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# Create Slope Geometry

## 1. Introduction

The simplest type of 3D slope model, is a 2-dimensional slope profile which has been extruded in the third dimension to create a 3D slope with a constant profile. The following includes some advantages/features of Slope Wizard.

In this tutorial, we will demonstrate the Slope Wizard option.

• The Slope Wizard automatically creates an extruded slope geometry based on slope dimensions and angles input into the Slope Wizard dialog.
• The Wizard allows you to define one or more material boundaries to define multiple soil regions or weak layers, and assign material properties to the regions.
• The External volume is automatically defined.

The Slope Wizard option is very useful for quickly creating 3D extruded models for demonstration or teaching purposes.

## 2. Slope Wizard

In order to create a Slope Wizard follow the steps as below:

From the main menu toolbar, select Geometry and then click on Slope Wizard or click on the Add 3D Primitives icon/dialog . The following window will appear.

Select: Geometry > Slope Wizard

The default input data in the dialog will create a valid slope. If you simply select OK in the dialog, an extruded slope model will be created with one mouse click.

Close the file you just created, and we will start a new example.

Note: after creating a model with the Slope Wizard, you CANNOT return to the Slope Wizard dialog to make changes. If you want to edit the model, you will have to start a new file, or delete the existing geometry.

We will add two material planes to define a weak layer by implementing the following steps.

• Select: Geometry > Slope Wizard
• Select the Materials tab in the Slope Wizard dialog
• Select the Add Material Plane button twice, to add two planes
• Enter the left elevation and right elevation for the two planes, as shown below
• Assign Material 2 to the material above the lower plane
• Select Update Preview to check the input.
• Select OK.

Your screen should look as follows:

## Define Materials

From the main menu toolbar, select Materials and then click on Define Materials or click on the Define Materials icon/dialog . The following window will appear.

Select: Materials > Define Materials

For Material 1 enter Cohesion = 25 Phi = 20.

Define Material 2 as a weak layer. Enter Cohesion = 0 and Phi = 15. Select OK.

## 4. Symmetry

For the 2D extruded models created by the Slope Wizard, the Symmetry option is turned ON by default. The location of the symmetry plane is also automatically calculated, as you can see if you select Project Settings > Symmetry. Select either OK or Cancel in Project Settings.

Select the Slip Surfaces tab

You can see the line of symmetry displayed as a white dotted line above the model.

## 5. Compute

Save the file and Select: Analysis > Compute

## 6. Results

To view the results, select the Results Workflow tab.

After clicking Show Contour icon you should see the following results. You'll see Bishop FOS of 1.01 with base normal stress contour plot as shown below:

Experiment with the Slope Wizard, and try different slope dimensions and material planes, to become familiar with the capabilities of this option.

## 7. Slope Wizard tips/ some limitations

• The geometry which can be created by the Slope Wizard is limited to a simple slope profile with planar material boundaries. It is quick and easy to use tool for geometry creation.
• After you generate a model with the Slope Wizard, the editing capabilities for the model are limited.
• You cannot edit the coordinates of the slope.
• You cannot return to the Slope Wizard dialog to change the input.
• The Slope Wizard option is intended to be a tool for quick demonstration and teaching purposes. If you require more complicated geometry, you will have to build it using the regular Geometry creation and editing tools in Slide3.

This concludes the Create Slope Geometry using Slope Wizard.