ΠΡΟΓΡΑΜΜΑ ΑΝΑΛΥΣΗΣ ΠΡΑΝΩΝ!
Any of the trial slip surfaces and factors of safety can be displayed. A free body diagram and force polygon can be shown for any slice on the critical slip surface.
SLOPE/W uses the limit equilibrium theory to compute the factor of safety of earth and rock slopes for a variety of methods. The comprehensive formulation of SLOPE/W makes it possible to analyze both simple and complex geometric, stratigraphic, and external loading conditions.
FEATURES AND CAPABILITIES
SLOPE/W can use any of the following methods to calculate the factor of safety:
The user can select a variety of interslice side force functions for the Morgenstern-Price and GLE methods including sine, clipped sine, trapezoidal, and finite-element based functions.
- Ordinary or Fellenius
- Bishop's Simplified
- Janbu's Simplified
- Corps of Engineers
- GLE (General Limit Equilibrium)
- Finite-Element Stress
Geometry & Stratigraphy
- Multiple soil (material) types
- Partial submergence
- Variable thickness and discontinuous soil strata
- Impenetrable soil layers
- Dry and water-filled tension cracks
- Definition by rotation center and radius or by data points
- Circular shape
- Composite shape (circular and linear)
- Fully specified by a series of straight line segments
- Block specified (straight line segments through two grids of points)
- Optional crest and toe projections at active or passive earth pressure angles
- Vertical tension crack when slip surface inclination exceeds specified angle
- An ru coefficient for each soil type
- A piezometric line for each soil type
- Contours of pore-water pressure
- Head, pressure, or ru coefficients specified at discrete points
- Finite-element computed pore-water pressures
- Total and/or effective strength parameters, c and f
- Bilinear strength envelopes
- Unsaturated soil strength
- Undrained strength as a function of depth
- Anisotropic strength
- User-specified data point curved failure envelope
- Surface pressures
- Surcharge concentrated loads
- Anchor loads and soil nails
- Geo-fabric reinforcement
- Seismic and earthquake loads
Various parameters can be plotted along the critical slip surface.
SOLVING A STABILITY PROBLEM
SLOPE/W provides a CAD-like DEFINE function for graphically defining a slope stability problem. Once a problem has been defined, you can compute the factors of safety for each trial slip surface with the SOLVE function. During the processing, SOLVE displays the minimum factors of safety and the slip surface being analyzed. SOLVE also computes the detailed forces acting on each slice for the slip surface with the minimum factor of safety.
Large numbers of block-type slip surfaces can be analyzed by defining a left and a right grid of points with crest (active) and toe (passive) projection inclinations.
VIEWING AND PLOTTING
The CONTOUR function allows you to view each potential slip surface and its associated factor of safety by clicking on any rotation center in the grid. The potential sliding mass is displayed along with the slices used in the analysis. A free body diagram and force polygon can be viewed for any slice on the critical slip surface by clicking on the slice.
To help interpret the results, various parameters can be plotted along the critical slip surface, including:
- Frictional and cohesive strength
- Shear resistance
- Base normal
- Interslice normal and shear forces
- Seismic force per slice width
- Pore-water pressure
- Local stability factor when using the Finite-Element Stress Method
SLOPE/W can be used to model almost any stability problem including:
- Natural earth and rock slopes
- Sloping excavations
- Earth embankments
- Open-pit high walls
- Anchored retaining structures
Slip surfaces can have any specified shape. Anchor loads can vary depending on the slip surface position relative to the bonded length.
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. It is found at the intersection of the force and moment equilibrium curves. 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 also calculate a stability factor based on SIGMA/W finite-element computed stresses. Once a stress analysis has been completed, SLOPE/W can compute both the total shear resistance and mobilized shear stress along the entire slip surface in order to assess the margin of safety in terms of a stability factor. In addition, SLOPE/W computes a local stability factor for each slice. To use this optional feature, you must have SIGMA/W as well as SLOPE/W.
SLOPE/W Version 4 Enhancements
Version 4 of SLOPE/W provides a leap into the world of 32-bit computing and advanced Windows environments. Version 4 is 32-bit software that runs under Windows 95 and Windows NT allowing you to analyze your problems faster and easier.
The following are an integrated suite of five geotechnical software packages being used extensively throughout the world on six continents and in more than 70 countries. They are used by practicing engineers for the analysis and design of a wide variety of structures and by universities for teaching and research. The five state-of-the-art software packages for geotechnical modeling in the Microsoft Windows environment are:
- Probabilistic Slope Stability Analysis
- Increased Performance
- Improved User Interface -Toolbars, status bar, The File menu lists the previous six SLOPE/W problems that you have opened, new Windows 95 common dialog boxes are supported.
- Online Help and User's Guide
- Enhanced Soil Models - Most soil models have been enhanced to handle anisotropy. You can now define a function to make the soil strength dependent on the slice base inclination. In the Anisotropic Strength soil model, both c and can be assigned anisotropic strength modifier functions.
SLOPE/W now has an additional soil model that allows you to specify the strength as a function of the effective overburden stress.
- Color Selection for Soil Layers
- Dynamic Text Labels
- Import Picture Files
- Graphical Modification of Problem Geometry
- Many other minor improvements have been made to DEFINE, SOLVE, and CONTOUR.
- SLOPE/W for slope stability
- SEEP/W for groundwater seepage
- CTRAN/W for contaminant transport
- SIGMA/W for stress and deformation
- TEMP/W for geothermal analysis
Requirements: PC 486/Pentium with 16 MB RAM and Windows 3.x/95/NT
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Τελευταία Ενημέρωση 27 Ιουλίου 2004 - Last Revised on July 27, 2004
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