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| SLOPE/W - Slope Stability analysis. |
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SLOPE/W is the leading slope stability software product for computing the factor of safety of earth and rock slopes. With SLOPE/W, you can analyze both simple and complex problems for a variety of slip surface shapes, pore-water pressure conditions, soil properties, analysis methods and loading conditions.
Using limit equilibrium, SLOPE/W can model heterogeneous soil types, complex stratigraphic and slip surface geometry, and variable pore-water pressure conditions using a large selection of soil models. Slope stability analyses can be performed using deterministic or probabilistic input parameters. Stresses computed by a finite element stress analysis may be used in addition to the limit equilibrium computations, for the most complete slope stability analysis available.
With this comprehensive range of features, SLOPE/W can be used to analyze almost any slope stability problem you will encounter in your geotechnical, civil, and mining engineering projects. Easy to Use
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Defining a Stability Model
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The unique CAD-like technology in SLOPE/W allows you to create your geometry by drawing it on the screen. You can even import a DXF picture to assist you. Then choose an analysis method, specify soil properties and pore-water pressures, define reinforcement loads, and create your trial slip surfaces.
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Viewing the Analysis Results
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Once you have solved your stability problem, SLOPE/W offers many tools for viewing the results. Display the minimum slip surface and factor of safety, or view each one individually. View information about the critical slip surface, including the total sliding mass, a free body diagram and a force polygon showing the forces acting on each slice. Contour the factors of safety, or show plots of computed parameters. Then prepare the results for your report by adding text labels, axes and pictures to the drawing. Automatically generate a detailed report of all input data and results.
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Typical Applications
SLOPE/W can model almost any stability problem, including:
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Natural earth and rock slopes
Sloping excavations
Earth embankments
Open-pit high walls
Anchored retaining structures
Berms at the toe of a slope
Surcharges at the top of a slope
Earth reinforcement, including soil nails and geofabrics
Seismic and earthquake loading
Tension cracks
Partial and total submergence
Line load at any point
Unsaturated soil behavior
plus many more!
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| Formulation |
SLOPE/W is formulated in terms of moment and force equilibrium factor of safety equations. For example, the Morgenstern-Price method satisfies both force and moment equilibrium. This general formulation makes it easy to compute the factor of safety for a variety of methods and to readily understand the relationships and differences among all the methods.
SLOPE/W can use finite element computed stresses from SIGMA/W or QUAKE/W to calculate a stability factor by computing both total shear resistance and mobilized shear stress along the entire slip surface. SLOPE/W then computes a local stability factor for each slice.
Probabilistic analysis can be performed by using normal distribution functions to vary soil properties and loading conditions. Using a Monte Carlo approach, SLOPE/W computes the probability of failure in addition to the conventional factor of safety.
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| Features: |
- Limit equilibrium methods include Morgenstern-Price, GLE, Spencer, Bishop, Ordinary, Janbu and more.
- Soil strength models include Mohr-Coulomb, Spatial Mohr-Coulomb, Bilinear, Undrained (Phi=0), anisotropic strength, shear/normal function, and many types of strength functions.
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- Specify many types of interslice shear-normal force functions.
- Pore-water pressure options include Ru coefficients, piezometric lines, pressure contours, a grid of values, spatial functions, or finite-element computed heads or pressures.
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- Define potential slip surfaces by a grid of centers and radius lines, blocks of slip surface points, entry and exit ranges, fully specified shapes, or automatic.
- Use probabilistic soil properties, line loads and piezometric lines.
- And many more!
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Use pore-water pressures from SEEP/W, SIGMA/W, QUAKE/W or VADOSE/W
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Using finite-element computed pore-water pressures in SLOPE/W makes it possible to deal with highly irregular saturated/unsaturated conditions or transient pore-water pressure conditions in a stability analysis. For example, you can analyze changes in stability as the pore-water pressure changes with time.
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Use stresses from SIGMA/W, or QUAKE/W
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Using finite element computed stresses in SLOPE/W allows you to conduct a stability analysis in addition to a static deformation or dynamic earthquake analysis. For example, you can compute the minimum factor of safety that will be reached during an earthquake, or you can find the resulting permanent deformation, if any, using a Newmark-type procedure.
Engineering Methodology Book
When you purchase a SLOPE/W 2007 license you also receive a copy of the SLOPE/W Engineering Methodology book, Stability Modeling with SLOPE/W 2007. This book is not a software manual but a full-length book that discusses why and how to model. It does not describe how to use the commands in the software or which buttons to click - that is provided in detail in the Online Help. Instead it is about thinking: how to think before, during and after setting up and solving a model. The Engineering Methodology book has chapters devoted to: |
| Limit Equilibrium Fundamentals
Factor of Safety Methods
Slip Surface Shapes
Geometry
Material Strength
Pore-water
Reinforcement and Structural Components
Seismic and Dynamic Stability
Probabilistic and Sensitivity Analyses
Illustrative Examples
Theory |
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