Slope Stability Ppt

According to Davis, geographical cycle is a period of time during which an uplifted landmass …. The typical retaining structure on forest roads is a gravity retaining wall which resists earth pressure by the force of its own weight. All of the coordinates of the ordered pairs are between -3 and 3. Civilax is the Knowledge Base covering all disciplines in Civil Engineering. , fellow asce, fellow aei contents 1. Size of dam 4. I prepared this in response to my institution’s online migration due to the COVID-19 plague. 1 EFFECTS OF WATER ON SLOPE STABILITY Very soft, saturated foundation soils or ground water generally play a prominent role in geotechnical failures in general. For an additional 9 years he was a principal advisor to. Meanwhile, the friction between an object on the slope and the slope itself is a function of the component of gravity which acts normally to the slope, F nn. Usually, slope monitoring using total station comprises of three components. Slope Stability at Present. Pavement Design. 1 INTRODUCTION The quantitative determination of the stability of slopes is necessary in a number of engineering activities, such as: (a) the design of earth dams and embankments, (b) the analysis of stability of natural slopes, (c) analysis of the stability of excavated slopes,. SLOPE STABILITY 1. • slope stability • lateral pressure • internal stability • borrow source evaluation (available quantity and quality of borrow soil) • required reinforcement • liquefaction • delineation of soft soil deposits • potential for subsidence (karst, mining, etc. • Geotechnical engineering analyses such as slope stability, settlement, bearing capacity and seepage • Development and management of instrumentation monitoring systems;. • Slope stability is the primary means of quantitatively assessing the level of stability of a slope, done using a Factor of Safety. In this criterion, we require the characteristic equation to find the stability of the closed loop control systems. Slope stability analysis should be used to determine whether a proposed slope meets the required safety and performance criteria during design. 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. Simple to say, but generally the most ignored in mineral processing. Talren v5 is a powerful tool for geotechnical professionals to conduct stability analysis of slopes with or without reinforcements. Slopes are required in the construction of highway and railway embankments, earth dams, levees and canals. In order to infiltrate the uncertainty in calculation, probabilistic. lope-Stability Model (TRIGRS) is a Fortran program designed for modeling the timing and distribution of shallow, rainfall-induced landslides. Practical Probabilistic Slope Stability Analysis Análisis Probabilístico y Práctico de Estabilidad de Taludes B. Chapter description. CRESTMOORCANYON SLOPE STABILITY PROJECT LOCAL EMERGENCY AND REPAIR CITY COUNCIL MEETING Jimmy Tan, Public Works Director February 25, 2020. Course Outline. Photos used to illustrate various types of surface slope failure. 11 - This applies the unfavourable partial factor to. Financial support for the project is provided by Boliden Mineral AB. Stability analyses: dynamic UDEC model Earthquakes with return periods of 100 and 1000 years The analyses indicate that an earthquake with a return period of 1000 years is likely to trigger a slide to great depth at the present ground water conditions and that the slope will remain stable if it is drained. GEO-SLOPE International Ltd, Calgary, Alberta, Canada www. Slope evolution is the development of slopes over time (how they change) Slope processes are the activities acting on the slopes. For dry soil, one generally assumes that the soil shears when the shear stress is equal to the shear strength of the soil. ppt [Compatibility Mode]. The term landslide refers to a situation of instability affecting natural slopes and involving large volumes of soil. F3 reflects the relationship between the slope face and the joint dip. Table 6 -1. Expected Outcomes. Financial support for the project is provided by Boliden Mineral AB. Result Analyses 5. In a more rigorous analysis, the structural component properties can be included in a stress-deformation analysis so the forces and moments in the structure can be computed along with the interaction between the structure and ground. com - id: 11cc9b-NWQ3O. Critical factors in wildfire hazard in coniferous forests: 1. THE STABILITY OF SLOPES 11. Ground Stability PowerPoint Presentations you can use in your safety training programs. Due to the huge losses that landslides imply, their prevention is of maximum importance for all the people living in the area of hazard. These allow you to do excellent things with ideas even if you only have a basic understanding of. 5×10-7cm/s at over 90%. CAUSES OF FAILURE OF SLOPES: Gravitational force Force due to seepage water Erosion of the surface of slopes due to flowing water The sudden lowering of water adjacent to a slope Forces due to earthquakes 8. The remedial measures to increase such resisting forces will depend upon the type of landslides and slope stability analysis carried out by using different methods. Hence, the LE stress method is established to analyze the slope stability by employing the double strengthreduction (DSR) technique in this work. Paul Guyer, P. It is intended to provide transportation earthwork professionals with knowledge to recognize potential problems with soil slope/embankment stability and deformation in transportation projects. Dewatering involves controlling groundwater by pumping, to locally lower groundwater levels in the vicinity of the excavation. 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. Engineers who need to maximise the area of development for earth retaining walls and structures but are faced with difficult and varied terrain can choose from a wide range of options – reinforced concrete, gabions, crib walls, sheet piling and structural brickwork, and more. Low School of Civil & Environmental Engineering, Nanyang Technological University, Singapore Abstract A practical procedure is described for implementing Spencer's method of slices with varying side force inclination. 1 INTRODUCTION 1 1. Recording a PowerPoint presentation with Zoom. Stability Testing and CLSI EP25-A A new CLSI guideline has come out with recommendations on the best way to calculate and interpret the stability of IVD reagents. GALENA is one of the world's leading slope stability analysis packages - now used in 74 countries, in some of the world's largest mining operations. Slope stability assessment is a fundamental step in evaluating landslide hazard and for the safe design of structures and infrastructures. The following images were included in a MS PowerPoint presentation used by North Carolina Geological Survey geologists from the Asheville Regional Office at many public landslide outreach meetings. Retaining Walls, Slope Stability The GEO5 Gabion program is used to verify the design of walls built from wired baskets filled with rock (gabions). Number of flow tubes = 4. The slope stability can be analyse nowadays by using a computer program. Restore Channel Floodplain Stable Riffle-Pool Formation Including Grade Control Slope Engineering Bed and Banks Vegetate for Surficial Stability SlopeStabilized, Replace Bank Treatment~ 30m Storm Outfall and Erosion Repaired SlopeStabilized, Replace Bank Treatment~ 30m. Rock slope stability analysis must understand the geological conditions as the foundation, be under the analysis to effects of geological factors of rock slope stability, be under the premise of analysis to the. Slope stability verification manual Deep Excavation LLC Page 11 E. Stability, morphology, and analysis of statistically determinate two- and three- dimensional structural systems. , Sharma, Sunil, Boyce, Glenn M. Economics and safety of excavations 3. 23 ANALYSIS OF INFINITE SLOPE WITH COMPLETELY SUBMERGED SLOPE If the slope is completely submerged, and if there is no seepage as in Fig. Deep Slope Erosion Control and Embankment Stabilization. , latex), then placed in a pressurized chamber and saturated before applying a vertical load. If the constructed or stabilised slope height exceed 6 m, QP(Geo) and AC(Geo) are also required for plan submission. Ground response analysis Name: Institution: Date: Ground response analysis Analysis of local site response is a fundamental aspect of geotechnical earthquake engineering. Very Large Landslides in Modern Times: Conceptual Model Development, Slope Stability Analysis, and Multidisciplinary Research Needs for Future Hazard. f MANAGEMENT IN ACTION - SLOPE STABILITY solution, GeoMoS, while others choose to use Leica total stations together with third-party software. SLOPE STABILITY: Design and construction of earth dams. What is the "factor of safety" equation?. Stability of enzyme-MOF composites at high temperature and in the presence of protease digestion. Slope Stability Analysis by the Limit Equilibrium Method: Fundamentals and Methods presents basic principles for the safe design of constructed or natural earth slopes. Job email alerts. Slide 2D limit equilibrium slope stability for soil and rock slopes Features of slope stability analysis Critical search. V – Geology and Construction - Bell F. It trained a selected group of Laos practitioners. Slope is an important topic for pre-algebra, 8 th grade math, and algebra. The derivations and effects of seepage forces and rapid. The slope is creeping at a slow rate (generally a few mm a year) and no structures are in danger. Seismic Slope Stability • Version 2. as a measure of slope protection. slope stability evaluation has entered a more mature phase, where experience and judgment, which continue to be of prime importance, have been combined with improved understanding and rational methods to improve the level of confidence that is achievable through systematic observation, testing, and. Landslides have always been viewed with a mixture of fascination and respect. - Give some good references for selecting appropriate factor of safety for your analysis (depends on short term, long term analysis or static vs dynamic analysis). Its acts everywhere on the earth's surface, and then pulls everything in direction towards the middle of the earth's. Slope Stability Text section 14. Department of Transportation Report Number CDOT-DTD-R-96-6, "Evaluation of Slope Stabilization Methods (US 40 Berthoud Pass)" (Price 1996). These were related to problematic, geological and groundwater conditions involving weak rocks, unfavorable orientation of rock discontinuities and high groundwater levels. The factor of safety equations are written in the same form, recognizing whether moment and (or) force equilibrium is explicitly satisfied. ppt [Read-Only]. Even then these sections are also referred to as hill roads. Relief and Slope Analysis A preliminary step to study the geomorphological features or morphometric study of any area is analysis of its relief feature. The slope of the magnitude changes by +20dB/dec at every zero frequency and by -20 dB/dec at every pole frequency. On a flat surface the force of gravity acts downward. ADVERTISEMENTS: 1. 4 The Importance of a Slope Monitoring Guideline 8. Water control is generally maintained through installation of Microsoft PowerPoint - 09 Stabilization of slope. Like this, a small slope failure and a large-scale slope failure were forecast. Formerly, the term mass wasting referred to a variety of processes by which large masses of. This means that for v > 50 the slope of the tangent lines to the velocity will have the same sign. as a measure of slope protection. Gravity Dam is constructed of concrete and/or masonry and/or laid-up stone that relies upon its weight for stability. Large, free-standing EPS embankments are generally stable for earthquakes but overall stability can be stable for earthquakes, but overall stability can be improved by including shear keys, adhesives or other mechanical or structure countermeasures. Erosion control is intended to provide surface slope stability to protect the face of the slope and to strengthen portions of the slope below. f MANAGEMENT IN ACTION - SLOPE STABILITY solution, GeoMoS, while others choose to use Leica total stations together with third-party software. The instability will be triggered by dredging sand at the toe of this steep slope. Due to the huge losses that landslides imply, their prevention is of maximum importance for all the people living in the area of hazard. Slope Stability. Computer speeds calculations 4. Part IV-6 Slope Stability. 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. The material properties used in the analyses are listed below in Table 2. 1) located in the Messina province, along the Ionian coast of Sicily (Italy). CRESTMOORCANYON SLOPE STABILITY PROJECT LOCAL EMERGENCY AND REPAIR CITY COUNCIL MEETING Jimmy Tan, Public Works Director February 25, 2020. Edil University of Wisconsin-Madison. The factor of safety equations are written in the same form, recognizing whether moment and (or) force equilibrium is explicitly satisfied. Gravity Dam is constructed of concrete and/or masonry and/or laid-up stone that relies upon its weight for stability. A multiple-week exercise on the geotechnical properties of soils and slope stability (PowerPoint 14. com - id: 11cc9b-NWQ3O. Bank Stability Governing Equations Stability of non-cohesive sediment on an angled bank (Julien 2010) = bank material friction angle (Planar (Wedge) Failure Analysis for Steep Banks (Terzaghi 1943) H c = critical bank height for slab failure (m) c’ = effective bank cohesion (kPa) α = bank angle (°). Ground response analysis Name: Institution: Date: Ground response analysis Analysis of local site response is a fundamental aspect of geotechnical earthquake engineering. Chapter 12 – Abutments January 2020 12-3 12. gst In this verification manual you will find hand-made verification analysis of the stability of slope and anchored slope in a permanent design situation. Hawaii Geological Survey Hawaii Geological Survey Coastal hazards Surface hydrology Hydrogeology Watershed erosion Wetland management Slope stability Earthquakes Volcanism Rock/sand/gravel resources Hydrothermal energy Environmental geochemistry Hawaii Geological Survey There is no state source for Earth science information, guidance, advice. Discontinuities and planes of weakness. The slope of the magnitude changes by +20dB/dec at every zero frequency and by -20 dB/dec at every pole frequency. The stability of a slope is measured by its factor of safety using geometric and. com, find free presentations research about Slope Stability PPT. Soil-rock slopes are widely distributed around the world, while the commonly adopted method by simplifying it as a uniform media tends to be excessively conservative. Advancements in computational power and numerical modelling have significantly progressed the analysis of overall slope and inter-ramp scale stability. View Shawn Hutcherson, P. Slope stability is the process of calculating and assessing how much stress a particular slope can manage before failing. Slope Stability Analysis by the Limit Equilibrium Method: Fundamentals and Methods presents basic principles for the safe design of constructed or natural earth slopes. There were several cases of slope failure along highway sections in Uttarakhand Himalaya. com SLOPE/W Example File: Probabilistic and Sensitivity. when RMR > 40 the slope stability is governed both by orientation and shear strength of discontinuities whereas for RMR < 30 the failure develops across the rock mass. Define parameters and starting point for calculations 6. They are certainly major factors in cut slope stability and in the stability of fill slopes involving both “internal” and “external” slope failures. • Avg Slope = 4. Department of Transportation Report Number CDOT-DTD-R-96-6, "Evaluation of Slope Stabilization Methods (US 40 Berthoud Pass)" (Price 1996). instrument) station. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. • Design and build for uplift pressures. Lectures by Walter Lewin. Rock Slope Stability Analysis: Limit Equilibrium Under fully drained slope condition, the water pressure is zero. Use features like bookmarks, note taking and highlighting while reading Slope Stability and Stabilization Methods. Abstract: Slope stability is affected by many factors, their effects on the slope stability may be big or small. The authors discuss three methods for identification of OOT results—the regression-control-chart method, the by-time-point method, and the slope-control-chart method—and further compare the z-score method and the tolerance. Slope Stability. Soil nails are one of several reinforcement options available in GeoStudio. cos θ This is at a maximum on a horizontal surface and at a minimum on a vertical wall. A slope which becomes progressively steeper downhill. 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; Carling, 1986; Dykes and Kirk, 2001; Warburton et al. CLARA-W, a Windows version of the three-dimensional slope stability program. txt) or read online for free. - Give some good references for selecting appropriate factor of safety for your analysis (depends on short term, long term analysis or static vs dynamic analysis). Location: San Diego, CA Date: 03/20/2018 - 03/22/2018 Description: Please note - Stability Analysis of Embankment Dams has filled. In this test, a cylindrical soil specimen is covered with a waterproof membrane (e. The rocky slope instability has brought great danger to human activity, and often causes economic losses, property damage and casualties, also can cause huge overhead expenses. A CASE STUDY IN YEN BAI. Steep slopes and embankments that have no vegetation or cover are especially vulnerable to erosion issues. Slope stability Major slope-instability related catastrophes of the 20th century Kansu (China) 1920 Loess flow 200,000 killed Gros Ventre (Wyoming) 1925 Rockslide ~40 killed Madison (Montana) 1959 Rockslide >100 killed Vaiont (Italy) 1963 Rockslide 2,600 killed Aberfan (Wales) 1966 Debris-slide 144 killed Huascaran (Peru) 1970 Complex 25,000 killed. free Etabs Excel Sheet foundation free cad Free dwg geotechnical highway hydraulic Landslide lidar Manhole pavement pile pmp PMP Exam powerpoint presentation Presentation project management railway revit Road Robot Structural Analysis Spreadsheet spreadsheets STEEL swimming pool tank Tekla. 8)-Stability analysis of slopes. Slope stability is controlled by • relief • material strength • soil water content • vegetation. The index i represents a free index. Objectives. Gaddy and Schlegel dated June 13,2000 enclosed is the slope stability and erosion analysis for the Sunrise Mountain Landfill. LimitState:GEO makes this easy for the user by providing the option to undertake a Factor Strength(s) analysis (see Section 8. Strength of soil and rock. • Soil has shear strength, conventionally defined as friction and cohesion. As the daily maximum rainfall in the research area is relatively high, and slope drainage is slow, simulation of slope stability was analyzed based on an undrained slope to ensure slope safety. However, the exit of the tunnel has been extended. ) n is the sheet flow roughness coefficient for the slope surface, and s is the slope (as a fraction) The basic shear stress equation can be used to calculate the maximum shear stress expected on a slope: τo =γyS Slope Stability Example • Design storm peak flow rate (Q) = 2. , which is shown in Figure 15. Lectures by Walter Lewin. This chapter provides further discussion and explanation related to stability of slope. The variation of earth surface or a part of it becomes focus of a geomorphic study of landforms. Most Critical Circular Shear Surface from Long-Term Stability Computations with Zero Pore Water Pres­. Keywords: SMR, CSMR, RMR, Slope Stability, Rudraprayag. Cutaneous sensory feedback from the paw pads plays an important role in regulating body balance, especially in challenging environments like ladder or slope walking. The program models rainfall infiltration,. application in models to assess slope stability. slope techniques such unloading, drainage, reinforcement, and mechanical stabilization. Factors that Influence Slope Stability. Earth Retaining Walls and Reinforced Slopes. Use features like bookmarks, note taking and highlighting while reading Slope Stability and Stabilization Methods. 8)-Stability analysis of slopes gTopic 2 (Section 6. That is to say that the strength parameters are not simultaneously reduced. GeoStudio has many options for dealing with structural reinforcements. Slide2 is a powerful, user-friendly, 2D slope stability analysis program using limit equilibrium method. Two prominent landslides, the Goleta and Gaviota slides, occupy the northern flank, with a scarp‐like crack extending east from the headwall of the Gaviota slide towards the Goleta complex. Although the causes of landslides are wide ranging, they have 2 aspects in common; they are driven by forces of gravity and result from failure of soil and rock materials that constitute the hill slope:. For simplicity in presentation, the slope is assumed to ascend as a whole along the positive x‐axis. Nonlinear Shear Strength Envelope Used for Example Problem B - Short-Term Stability Computation Series No. Slope stability is the process of calculating and assessing how much stress a particular slope can manage before failing. I plan to use these cards in a couple of different ways so I am. My lecture on Slope Stability for my Soil Mechanics course. Stability of Slopes. In the present study, limit equilibrium methods and finite element method have been used to calculate the factor of safety of earth dam. 1 Pore Pressures, Landslides and Slope Stability. Ahead of any slope stabilization work,. The index i represents a free index. embankments, road cuts, open-pit mining, excavations, landfills etc. 1 SLOPE STABILITY • Summarize data and analysis used to evaluate slope stability. This recording will be made available online to registered symposium delegates on 12 May 2020. com SLOPE/W Example File: Probabilistic and Sensitivity. The new Rock Manual,. Geometry of the slope. x, SINMAP computes and maps a slope-stability index by calculating factors of safety using a modified form of the infinite slope equation. Another laboratory test used for slope stability investigations is the multi-stage triaxial test, which also provides an estimate of the soil shear strength. Paul Guyer, P. Publisher: Faculty of Geo-Information Science and Earth Observation, Department of Earth Systems Analysis, UT-I-ITC-4DEarth. Type of soil and stratification. Slope stability is decreased by: A) increased slope angle: B) increased load on the slope: C) saturated soil conditions: D) all of the above: 2: Sandy soil has greatest strength when it is: A) dry: B) moist: C) saturated: D) quick: 3: What process is mainly a result of soil expansion and contraction? A) soil creep: B) landslide: C) mudflow: D) soil flowage: 4. A sturzstrom is in this respect comparable to pyroclastic flows, where a enormous column of warm very hot volcanic tephra mixed with gases and water vapour collapses and flows down along the slopes of the volcano. Firstly, a network of reference beacons is required on stable ground that can be observed from the transfer (i. Lecture 12: Slope Stability. SLOPE STABILITY: Design and construction of earth dams. This section focuses on techniques of soil slope stability analysis and stabilization and provides selected case studies to illustrate some of the approaches commonly adopted. Time during which the excavation is required to be open. Vegetation influences slope stability by: Providing a cover that cushions the impact of rain falling on slopes and retards erosion on surface Vegetation has root systems that tend to provide an apparent cohesion which increases resistance to landsliding Vegetation adds weight to the slope increasing the driving forces Role of Water Water can. Slope performs two-dimensional Slope Stability analysis to study circular or non-circular slip surfaces. Part IV-7 Bearing Capacity. ppt [Compatibility Mode]. Red areas have very high potential, yellow areas have high potential, and green areas have moderate. Stability of upstream slope during sudden drawdown : For the upstream slope of an earth dam the most critical condition occurs when the reservoir is suddenly emptied without allowing appreciable drainage from the saturated soil mass. 5 in static analysis and of 1. In a more rigorous analysis, the structural component properties can be included in a stress-deformation analysis so the forces and moments in the structure can be computed along with the interaction between the structure and ground. slope stability measures, for Rock slope stability measures by using wire mesh and rock anchors for excavation in rock, Soil nailing recommendation and design for vertical excavations at site, review diaphragm wall design for complex basement construction and provide excavation schemes • working with other design team members and. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on the stability of rock slopes in open pit mines, this book expands on the. Retaining walls are structures that are constructed and designed to resist the lateral pressure of the soil. Research Projects. stability, and classical soil mechanics principles for slope stability analysis apply. This type of dam is made up of only one type of material. 3 N/A No Peat 0 N/A N/A N/A N/A 1. Introduction 2. Cutaneous sensory feedback from the paw pads plays an important role in regulating body balance, especially in challenging environments like ladder or slope walking. The program models rainfall infiltration,. the following conclusions can be made: (a) the angle of repose of the granular systems was influenced by the degree of roughness of the base on which the grains came to rest. We don't intend to display any copyright protected images. Civilax is the Knowledge Base covering all disciplines in Civil Engineering. In certain areas of the world a large proportion of surface mine slope instabilities involve groundwater pressures, indeed in many situations stability is acutely sensitive to groundwater pressures. Size of dam 4. Later, the method was named the “enhanced limit” slope stability method by Nalyor. Location: San Diego, CA Date: 03/20/2018 - 03/22/2018 Description: Please note - Stability Analysis of Embankment Dams has filled. The Vajont slide occurred because of combined effects of a rising reservoir and heavy rainfall – water within the soil reducing shear strength – reactivating a historic failure surface. Engineering Geology, ESA, International Institute for Geoinformation Sciences and Earth Observation (ITC) The Netherlands. 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 load or loss of strength is identified to cause problems. Forepaws and hindpaws were anesthetized unilaterally using lidocaine injections. Expected Outcomes. Soil Slope Stability Analysis Using the Friction Circle Method Programmed in EXCEL. Equations for Slope The slope is defined as the "change in y" over the "change in x" of a line. Rainfall was calculated as having infiltrated into the interior of the slope. Sometimes FLAC is even used for slope stability engineering in com-bination with other methods. The factor of safety equations are written in the same form, recognizing whether moment and (or) force equilibri. - Click HERE to download in PDF - Click HERE to download in PowerPoint Format (PPT). Comparison of slope stability methods of analysis1 Received October 12, 1976 Accepted April 4, 1977 The papercompares six methods ofslicescommonly ~~sed for slopestability analysis. This example concerns the stability of a reservoir dam under conditions of drawdown. For large multipurpose dams zoned type method is used. 0 tan tan FS. LimitState: Geo 2. Slope Stability Analysis Spreadsheet Download Link. In-Situ Soil Testing LC Slope Stability Evaluation of a Wet MSW Landfill Utilizing Cone Penetrometer Testing Pieter Scheer, P. The Slope Catalogue number is of the form 11 SW-A/xxYYYY where 11 SW-A represents the the map 11 (there are 16 in all), SW is the SW section of map 11, and A is a subdivision of SW into four sections. 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. the slope stability for the earth dam such as change the water level in the reservoir or rapid drawdown of the water level. Dynamic Models and ResponsesDynamic model of an RLC network, State variable model, Impulse response model, Transfer function model, Standard test/disturbance signals and their models, Transfer function model and dynamic response of a second order electrical system. F3 reflects the relationship between the slope face and the joint dip. Slope stability analysis is performed to assess the safe design of a human-made or natural slopes (e. Vegetation influences slope stability by: Providing a cover that cushions the impact of rain falling on slopes and retards erosion on surface Vegetation has root systems that tend to provide an apparent cohesion which increases resistance to landsliding Vegetation adds weight to the slope increasing the driving forces Role of Water Water can. 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. This example concerns the stability of a reservoir dam under conditions of drawdown. And, it was scheduled to be cut. This course provides broad coverage of stability analysis for embankment dams. A wall for holding in place a mass of earth or the like, as at the edge of a terrace or excavation. Design of Micropiles for Slope Stabilization J. The results of the hand-made calculations are compared with the results from the GEO5 – Slope Stability program. Comparison of slope stability methods of analysis1 Received October 12, 1976 Accepted April 4, 1977 The papercompares six methods ofslicescommonly ~~sed for slopestability analysis. 4 Rock Thin Peat 3 3 2 18 Low 1. xls), PDF File (. GEOTECHNICAL ENGINEERING -2 By C. For calculation. In addition it can also perform a couple of other tests such as a simple GPU graphics test and also one for the hard drive. Stress transformation, Mohr’s circle. In addition 3 temporary ramps on the west wall will be used for the top 36m of the pit to reduce haulage distances. Introduction A review has been carried out of the commercial software available. com - id: 11cc9b-NWQ3O. Generalized bench geometry of Sasti open cast mine of coal (not to scale). For thermal stability test of free enzyme and enzyme-MOF composites, HRP (50 μg ml −1 ) and HRP-MOF composite (2 mg ml −1 ) water solutions were incubated at 60° and 70°C, respectively, for different time periods. 0 tan tan FS. Hazard mapping (seismic and infrastructure related: gas lines and facilities). If you would like to have the course of your choice offered in a new location, submit this form, include your contact information. methods of analysis 4. STABILITY OF NATURAL SLOPES. Upstream and d/s Slopes during and Immediately after Construction. 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. com/157q5z. (shear strength of the material, ability of particles in the rock to stay together). University of Sheffield. 6 mm) • Future slope = 0. (CEC) where he has worked for over 30 years. 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. Slope form is the shape of the slope in cross section. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability. Toronto, Canada. Protect geomembranes on dams, landfills, and containment basins with the industry's only complete geocell solution featuring the tendon and. Slope stability factors. Linked unit operations require each to be stable, and each contains a different set of variables that have to be contended with. 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. Mild Slope Note that for the M1 and M2 curves, the depth approaches normal depth in the direction of flow computation for subcritical flow. ’s profile on LinkedIn, the world's largest professional community. free Etabs Excel Sheet foundation free cad Free dwg geotechnical highway hydraulic Landslide lidar Manhole pavement pile pmp PMP Exam powerpoint presentation Presentation project management railway revit Road Robot Structural Analysis Spreadsheet spreadsheets STEEL swimming pool tank Tekla. effects of soil parameters and groundwater on stability 8. Engineering Geology, ESA, International Institute for Geoinformation Sciences and Earth Observation (ITC) The Netherlands. Apart from soil, the lateral pressure is caused by the pressure of liquid, earth filling, sand, or other granular material filled behind the wall after it’s constructed. SLOPE/W is the leading software product for analyzing the stability of earth and rock slopes. 35 and any applied variable action by 1. Even then these sections are also referred to as hill roads. The factor of safety equations are written in the same form, recognizing whether moment and (or) force equilibri. Plaxis 2d Ppt. The 150 m wide fault zone hosts many faults spaced 5. Although a basic knowledge of rock slope stability. ppt [Read-Only]. 2 Originally, sixteen different products (Appendix A), including erosion mats, mulches and. This paper investigates the effects of drawdown rate, saturated hydraulic conductivity and unsaturated shear strength of dam materials on the stability of the upstream slope of an earth dam. The limit equilibrium method is the most common approach for analyzing slope stability in both two and three dimensions. Stability of slope can be effectively improved by the provision of an appropriately design drainage system, this cab be achieved by: 1. paul guyer, p. SLOPE STABILITY Failure scarp in glacial till 'Scarp' 'Toe' 'Scarp' DIVISION OF - A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow. Various methods of slices have been developed and have the characteristics of being able to solve problems with complex geometries and variable soil and water conditions (Terzaghi and Peck 1976). com Received 10 - January - 2018 Accepted 28 - January - 2018 Article ID CoreConferences002 eAID CoreConferences. GeoStudio has many options for dealing with structural reinforcements. The stability of submerged breakwaters appeared only to be a function of the relative crest height, the damage level and the spectral. In general you have: Driving Force – Weight of Slope Resisting Force – Strength of soil along slip surface Buttress at toe. txt) or read online for free. Michael Duncan at Virginia Tech from 2006 to 2007 for. Stability of slopes in open excavation in different soil condition along with the factors that control slope stability in open excavation are discussed. This example concerns the stability of a reservoir dam under conditions of drawdown. Material will stay on slope if reasonably densified. Check and analyze the stability of slopes using various method of analysis and propose the best solution to the problem given. Circular arc failures mostly occurred when the spoil slope were too steep for the height. 000+ postings in Tuas, Singapore Country and other big cities in Singapore. The slope is creeping at a slow rate (generally a few mm a year) and no structures are in danger. This presentation demonstrated the role and use of numerical analysis by discontinuum and continuum modelling for the understanding of rock slope behavior. positive sideslip and consequently a positive sideslip angle. Slope performs two-dimensional Slope Stability analysis to study circular or non-circular slip surfaces. Type of soil and stratification. The slope stability analysis in geotechnical engineering is complicated its mechanism and the geological history of the slope. Objectives. The interactions between factors that affect slope instability are complex and multi-factorial, so often it is difficult to describe. They will make you ♥ Physics. The typical retaining structure on forest roads is a gravity retaining wall which resists earth pressure by the force of its own weight. Slope/w from Geoslope is another option with very similar capabilities that is mostly used in Europe. Slope Stability at Present. These include cadmium, antimony, chromium, mercury, lead, and arsenic – these last three being the most common in cases of heavy metal toxi. SLOPE STABILITY Lesson 06 - Topic 1 Stability analysis of slopes. TENDER FOR HILL SLOPE STABILITY STUDY CORRIGENDUM Page 3 of 3 MINISTRY OF DEFENCE DIRECTOR GENERAL PROJECT SEABIRD HILL SLOPE STABILITY STUDY NOTICE INVITING TENDER Reference: DAVP 10702/11/0899/1516 1. Point 1 (S1 Curve): y > yc > yn Sf < So dE/dx > 0 depth increases downstream 2. bibliography 9. Evaluation of minimum factor of safety in slope stability analysis Zu-YU CHEN AND CHANG-MING SHAO Institute of Water Consetvanc~~ and Hydroelectric Power Research, P. (CEC) where he has worked for over 30 years. These formulae were also described in the first Rock Manual, 1992. Two aspects of erosion need to be considered from slope stability point of view. Microsoft PowerPoint - CE 4780 - Slope Stability Analysis Author: dfratta Created Date: 3/7/2004 12:38:08 PM. 23 ANALYSIS OF INFINITE SLOPE WITH COMPLETELY SUBMERGED SLOPE If the slope is completely submerged, and if there is no seepage as in Fig. Time during which the excavation is required to be open. Rice’s teaching record at Utah State University includes “Seepage, Slope Stability, and Design of Dams and Levees,†“Ground Improvement,†"Advanced Shear Strength of Soils," and “Foundation Analysis and Design. embankments, road cuts, open-pit mining, excavations, landfills etc. (shear strength of the material, ability of particles in the rock to stay together). 04, August 2011, pp. We study the. The long slope of the face of a mountain is an example of this type, whereas finite slopes are limited in extent. KEYWORDS : Static analysis, Dynamic analysis, Time history method, Kaswati dam, Bishop's method, Factor of safety. The slope of the magnitude changes by +20dB/dec at every zero frequency and by -20 dB/dec at every pole frequency. In a more rigorous analysis, the structural component properties can be included in a stress-deformation analysis so the forces and moments in the structure can be computed along with the interaction between the structure and ground. CE 437/437L - Slope Stability and Earth Dams/Laboratory (3/1) Advanced analysis of soil strength. This program is used to perform slope stability analysis (embankments, earth cuts, anchored retaining structures, MSE walls, etc. In the example, a sheet pile wall is used to retain the surcharge fill placed to accelerate consolidation of underlying layers. CLARA-W, a Windows version of the three-dimensional slope stability program. Erik Loehr, Ph. com eMail mailcoreconferences. Rainfall was calculated as having infiltrated into the interior of the slope. txt) or read online for free. Slope Stability Calculation Spreadsheet. Full-time, temporary, and part-time jobs. This paper concentrates on the fact that natural materials are variable, and that representation of this variability appears crucial to getting a realistic understanding of certain geotechnical problems. 33% Upstream Downstream Middle Alternative Headwater Channel and Outfall Crediting Protocol Maryland Department of Transportation State Highway Administration 16 Summary. To analyse such a situation using the finite element method, a transient groundwater flow calculation is required. When the reservoir on the u/s side of the earth dam is. FHWA NHI-06-088 6 - Slope Stability Soils and Foundations - Volume I 6 - 3 December 2006 6. A series of seven example slope stability problems for the computer program, UTEXAS, is presented. Microsoft PowerPoint - 10 Slope Stability. Slope Stability. Slope Indicator Monitoring Originally read with inclinometer probe containing two servo-accelerometers that measure the inclination of the probe travelling in the machined grooves. As the daily maximum rainfall in the research area is relatively high, and slope drainage is slow, simulation of slope stability was analyzed based on an undrained slope to ensure slope safety. Distance from Crest: Non-circular path search - 1000 surfaces - optimized 1 1. Slope Stability. 2 ft3/sec • Slope width (W. Paul Guyer, P. Table 1 presents the main features of both projects, including also the volume of water retained. Geometry of the slope. To an audience of about 50 Mr. In certain areas of the world a large proportion of surface mine slope instabilities involve groundwater pressures, indeed in many situations stability is acutely sensitive to groundwater pressures. Determination of Pore Pressure at the Bottom of each Slice 3. 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. Geosynthetic Products. SLOPE STABILITY Lesson 06 - Topic 1 Stability analysis of slopes. The index i represents a free index. A phased rehabilitation programme will be implemented on the inactive dump. SLOPE STABILITY ANALYSIS. 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). Erosion Control. Participants perform computer slope stability analysis using the SLOPE/W computer program. A major revision of the comprehensive text/reference. Expected Outcomes. Gilbert, and S. txt) or read online for free. Classification -- the higher the class the higher the standard of duty and standard of care required And Watershed characteristics. Slope performs two-dimensional Slope Stability analysis to study circular or non-circular slip surfaces. Rock-Pack calc. The factor of safety equations are written in the same form, recognizing whether moment and (or) force equilibrium is explicitly satisfied. It also highlights some of the differences in approach to that adopted by the limit equilibrium method of slices. com SLOPE/W Example File: Probabilistic and Sensitivity. Stability number for uniform slopes ~limit analysis! Fig. To analyse such a situation using the finite element method, a transient groundwater flow calculation is required. Excavation or removal of the upper portion of the slope is another way to provide stability. A CASE STUDY IN YEN BAI. Part V-3 Stability Evaluation: Cohesive Soils. 03 - Soil Dynamics and Special Design Aspects. Blasting generates huge intensity of dynamic loading in the surrounding rock mass. Mass wasting processes range from violent landslides to imperceptibly slow creep. ) n is the sheet flow roughness coefficient for the slope surface, and s is the slope (as a fraction) The basic shear stress equation can be used to calculate the maximum shear stress expected on a slope: τo =γyS Slope Stability Example • Design storm peak flow rate (Q) = 2. Point 1 (S1 Curve): y > yc > yn Sf < So dE/dx > 0 depth increases downstream 2. SLOPE STABILITY AND EROSION CONTROL Slope stability can be generally described as the inherent structural integrity of a slope to resist failure. These include cadmium, antimony, chromium, mercury, lead, and arsenic – these last three being the most common in cases of heavy metal toxi. The retaining wall is checked for stability: overturning, sliding and bearing capacity failures. 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 ςf Angle of slope face, measured from horizontal 50 ςp Angle of failure surface, measured from horizontal 35 z Depth of tension crack Calculated (m) zw Depth of water in tension crack or on failure surface Variable (m). PLEASE SIGN IN AND TAKE A COMMENT SHEET 1. As a business focused on the delivery of quality products and services let us assist you in realising the maximum value from your slope stability or deformation monitoring project. Introduction A review has been carried out of the commercial software available. The Vajont slide occurred because of combined effects of a rising reservoir and heavy rainfall - water within the soil reducing shear strength - reactivating a historic failure surface. During the transition between the actual geometry and the CUR113 safe design, a steep slope will be excavated. 5×10-7cm/s at over 90%. The work concludes with some recommendations for similar investigation and site characterization. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. 0 tan tan FS m:1 m:1 0 5 1. Strength of soil and rock. Slope stability assessment is a fundamental step in evaluating landslide hazard and for the safe design of structures and infrastructures. Beware of potential for reversal of skin friction against the back side of the retaining wall! You should also be aware of the slope stability. Slope Stability Text section 14. •Safety Factor: = Resisting/Driving Forces. Ground response analysis Name: Institution: Date: Ground response analysis Analysis of local site response is a fundamental aspect of geotechnical earthquake engineering. •Slope fully saturated Subjective slope stability mapping (J. Research Projects. This paper investigates the effects of drawdown rate, saturated hydraulic conductivity and unsaturated shear strength of dam materials on the stability of the upstream slope of an earth dam. The slope stability analysis is crucial in engineering practice to ensure the stability of structures and prevent loss of human life and money. com eMail mailcoreconferences. Theory of Slope Stability. Gaddy and Schlegel dated June 13,2000 enclosed is the slope stability and erosion analysis for the Sunrise Mountain Landfill. Size of dam 4. 3% • Sand bed (D50 = 1. 131-234) Considerations Radius Design Speed Side Friction Factor Superelevation y Runoff y Runout Equation on pg. Types of Landfill Slope Stability Failures Rotational (Circular) Failures Translational (Block) Failures (most common for landfills) Potential Failure Modes of Landfills Slope Failure Triggers ¾Excessive Leachate head build up due to rainfall or liquid injection ¾Wetting of CCL/GM interface ¾Wetting and shear failure of. Chapter description. 75 3 1500 1700 1900 2100 2300 2500. SINMAP quantifies terrain stability in terms of the probability that the infinite slope stability model factor of safety is greater than one over uniform probability distributions quantifying the uncertainty in model parameters. Eugene Washington , P. ©Encyclopedia of Life Support Systems (EOLSS) GEOLOGY AND CONSTRUCTION Bell F. Secondly, a number of transfer stations are established on stable ground at locations from which the slope surface is visible. Repository Home. Ground Stability Videos Browse our collection of Ground Stability videos. Case studies of how root-system architecture influences subsurface flow Examples in which the interactions among root architecture, preferential flow, and landslides have been examined are few. The work concludes with some recommendations for similar investigation and site characterization. Slope Stability. Material will stay on slope if reasonably densified. At small scale, the influence of the spatial distribution of different land use types on slope stability has been evaluated using different techniques: Yi et al. It is also applied in evaluating stability of soft rock slope perforated by underground openings (Steward et al. This broad definition encompasses many and varied applications. Each of these events represents some type of slope failure. Although a basic knowledge of rock slope stability. Beware of potential for reversal of skin friction against the back side of the retaining wall! You should also be aware of the slope stability. Stability analysis of a dynamic system is divided in three categories: 1. Guidelines recommended for the analysis of slope stability are given in Table 6-1. Lecture notes, lectures 10-12 - Stability of slopes. These controlling factors are interactive, and the importance or effectiveness of each in controlling the type and degree of insta- bility is dependent on local geologic, vegetative, and hydrologic conditions. Participants will develop the skills necessary to design and evaluate soil slopes and embankments and learn about the implications for construction and inspections. 002 The Influence of Pore Air Pressure on Slope Stability Under Various Rainfall. Paul Guyer is a registered mechanical engineer, civil engineer, fire protection engineer and architect with over 35 years experience in the design of buildings and related infrastructure. Objectives of the work: 1. And, it was scheduled to be cut. 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. A hill road may be defined as the one which passes through a terrain with a cross slope of 25% or more. If you would like to have the course of your choice offered in a new location, submit this form, include your contact information. Free online courses of Civil Engineering including but not limited to Soil Mechanics, Design of Concrete Structures, Design of Steel Structures, Design and Analysis of Foundations, and. embankments, road cuts, open-pit mining, excavations, landfills etc. (shear strength of the material, ability of particles in the rock to stay together). Vegetation can also help to reduce pore water pressure within the slope by extracting water from roots Requirement Plants small enough to be planted in closely -packed lines. positive sideslip and consequently a positive sideslip angle. Slope stability analysis SLOPE/W is the leading slope stability software for soil and rock slopes. DS-13(4)-6: 1. It is also applied in evaluating stability of soft rock slope perforated by underground openings (Steward et al. The material properties used in the analyses are listed below in Table 2. Before recording your presentation, you’ll need to define the location on your computer where Zoom should save your recording. Permeability and Flow Net. This paper investigates the effects of drawdown rate, saturated hydraulic conductivity and unsaturated shear strength of dam materials on the stability of the upstream slope of an earth dam. Safety factor (SF) calculation for a slope a) Without tension crack b) With a water-filled tension crack. 1 ppb/g vibration, for outdoor pole mounted equipment Resistant to microphonic and/or board bending effects. EROSION CONTROL & SLOPE STABILITY SOLUTIONS PRESENTATION OVERVIEW: • The ARMORMAX ® system consists of a High Performance Turf Reinforcement Mat (HPTRM) coupled with an anchor that provides permanent tie-down for either severe erosion and/or structural slope stability. 0 Slope Stabilization Techniques Definition: A system of permanent design measures used alone or in combination to minimize erosion from disturbed surfaces. The instability will be triggered by dredging sand at the toe of this steep slope. The slope stability calculated for Bishop, Janbu, Spencer and GLE is summarized in the graph below: Factor of Safety vs. Angle of fill slope, degrees. The design requirements for abutments are similar to those for retaining wallsand for piers;. Strength of soil and rock. Table 1 presents the main features of both projects, including also the volume of water retained. Beware of potential for reversal of skin friction against the back side of the retaining wall! You should also be aware of the slope stability. Climate Long-term climate changes can have a signifi-cant impact on slope stability. Mass wasting decreases the steepness of slopes, leaving them more stable. They are 1. Stability number for uniform slopes ~limit analysis! Fig. 2 ft3/sec • Slope width (W. Hence, the LE stress method is established to analyze the slope stability by employing the double strengthreduction (DSR) technique in this work. Probabilistic Slope Stability Analysis of an Earth‐ filled Embankment Dam –Case Study Geo3T2, Cary, North Carolina April 12, 2017 Motivation Background – Summary of Analysis Techniques Case Study – Methodology Case Study –Analysis Results Outline. Introduction. - Click HERE to download in PDF - Click HERE to download in PowerPoint Format (PPT). Type of soil and stratification. 2 Originally, sixteen different products (Appendix A), including erosion mats, mulches and. Most Leaders Don't Even Know the Game They're In | Simon Sinek at Live2Lead 2016 - Duration: 35:09. We analyze the physical principles that underlie both the most frequently used computational methods and some less common but accurate methods. Slope form is the shape of the slope in cross section. Gosmeyer et al. And Topography slope analysis is frequently required to determine which areas of land are buildable. Chapter 4 - Static Stability Analysis is an existing chapter within Design Standards No. The factor of safety equations are written in the same form, recognizing whether moment and (or) force equilibrium is explicitly satisfied. ROCK A N = W cos A = the normal component of W contributes to the shear strength along the slip plane contributes to the resisting force. The slope stability can be analyse nowadays by using a computer program. paul guyer, p. Licence Price: 650 € ( $750 ). In this criterion, we require the characteristic equation to find the stability of the closed loop control systems. These factors are discussed below: 1. Erosion is due to. Distance from Crest: Non-circular path search - 1000 surfaces - optimized 1 1. Theory of Slope Stability. useful method of presenting results of slope stability analyses. The slope was constructed in the early '60s and is vegetated with local weeds and grasses. This term has been replaced by Maximum Allowable Slope. The shear strength works to maintain the slope's stability and keep the materials in place. 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 load or loss of strength is identified to cause problems. Slope stability analyses play an important role in many civil engineering projects. The first distinction to make is whether the materials forming the slope under consideration behave primarily as soil or rock. txt) or read online for free. Safety factor (SF) calculation for a slope a) Without tension crack b) With a water-filled tension crack. They are certainly major factors in cut slope stability and in. The factor of safety equations are written in the same form, recognizing whether moment and (or) force equilibri. meaning of this phrase. When the reservoir on the u/s side of the earth dam is. Meanwhile, the friction between an object on the slope and the slope itself is a function of the component of gravity which acts normally to the slope, F nn. Slope stability guidelines for design Type of Source of Strength Parameters Remarks Analysis (see Chapter 5) (see Note 1) Use Bishop Method. Slope stability is affected by the following factors. For the Love of Physics - Walter Lewin - May 16, 2011 - Duration: 1:01:26. Slope stability of soils is one of the major problems since the ancient times. How does the slope angle play a role in slope stability? 4. We hope you can find what you need here. 1999, Dawson & Roth 1999, Cala & Flisiak 2000). Engineering Geology, ESA, International Institute for Geoinformation Sciences and Earth Observation (ITC) The Netherlands. The gradient is steepened to 1 in 9 for the bottom 90 m of the pit. Stability Testing and CLSI EP25-A A new CLSI guideline has come out with recommendations on the best way to calculate and interpret the stability of IVD reagents.