# How to Use Rocscience Slide2 for Slope Stability Analysis: A Step-by-Step Tutorial
Rocscience Slide2 is a powerful software for 2D slope stability analysis. It allows you to model complex geometries, materials, pore water pressures, external loads, and support systems. It also offers various methods of analysis, such as limit equilibrium, finite element groundwater seepage, probabilistic analysis, sensitivity analysis, back analysis, and seismic analysis.
In this tutorial, we will show you how to use Rocscience Slide2 to perform a basic slope stability analysis. We will cover the following steps:
- Creating a new project and setting up the project parameters
- Defining the external boundary and the slope surface
- Assigning materials and properties to the slope
- Adding pore water pressure and external load
- Defining slip surfaces and performing grid search
- Viewing and interpreting the results
## Step 1: Creating a New Project
To start a new project in Rocscience Slide2, follow these steps:
- Open Rocscience Slide2 by double-clicking the icon on your desktop or from the Start menu.
- A new blank document will open, allowing you to begin creating your model.
- Go to Analysis > Project Settings to set up the main analysis parameters, such as failure direction, units of measurement, analysis methods, etc. For this tutorial, we will use the default settings.
- Go to Analysis > Project Summary to give your project a title and a description. For this tutorial, we will name it \"Slope Stability Tutorial\".
## Step 2: Defining the External Boundary and the Slope Surface
The external boundary in Rocscience Slide2 is a closed polyline that encloses the soil region you wish to analyze. The uppermost segments of the external boundary represent the slope surface. All other segments are arbitrary and can be extended as far out as necessary.
To define the external boundary and the slope surface, follow these steps:
- Select Add External Boundary from the toolbar or the Boundaries menu.
- Click on the drawing area to start drawing the boundary. You can use the prompt line at the bottom right corner of the window to enter coordinates or distances.
- To finish drawing the boundary, right-click and select Close Polyline from the pop-up menu.
- To edit the boundary, select Edit Boundary from the toolbar or the Boundaries menu. You can drag the vertices or add new ones by double-clicking on a segment.
- To define the slope surface, select Define Slope Surface from the toolbar or the Boundaries menu. Click on each segment that belongs to the slope surface. The selected segments will turn red. To finish defining the slope surface, right-click and select Done from the pop-up menu.
## Step 3: Assigning Materials and Properties to the Slope
The next step is to assign materials and properties to the slope. You can define different materials for different regions of the slope, such as soil layers or weak zones. You can also assign different strength models and parameters for each material.
To assign materials and properties to the slope, follow these steps:
- Select Add Material Region from the toolbar or the Boundaries menu.
- Click on the drawing area to start drawing a closed polyline that defines a material region. You can use snap points or existing boundaries to help you draw.
- To finish drawing a material region, right-click and select Close Polyline from the pop-up menu.
- Repeat steps 1 to 3 for each material region you want to define.
- To edit a material region, select Edit Material Region from the toolbar or the Boundaries menu. You can drag the vertices or add new ones by double-clicking on a segment.
- To assign a material and properties to a material region, select Assign Material Properties from the toolbar or the Materials menu.
- In the Material Properties dialog box that appears, select a material region from the list on the left. You can also create a new material by clicking on New Material at
the bottom of the list.
- On the right side of the dialog box, enter or select a strength model and parameters for your material. You can also enter other properties such as unit weight,
elastic modulus, Poisson's ratio, etc.
- Repeat steps 7 and 8 for each material region you have defined.
- Select OK to save your changes and close the dialog box.
## Step 4: Adding Pore Water Pressure and External Load
The next step is to add pore water pressure and external load to your model. Pore water pressure can affect