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# Pile Patterns Feature

Here we'll explore the Add Pile Pattern feature. This feature is useful primarily when you want to break apart the pattern, or when you have different soil profiles that you want to examine the same pile in. More information on this feature can be found in the Add Pile Pattern topic.

To begin:

Select Piles > Add Pile Pattern or click on the Add Pile Pattern icon in the toolbox.

## 1.0 Breaking Apart Pile Patterns

### 1.1 PLACING THE PILE PATTERN

The Geometry tab of the dialog is used to define the length and orientation of the piles. We won't examine this in detail here.

In the Pattern tab of the Add Pile Pattern dialog, pile locations can be specified using the Layout of Rectangular or User-defined options as shown below:

Pattern tab of the Add Pile Pattern dialog (from left: Rectangular option, User-Defined Locations option)

In this example we'll use the Rectangular option and keep the default values illustrated in the screen shot above of rectangular pattern. For our purposes this is sufficient to define the pile pattern. Click OK to close the dialog.

You will be prompted to place the pile pattern - note that you are placing the center of the bottom left pile in the pattern. Type (0,0) into the command prompt at the bottom right of the screen and press enter to add the pile group.

You can also achieve the same result using the user-defined option.

Select: Pattern > Layout > User defined.

You will see the Add Pile Pattern dialog. Select Append rows as shown below and enter 9 for rows.

Enter the following coordinates which represent each pile location.

 0 0 1.5 0 3 0 0 1.5 1.5 1.5 3 1.5 0 3 1.5 3 3 3

Note: The entered coordinates are local coordinates with respect to the left bottom pattern coordinate. For instance, if our pattern coordinate was chosen at (0,0), then these coordinates are plotted starting at (0,0). On the other hand, if the user has chosen pattern coordinate of left bottom to be (5,0), the first entered pile in the coordinate will be offset by (5,0) and the rest of the corresponding coordinates.

If we apply this pattern at (0,0), it will overlap the rectangular pattern. If we apply this patter at (5,0), then it will apply the pattern at (5,0). Try this and you can see that equal pattern of piles have been added using the user-defined feature.

You can also change the pattern name by right clicking on the pile group and selecting Pile Display Options. Right beside the ‘Show Label Names’ checkbox you can select the format and change the format of the pattern name as shown below. (i.e. If pattern: \$A : \$B \$C, you will see the pile labels change to ‘Pattern : Pile1’.

### 1.2 UNGROUP PILE PATTERN

Right-click on any pile in the pattern and select Ungroup Pile Pattern.

Now you can go into each pile and define the desired loading. Everything else will have been defined when you defined the pattern including pile properties, length and orientation. If applicable, displacement profiles and p-y multipliers may also have been defined.

Note: If you add a new pattern of piles, the numbering sequence starts from the previous pile group. For instance, in our example the first pile group ended with 9th pile group. If you add another pile group, it will start with 10 and add sequence of piles onwards.

If in case you have deleted one of the ungrouped piles (i.e. pile 9) and you add a new pattern, the new pattern numbering starts from the deleted pile number (pile 9) and will add the rest of the piles sequentially.

### 1.3 CATEGORIZE PATTERN - REGROUPING PILES OR CREATING NEW PILE PATTERNS

To re-group or create a new pile pattern from existing individual piles:

1. Select Piles > Categorize Pattern from the menu.
2. Use your mouse to select the piles for the new pile pattern.
3. Hit Enter.
4. A dialog will appear prompting you to select the pile whose properties will be used as the template for all the piles in the new pile pattern.
5. Once you have selected the pile, click OK to close the dialog.

## 2.0 Looking at the same pile in multiple soil profiles

The other main way in which the pile pattern is useful is if you want to examine the exact same pile, under the same loading conditions, in different soil profiles.

For this case you can easily define a model in which you can line up borehole locations and pile locations.