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Groundwater
Phase2 has a variety of methods for modeling groundwater:
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Finite Element Seepage Analysis
Piezometric Lines
Water Pressure Grid
Ru Values
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The Groundwater Method is selected in the Project Settings dialog.
Project Settings dialog, groundwater options
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Groundwater: Finite Element Seepage Analysis
If the Groundwater Method = Finite Element Analysis, then you can perform a steady-state, saturated-unsaturated finite element groundwater seepage analysis with Phase2. The seepage analysis is fully integrated with the stress analysis. The pore pressure distribution and other quantities such as flow rate, hydraulic gradient and discharge velocity are calculated.
Flow lines and Total Head contours after seepage analysis
For more information see the Finite Element Groundwater Seepage page.
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Groundwater: Piezometric Lines
Groundwater pore pressure can be modeled using Piezometric Lines. Just set the Groundwater Method = Piezometric Lines in the Project Settings dialog, and use the Add Piezometric Line option to define the piezo line coordinates. Multiple piezo lines can be defined, and assigned to different materials or different stages.
Piezo line representing a water table
Assigning staging of piezometric lines to materials
Staged Piezometric Lines representing water table drawdown in excavation
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Groundwater: Water Pressure Grid
Groundwater pore pressure can be modeled by a grid of values at x-y coordinates. This allows you to import field measurements or the output from a seepage analysis program. The data can be in the form of Total Head, Pressure Head or Pore Pressure, according to the setting of the Groundwater Method in Project Settings. The data can be entered in a spreadsheet or imported from various file formats (e.g. comma, tab or space delimited text files, pwp files, Slide groundwater files).
Using the data at the grid points, Phase2 will calculate the pore pressure at each node of the finite element mesh, using one of several different interpolation methods which are available.
Water Pressure Grid dialog
Water pressure grid data locations
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Groundwater: Ru Values
Pore pressure for a material can also be defined by an Ru value. The Ru option simply models pore pressure as a fraction of the vertical earth pressure. To enable the Ru option:
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Groundwater Method = Piezometric Lines (in Project Settings)
Piezo to Use = None (in Define Hydraulic Properties)
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You will then be able to enter an Ru value for the material as shown below.
Ru pore pressure option
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