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Soil Properties
Material properties in Settle3D are defined in the Soil Properties dialog shown below. Up to 20 different soil types can be defined for a single model. For each material, parameters are separated into three categories:
A summary of the input parameters is given below. For detailed information about the definitions of Settle3D material parameters, see the Settle3D Theory Manual.
Soil Properties dialog
After defining the soil properties, the sequence and thickness of soil layers is defined in the Soil Layers dialog.
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Soil Properties: Immediate Settlement
Immediate settlement parameters consist of:
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1-dimensional Young's modulus: Es
1-dimensional unload/reload modulus: Eur
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If you do not want to consider immediate settlement in the analysis, you can turn off the Immediate Settlement checkbox for any material. If the checkbox is turned off, immediate settlement will not be computed for that material, and will be set to zero for the analysis.
Immediate settlement material parameters
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Soil Properties: Primary Consolidation
Primary consolidation parameters can be defined in terms of three different models:
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Linear
Non-Linear
Janbu
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If you are modeling time-dependent consolidation, then you will also be able to enter time-dependent consolidation parameters, as illustrated below. (If you are not considering time-dependent consolidation, then these parameters will be disabled).
Primary consolidation parameters (non-linear)
Primary consolidation parameters (linear)
Primary consolidation parameters (Janbu)
For further information see the Settle3D Theory Manual.
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Soil Properties: Secondary Consolidation
Secondary consolidation (i.e. creep) parameters consist of:
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Secondary compression index: Ca
Secondary recompression index: Car
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If you do not want to consider secondary consolidation in the analysis, you can turn off the Secondary Consolidation checkbox for any material. If the checkbox is turned off, secondary consolidation will not be computed for that material, and will be set to zero for the analysis.
Secondary consolidation material parameters
For further information see the Settle3D Theory Manual.
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Soil Properties: Vary by Depth
If you wish to define material properties which vary linearly with depth, select the Properties vary by depth checkbox, at the bottom of the Soil Properties dialog.
If this checkbox is selected, you will be able to enter a Top and Bottom value for most parameters (i.e. the value of the parameter at the top of a soil layer and the bottom of a soil layer). The top and bottom values are indicated by the letters t and b beside the applicable edit boxes, as shown in the figure below. A linear variation is assumed between the top and bottom values. If a given parameter does NOT vary by depth, then simply enter the same value for the top and bottom.
Soil properties dialog (properties vary by depth)
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Soil Properties: Strain Based
For the non-linear consolidation model, you can choose the Strain based Cc, Cr, and Ca option, at the bottom of the Soil Properties dialog.
In this case the Primary and Secondary Consolidation input parameters will request strain based compression and re-compression index values.
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Soil Properties: Wick Drains
If your model includes wick drains, you can customize the horizontal flow properties for each material, by selecting the Wick Drains button in the Soil Properties dialog. You will see the following dialog, which allows you to specify the ratio of horizontal to vertical flow in terms of either consolidation or permeability coefficients.
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Soil Properties: Editing
Soil properties and soil layers can be easily edited, allowing you to quickly carry out parametric analysis. For example, if you right-click on a soil layer in the 3D view, you can quickly access the Soil Properties or Soil Layers dialog from the popup menu. This will take you directly to the properties of the layer on which you clicked.
Right click editing shortcut in 3D view
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