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:

- 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

Other features of the finite-element software include:

- Four- to eight-noded quadrilateral elements
- Three- to six-noded triangular elements
- Infinite elements for far-field boundary conditions
- Selectable Gaussian integration order
- Color shading of elements according to material type
- Display of boundary conditions as graphic symbols
- Boundary conditions specified as functions for transient analyses
- No inherent restrictions on the number of nodes and elements
- No restriction on the nodal number difference (bandwidth) in an element

- Pore-water pressure distributions computed by SEEP/W can be used in SLOPE/W for a slope stability analysis.
- Pore-water pressures that arise due to external loadings can be computed by SIGMA/W as part of a stress analysis. The dissipation of the load-induced excess pore-water pressures can be analyzed by SEEP/W. SIGMA/W can then compute the deformation resulting from the excess pore-water dissipation.
- SLOPE/W can use the SIGMA/W-computed stress-induced excess pore-water pressures in a stability analysis. This makes it possible, for example, to compute the end-of-construction stability conditions in terms of effective stresses.
- SIGMA/W-computed finite-element stresses can be used in SLOPE/W to compute stability factors. This new and innovative method makes it possible to assess the overall stability of a slope as well as the local stability factor of each slice.

SIGMA/W analyzes geotechnical stress and deformation problems. The comprehensive formulation of SIGMA/W makes it possible to consider analyses ranging from simple linear-elastic deformation problems to sophisticated effective-stress nonlinear problems with staged applied loadings.

Many computed parameters such as vertical stress can be contoured.

- Linear-Elastic
- Anisotropic Linear-Elastic
- Non-linear-Elastic
- Elastic-Plastic (Tresca & Mohr-Coulomb Failure Criterion)
- Strain-Softening (Von Mises Failure Criterion)
- Cam-Clay (Critical State)
- Modified Cam-Clay (Critical State)

Fill placement or excavation can be modeled by specifying the time step at which to add or remove an element from the analysis.

You can use any combination of these soil models in a stress analysis to represent various types of soils or structural materials.

- Drained total and effective stress
- Undrained effective stress
- Total stress analysis with pore-water pressures based on total stress changes
- Two-dimensional plane strain
- Three-dimensional axisymmetric
- Volume change (deformation due to changes in pore-water pressure; uncoupled consolidation when integrated with SEEP/W)
- In-situ stress analysis

- X and Y displacements
- X and Y forces
- X and Y pressures
- X and Y spring constants
- Self-weight gravity loading

The computed parameters (such as stress, strain, pore-water pressure, and deformation) can be displayed as contours or graphs. These variables include: Vertical (Y) stress; Horizontal (X) stress; X-Y shear stress; Maximum (major principal) stress; Minimum (minor principal) stress; Maximum shear stress; Mean stress (p), Deviatoric stress (q); Strains; Pore-water pressure; and Material properties. Stress conditions can be contoured and graphed as total or effective stresses. You can contour and graph the computed variables as the total summation for all load steps or the incremental change between any two selected load steps.

Computed parameters can be plotted as a function of space, time, deformation or strain. The total stress, effective stress, or strain state at any node or element Gauss region can be displayed as a Mohr Circle with the associated diagrams.

- Deformation within or underneath an embankment or earth dam
- Lateral movement of braced or anchored excavations and surface settlement around the excavation
- Floor rebound of open-pit, sloping excavations
- Volume changes (uncoupled consolidation or heave) resulting from pore-water pressure changes

Deformations can be plotted as a deformed mesh at a specified magnification.

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