Perimeter Support: Add Pressure

The Pressure option in Unwedge can be used to model the equivalent support pressure of any type of support system. It could also be used to model any type of general loading, which could be represented as a pressure on the excavation boundary. Note:

To add a Pressure to the perimeter:

  1. First, make sure you are viewing the Perimeter Support Design view (select the Perimeter Support Design button from the toolbar).

  2. Select the Add Pressure option from the Support menu.

  3. You will see the Add Pressure (on Perimeter) dialog. In the dialog:

  4. If you are applying Pressure on part of the perimeter, you will then be prompted to enter the starting and ending points for the Pressure on the perimeter. This can be done graphically with the mouse, or by entering coordinates in the prompt line.

NOTE: The Pressure is always created in a counter-clockwise direction around the perimeter, from the Start point to the End point. Therefore you must define the start and end points accordingly. If you enter the points in the wrong order, you will have to start over. If this occurs, press Escape to exit the option, or if you have already added an incorrect Pressure, select Undo.

Multiple Pressures

On the perimeter, you may define more than one pressure if necessary, by repeating the above steps. The pressures can be located anywhere on the perimeter, however, they cannot overlap (the program automatically checks for this, and does not allow you to add overlapping pressures).