Features in FLAC/Slope

Main Features

Tools within the graphical interface allow for rapid model development at each stage of the process, including:

  • Creation of the slope geometry
  • Addition of layers
  • Specification of materials either manually or from a database
  • Location of a water table
  • Positioning a planar or non-planar material interface
  • Application of surface loading at any location
  • Installation of structural support such as soil nails or rock bolts


FLAC/Slope offers these advantages over Limit Equilibrium methods:

  • Any failure mode develops naturally; there is no need to specify a range of trial surfaces in advance
  • No artificial parameters (e.g., functions for inter-slice angles) need to be given as input
  • Multiple failure surfaces (or complex internal yielding) evolve naturally, if the conditions give rise to them
  • Structural interaction (e.g., rock bolt, soil nail or geogrid) is modeled realistically as fully coupled deforming elements, not simply as equivalent forces
  • Solution consists of mechanisms that are feasible kinematically
FLAC/Slope Updates

Latest News
  • 2020 Peter A. Cundall Award ...
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  • Itasca Symposium 2020 Technical Papers and Statistics ...
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  • Itasca Symposium 2020 - Registration Now Open! Registration is now open for the Fifth International Itasca Symposium....
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Upcoming Events
17 Feb
Itasca Symposium 2020
The Fifth International Itasca Symposium will be held at the University of Vienna (Austria). The Symposium will features the applicatio... Read More
9 Mar
FLAC Introductory Training - Minneapolis
FLAC is numerical modeling software for advanced geotechnical analysis of soil, rock, groundwater, and ground support in two dimensions... Read More
16 Mar
FLAC3D Introductory Training - Minneapolis
Three days of general feature training addressing basic concepts and recommended procedures for geotechnical numerical analysis.... Read More