Arc Failure Surface

Create Circular Failure Surfaces in Slope Stability Analysis (SAM, LEM).

Applicable Modules:

From the Main Menu, select Limit Equilibrium Method > Boundaries > Arc Failure Surface

From the Command Line, type 'CircularSurface'

    Boundary Set

Select the Boundary Set under which the Circular Failure Surface Boundary has to be assigned . Click to invoke the Define Boundary Set dialog to Add, Modify or Delete Boundary Set(s).

Grid Data

Specify the grid range within which the centers of arcs will be located.

Grid Spacing

Common spacing in both directions.

Radius Data

Specify the range of radius.

Method of using Arc Tangent Lines

Generate reference lines which will become the tangents to arcs.

Arc radius increment

Enter the increment for generating arc radius.

Number of Arc

Specify the number of incremental tangents. From the grid points, shortest lines to the tangents are generated.  

Change Tangent Direction

Rotate the tangent direction by 90 degrees.

Method of using Arc Radius and Length

Specify the range of radii and length.

Method of searching First Arc Radius

Shortest Radius

Use the shortest arc radius.

Passage Point

Define a point through which the arc will pass.

Arc radius increment

Specify the increment of arc radius to be increased from the first arc radius.

Number of Arc

Specify the number of incremental tangents. From the grid points, shortest lines to the tangents are generated.

Layer Set Limiting Passage

Specify a layer set through which no arcs will be generated.

After creating the supports, the dialog box will close upon clicking.

Click the ESC key to close the dialog box.