Last Updated October 17, 2019

Overview

SLOPE/W is the leading slope stability CAD software product for computing the factor of safety of earth and rock slopes. SLOPE/W can effectively analyze both simple and complex problems for a variety of slip surface shapes, pore-water pressure conditions, soil properties, analysis methods and loading conditions.

Key Features

PORE-WATER PRESSURE

Pore-water pressures can be defined using piezometric lines, spatial functions, or the results from other GeoStudio finite element analyses. Values can be displayed as contours on the geometry to reveal PWP values used in the analysis.

RAPID DRAWDOWN

Rapid drawdown analysis can be conducted using the pore-water pressures defined using piezometric lines, transient finite element GeoStudio analyses, or the multi-stage rapid drawdown technique.

MATERIAL MODELS

SLOPE/W supports a comprehensive list of material models including Mohr-Coulomb, undrained, high strength, impenetrable, bilinear, anisotropic strength, SHANSEP, spatial Mohr-Coulomb and more.

LIMIT STATE DESIGN

Limit state design or load resistance factor design is handled by specifying partial factors on permanent/variable loads, seismic coefficients, material properties, reinforcement inputs and more.

SLOPE/W models a full range of stability problems

NATURAL SOIL AND ROCK SLOPES

SLOPE/W’s full-featured capability allows for the stability analysis of natural soil and rock slopes under a variety of conditions including surcharge and seismic loading, pore-water pressure fluctuations in the saturated and unsaturated zone, and more. An extensive material model library and flexible search techniques provide the capacity to handle the most complicated failure mechanisms possible in the field of geotechnical engineering.

DAMS AND LEVEES

SLOPE/W is used worldwide for the design and analysis of hydraulic structures subjected to a variety of natural and anthropogenic forces including flood events, analysis facilitates risk-assessment while integration with SIGMA/W or QUAKE/W allows for sophisticated finite element stability and Newmark deformation analyses.

ROADS, BRIDGES AND EMBANKMENTS

SLOPE/W is commonly used to assess stability of roadways, rail beds, bridge abutments, and MSE walls both during and after construction. SLOPE/W can analyze stability at each construction stage, including the effects of pore-water pressure changes and interaction with reinforcement.

SLOPE STABILIZATION

SLOPE/W includes a broad range of stabilization options for civil, geotechnical, and mining applications, from simple earthen toe berms to complex subsurface drainage and soil-structure techniques. The reinforcement functionality, material model library, and diverse pore water pressure definition can be used together to design even the most sophisticated slope stabilization options.

CONSTRUCTION EXCAVATIONS AND MINE SLOPES

Modelling construction excavations and mine slopes is seamless with the use of SLOPE/W and the powerful workflow of GeoStudio. From vertical excavation cuts to benched mine slopes, the powerful geometry tools and unique GeoStudio analysis tree facilitate both reinforcement design and optimizing slope configurations.

Viewing the Analysis Results

Once you have solved your stability analysis, SLOPE/W offers many tools for viewing the results. Display the minimum slip surface and factor of safety, or view each one individually. View detailed information about any 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 labels, axes, and pictures, or export the results into other applications such as Microsoft® Excel® for further analysis.

Typical Applications

SLOPE/W can model almost any stability problem, including:

  • 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

The power of integration

SLOPE/W offers simple but powerful analytical capabilities when used in combination with other GeoStudio products.

SEEP/W results in SLOPE/W

Using SEEP/W finite element pore-water pressures allows SLOPE/W to consider complex saturated / unsaturated pore water pressures. Transient SEEP/W pore-water pressures can be used to investigate stability changes over time.

SIGMA/W STRESSES IN SLOPE/W

Many geotechnical problems require both deformation and stability analyses. For others, a limit equilibrium analysis alone is inadequate. For these cases, SIGMA/W stresses may be used in SLOPE/W to compute the safety factors.

QUAKE/W RESULTS IN SLOPE/W

Earthquakes may generate inertial forces and excess pore-water pressures affecting the stability of ground structures. SLOPE/W can use both dynamic stresses and pore-water pressures from QUAKE/W to assess stability and deformation following an earthquake.