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Project Settings
The Project Settings dialog is used to configure the main analysis options in Phase2:
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Stages
Units
Groundwater
Strength Reduction
Analysis Type
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Project Settings: Stages
If you are creating a multi-stage model in Phase2, you need to define the number of Stages in the Project Settings dialog.
Defining the number of stages
Staging in Phase2 allows you to model the sequential removal or excavation of material, in as many as 300 separate stages. Staging can be applied to support installation (e.g. bolts and liners), loading, material properties, groundwater and other modeling options.
Staged model of power cavern excavation, with liner and bolt support
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Project Settings: Measurement Units
Six different measurement unit options are available in Phase2. The units are determined by selecting the desired unit of stress measurement in Project Settings:
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Metric units (stress) - MPa, kPa, tonnes/m2
Imperial units (stress) - ksf, psf, tons/ft2
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Measurement unit options
All input parameters in the program (e.g. coordinates, material properties, loading) will correspond to the selected stress measurement unit.
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Project Settings: Groundwater
Groundwater pore pressure in Phase2 can be modeled using:
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Piezometric lines
Water pressure grid
Finite element analysis
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The groundwater method is selected in the Project Settings dialog
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Project Settings: Strength Reduction
The Strength Reduction option in the Project Settings dialog allows you to perform a finite element slope stability analysis with Phase2. To enable the Shear Strength Reduction method, select the Determine Strength Reduction Factor checkbox, under the Strength Reduction tab in the Project Settings dialog.
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Project Settings: Analysis Type
The Analysis Type option in Project Settings allows you to choose Plane Strain or Axisymmetric analysis.
In most cases, a Phase2 model represents a Plane Strain analysis (i.e. a 2-dimensional analysis where it is assumed that the excavation is of "infinite" length in the out-of-plane dimension).
Plane strain model of tunnel with bolt support
The Axisymmetric option allows you to carry out a 3D stress analysis of an axially symmetric excavation. The 3D excavation is defined by a 360 degree rotation of the External boundary around the vertical (x=0) axis. A typical use of Axisymmetric analysis is to model the stress and deformation around the end of a circular tunnel.
Axisymmetric model of circular tunnel
For more information see the Axisymmetric Analysis tutorial.
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