO5 “Slope stability” program. 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 of output of the method with its limitations. Example C6 - I. 28 Dec 2018 of soil properties on slope stability analysis in order to understand examples of submarine slope failure are observed in the geologic record. 5 z Example #12: Parabolic Channel A grassy swale with parabolic cross-section shape has top width T = 6 m when depth y = 0. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability. 5). floodproofing, and construction of a floodwall in a residential setting. ) is a function of the slope geometry and the soil, bedrock and groundwater conditions. 2 the line QS represents a plane potential failure surface. 0 and Geostudio 2007 are examples programs can be used to analyse the slope stability. Channel and Slope Protection • Upslope diversions • Channel Protection Aug 26, 2017 · Linear Regression. In order to Jun 29, 2010 · A conventional slope stability analysis involving limit equilibrium methods of slices consists of the calculation of the factor of safety for a specified slip surface of predetermined shape. It is not intended to be a comprehensive summary of all available techniques for slope stability analysis and mitigation design. Different methods were used to establish the slope stability of a 56. Little Ph. Step 4 Analyze the stability of the slope if a groundwater flow calculation is specified first to establish the phreatic surface, and then the stability of the slope is calculated. It also highlights some of the differences in approach to that adopted by the limit equilibrium method of slices. txt) or read online for free. geo-slope. The slope has a height H 10. 2. It discusses the principles of slope stabilisation as they impact on the analysis required, and makes recommendations regarding the management of slope instability risks within the context primarily of the analysis. Vertical Crack for Example Problem B - Short-Term Stability Computations. 0m and is adjusted in 1:1. Because the analysis of slope stability is statically indeterminate, the factor of safety cannot be obtained directly from the static The software in general is very good and ties in well with the way we do things here. Slope Stability - Excel Spread Sheet Example - Free download as Excel Spreadsheet (. The design and calculation method of the soil slope are given by Xiao-hua Yang [9]. slope stability calculation example