Phase2 - Finite Element Analysis for Excavations and Slopes

From Solutions for Rock and Soil Engineering
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Phase2 - Finite Element Analysis for Excavations and Slopes

Phase2 8.0 is a powerful 2D elasto-plastic finite element stress analysis program for underground or surface excavations in rock or soil. It can be used for a wide range of engineering projects and includes support design, finite element slope stability, groundwater seepage and probabilistic analysis.

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Complex, multi-stage models can be easily created and quickly analyzed - tunnels in weak or jointed rock, underground powerhouse caverns, open pit mines and slopes, embankments, MSE stabilized earth structures, and much more. Progressive failure, support interaction and a variety of other problems can be addressed.

Phase2 offers a wide range of support modeling options. Liner elements can be applied in the modeling of shotcrete, concrete, steel set systems, retaining walls, piles, multi-layer composite liners, geotextiles and more. Liner design tools include support capacity plots which allow you to determine the safety factor of reinforced liners. Bolt types include end anchored, fully bonded, cable bolts, split sets and grouted tiebacks.

One of the major features of Phase2 is finite element slope stability analysis using the shear strength reduction method. This option is fully automated and can be used with either Mohr-Coulomb or Hoek-Brown strength parameters. Slope models can be imported / exported between Slide and Phase2 allowing easy comparison of limit equilibrium and finite element results.

Phase2 includes steady state, finite element groundwater seepage analysis built right into the program. There is no need to use a separate groundwater program. Pore pressure is determined as well as flow and gradient, based on user defined hydraulic boundary conditions and material conductivity. Pore pressure results are automatically incorporated into the stress analysis.

Material models for rock and soil include Mohr-Coulomb, Generalized Hoek-Brown and Cam-Clay. Powerful new analysis features for modeling jointed rock allow you to automatically generate discrete joint or fracture networks according to a variety of statistical models. With new 64-bit and multi-core parallel processing options Phase2 8.0 can solve larger and more complex models in shorter times.

Modeling

Phase2 8.0 provides material models for rock and soil including Mohr- Coulomb, Generalized Hoek-Brown and Cam-Clay. Complex multi-stage excavations can be easily created and edited using state-of-the-art CAD tools. Groundwater pore pressure can be determined using steady state finite element seepage analysis – flows, pressures and gradients are calculated based on user defined hydraulic boundary conditions.

Support Design

Phase2 8.0 offers a wide range of support modeling options. Bolt types include end anchored, fully bonded, cable bolts, split sets and grouted tiebacks. Liner elements can be applied in the modeling of shotcrete, concrete, steel set systems, retaining walls, piles, multi-layer composite liners, geotextiles and more. New liner design tools include support capacity plots which allow you to determine the safety factor of reinforced liners.

FE Slope Stability

One of the major features of Phase2 is finite element slope stability analysis using the shear strength reduction method. This option is fully automated and can be used with either Mohr- Coulomb or Hoek-Brown strength parameters. The analysis parameters can be customized if required. Slope models can be imported from Slide and computed in Phase2 allowing easy comparison of limit equilibrium and finite element results.

Technical Specifications

Modeling

  • interactive geometry entry
  • boundaries – external, material, excavation, stage, joint, piezo, structural interface
  • grid/vertex/object snapping
  • sequential staging of excavation and support (up to 300 stages)
  • plane strain or axisymmetric analysis
  • one-click material assignment
  • import/export in DXF format
  • unlimited undo/redo
  • right-click editing shortcuts

Elements & Meshing

  • triangular or quadrilateral finite elements
  • 3 or 6-noded triangles
  • 4 or 8-noded quadrilaterals
  • one-click mesh generation
  • graded, uniform or radial meshing
  • mapped meshing
  • custom meshing
  • check/define mesh quality
  • easily apply boundary conditions

Materials

  • elastic or non-linear
  • strength criteria – Mohr-Coulomb, Generalized Hoek-Brown, Cam- Clay, Modified Cam-Clay, Drucker- Prager, discrete function
  • staged material properties
  • datum dependent properties
  • isotropic, transversely isotropic, orthotropic elastic models
  • import from RocLab/RocData

Groundwater

  • finite element seepage analysis
  • staged groundwater
  • material permeability functions
  • discharge sections
  • piezometric lines
  • pore pressure grids
  • include pore pressure for effective stress analysis

Support

  • staged support installation
  • bolt types – end anchored, fully bonded, cable bolts, Swellex, split-set, tiebacks
  • liner types – beam, reinforced concrete, geotextile, cable truss
  • composite liners
  • reinforcement database
  • Timoshenko or Bernoulli beam models
  • staged liner properties
  • elastic or non-linear
  • peak/residual strength
  • interactive support capacity plots (thrust/moment, thrust/shear) for reinforced concrete liners

Far-field Stress

  • constant stress field
  • gravity stress field
  • multiple stress fields (customize per material)
  • load split per stage or material

Loads

  • constant or linear distributed loads
  • concentrated load
  • seismic load
  • ponded water load
  • staged loading
  • springs

Joints

  • elastic or non-linear
  • Mohr-Coulomb, Barton-Bandis or Hyperbolic slip criterion
  • natural or artificial joints
  • pressurized joints
  • staged joint properties
  • statistical modeling of joint networks

Probabilistic Analysis

  • Rosenblueth point estimate method
  • random variables - materials, joint properties, field stress
  • contour / error plots of statistical Output

Finite Element Slope Stability

  • automated FE slope stability using shear strength reduction method
  • import/export Slide models Data Interpretation

Data Interpretation

  • view stress, displacement, strength factor contours
  • effective stress, pore pressure contours
  • contour user-defined data
  • stress/failure trajectories, deformation vectors
  • display deformations to userdefined scale
  • query and graph material, support, joint data
  • export to Excel
  • show values directly on model
  • highlight yielded material, support, joint elements
  • add iso-contours
  • data tips for any object
  • ubiquitous joints
  • annotation and dimensioning tool kit
  • save display options, drawings, annotations
  • export image/movie files

Applications

  • Dams
  • Embankments
  • Groundwater
  • Rock
  • Tunnels
  • Soil
  • Mining
  • Slope Stability
  • Retaining Walls
  • Excavations
  • Settlement
Rocscience Inc.
Rocscience Inc.
31 Balsam Avenue
Toronto ,  Ontario M4E 3B5

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