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Parameters to Compute Foundation Bearing Capacity

Rock mass poor rock mechanical excavation significant floor heave temporary invert or horizontal geometry of excavation sequence 0 5 Rock mass very poor rock often very altered local damage of surrounding rock (app 3 m ) 0 8 Rock slope or rock outcrop modification with controlled blasting 0 7Get price

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Geotechnical Design Manual

Engineers completing slope stability calculations should be familiar with the assumptions and limitations of the methods selected Further for more complex analyses the use of multiple methods for comparison is prudent The following table summarizes the methods typically included in slope stability software packages Get price

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Slope Stability

SLOPE STABILITY 1 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 Methods for analysis of slope stability are described and are illustrated by examples in the appendixes Get price

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Design Manual Rock Cut Slopes Chapter 200

Where the depth of rock excavation in any given area is 5 feet or less design practice is to provide a normal ditch section however this is typically reviewed on a case-by-case basis A flat bottom ditch with a minimum width of 10 feet is generally required for all rock cut slopes as shown in Design Detail 4101 Get price

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Rocscience Inc

Slope Stability From quick 2D analysis to complex 3D modeling we offer the most extensive suite of tools for the analysis of soil and rock slopes More Software Engineered for Excavation Model virtually any type of underground or surface excavation and analyze stress groundwater flow and design supports with ease Get price

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Engineering Geology of Rock Slopes in Highway

the engineering geology of rock slopes in relation to highways and roadways the investigation and assessment of cut-slope stability and provides some local case studies as illustrations The engineering geologic investigation and assessment of cut-slope stability are pre-requisite to any stabilization measures that might be necessary to ensureGet price

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bSLOPE A Limit Equilibrium Slope Stability Analysis Code

= Total normal force on the base of the slice over a length l (sliceNm and sliceNf for moment and force equilibrium respectively) ! ! != Shear force mobilized on the base of the slice It is a percentage of the shear strength as defined by the Mohr-Coulomb equation Get price

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Stability Calculation Method of Slope Reinforced by

3 Stability Calculation Model of Frame Supporting Structure with Prestressed Anchor Based on the failure mode of soil slope it takes the soil frame structure and anchor rod (rope) interaction into consideration and according to the literature for soil slopes and large-scale rock slope structure circular sliding method is appropriate Get price

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Rock mass disturbance effects on slope assessments using

slope stability evaluation Hence the aim of this research is to investigate the influence of the rock mass disturbance on rock slope stability assessments In particular the rock mass disturbance which can vary in a slope is taken into account It means the rock mass is inhomogeneous This paper focusesGet price

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Stability of Slopes for Excavations in Different Soil Types

Stability of slopes in open excavation in different soil condition along with the factors that control slope stability in open excavation are discussed 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 Get price

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Rock Slope Stability Assessment of Limestone Quarry An

The aim of this study is to investigate slope stability problems for heavily jointed karstic limestones in an aggregate quarry Limestone quarries have turned into steep cliffs of bare rocks which threaten the safety of construction and have also negative influence on the aesthetics in the Cebeci Region Get price

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PRELIMINARY GEOMECHANICAL ANALYSIS ON LIMESTONES IN

Based on field observations the slope angle in the area is dominated by steep slopes The rock hardness level is dominated by hard rock with a hardness ranging from 50-100 MPa Rock Mass Rating shows that the are a is dominated by good rocks While the S lope Mass Rating calculation show that the maximum slope angle is between 52-75 Get price

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Theory of Slope Stability

Theory of Slope Stability In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of Get price

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(PDF) Numerical modeling of Slope stability in Chouf Amar

In other words the stability calculation divided into four categories (e g planar wedge top- makes it possible both to assess the margin of safety of pling and circular failures) based on their geometrical the slope with respect to the rupture to define in the site nature and geotechnical conditions of the rock masses the zone most Get price

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Example Applications 10 Slope Stability Analysis of a

Slope Stability Analysis of a Rock Slope 10-1 10 Slope Stability Analysis of a Rock Slope 10 1 Problem Statement Limit equilibrium methods are commonly used to evaluate the stability of slopes in rock or soil For materials in which well-defined structural patterns (e g Get price

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GEOLOGY AND CULTURAL HERITAGE

A slope stability analysis was performed with the determination of important unstable wedge and plane failures and the calculation of their factors of safety using both field measurements and laboratory tests results (Christaras et al 1994) Field measurements were interpreted statis-Get price

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NORMAN I NoIuIsH ROCK STRENGTH PROPERTIES AMD

analysis of rock slope stability and the design of rock slope stabilization measures as discussed in Chapters 15 and 18 respectively Figure 14-5 illustrates typical strength parame-ters for five geological conditions that range from a low-strength infilled fracture to relatively high-strength fractured rock containing discontinuousGet price

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Rock Slope Stability Analysis Based on FLAC3D Numerical

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 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 Get price

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THE 3D STABILITY ANALYSIS OF ROCK MASS

The behavior of rock mass around the inlet and outlet portals is mostly similar to slope stability analysis Therefore the middle part of the tunnel is only studied for the interaction analysis 5 1 Stress-strength method The stress-strength method as one of rock-support interaction analysis methods also as a Get price

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Observed rock mass degradation and resulting slope instability

The classifications and laboratory test results show that degradation of the rock material and rock mass has progressively continued throughout this period and threatens the stability of the current slope by causing a notable decrease of the bedding plane's friction angle Get price

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rock slope stability calculation in limestones

Probability analysis method for the stabilityof grid and bedded rock slope one side of some hillside limestone quarry is high bedded rock slope so the stability Read more Sitemap pre concrete grinding vacuum dealers in india next lowest price for philips grinderGet price

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Estimating Rock Mass Strength

This is however a problem for certain applications e g slope stability analysis in which the shear strength of a failure 3 surface as a function of the normal stress is required Procedures to deal with this obstacle will be discussed in Chapter 3 of this report For intact rock s = 1 and m = mi Get price

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Kinematic Assessment of Rock Slope Stability at Obajana

The research work assessed the stability of rock slopes for optimum exploitation of limestone deposits at Obajana in Kogi State and Ewekoro in Ogun state Geological mapping was carried out to measure the orientations of discontinuities The orientation data obtained were plotted on stereonets to determine pole concentration and major joint sets using Dips 5 0 software from Rocscience Get price

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Stability of Slopes for Excavations in Different Soil Types

Stability of slopes in open excavation in different soil condition along with the factors that control slope stability in open excavation are discussed 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 Get price

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SLOPE STABILITY ASPECTS AND PROTECTIVE TECHNIQUES

Hard rock masses with joints shears or bedding representing major discontinuities and dipping downslope are excavated along the dip of the discontinuity although all material should be removed until the original slope is intercepted Get price

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Stability of rock slopes in Valles Marineris Mars

As a result neither height nor slope angle alone determines the slope stability and both must be considered when discussing or modeling slope strength Mechanical modeling of the frictional strength of dry rock masses scaled to the lower Martian gravity demonstrates that slope dimensions (height and angle) scale inversely with planetary surface gravity [ Caruso 2002 ] Get price

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321 1 Design of Earth Slopes

Rock slopes in limestones dolomites and sandstones are normally cut vertically or with a slight batter Benches shall be provided at a vertical spacing not to exceed 30 ft for cut slopes greater than 30 ft high Benches shall be a minimum of 10 ft wide Benches may be provided at the contacts of different formations (not necessarily at 30 ft ) and may vary in width Get price

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The assessment of slope stability and rock excavatability

The aim of this study is to evaluate the stability and excavatability of newly stripped rock slopes (slope 1 (SN–1) slope 2 (SN–2) and slope 3 (SN–3)) in a limestone quarry These are new pro duction sites with comparable geological formations along the southern part of the quarry where three planar failures were previously observed Get price

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The Effect of Scale and Criticality in Rock Slope Stability

Contact mechanics permits to calculate normal direction of the slope in the dolomitic limestones on the southern flank of the valley Initially the rate of creep was 1cm=week but gradually it accelerated to 1cm=day The Effect of Scale and Criticality in Rock Slope Stability 121 was carrying needs to be redistributed The multi Get price

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Study of Slope Stability (Open Pit Mining Algeria

Jul 12 2017Abstract The objective of our work is the study of the influence of the dynamic load due to the use of the explosive in the stability of the slope of an open pit mine for this purpose we used the method of limit equilibrium to calculate the value of the safety factor through the Get price

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Slope Stability Hazard Assessment and Mitigation

Slope Stability Hazard Assessment and Mitigation 167 presence of these filled sinkholes during excavation have an adverse effect on the slope stability During blasting the explosion gases will force their way out of the rock mass via the karstic discontinuities rather than by breaking intact rock or by following discontinuities to the nextGet price

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Plane failure in rock slopes

In rock slopes plane wedge toppling and rock fall are common modes of failures (Tang et al 2016 Lee and Wang 2011 Yoon et al 2002 Hoek and Bray 1981 Hocking 1976) Plane mode of failure generally occurs in slope formed by stratified sedimentary and meta-sedimentary rock formations Get price

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Slope Stability Hazard Assessment and Mitigation

Slope Stability Hazard Assessment and Mitigation 167 presence of these filled sinkholes during excavation have an adverse effect on the slope stability During blasting the explosion gases will force their way out of the rock mass via the karstic discontinuities rather than by breaking intact rock or by following discontinuities to the nextGet price

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