Compute
By default in RocSlope2, Auto Compute is ON. When Auto Compute is enabled, the RocSlope2 analysis is automatically computed every time:
- Input data is entered or modified in a dialog (e.g. Project Settings, Slope Geometry, Slope Properties, Joint Orientations, Joint Properties, etc.), and Apply or OK is selected in the dialog
- Loading or Support is added or edited
- A previously saved file is opened
This ensures that the latest analysis results are always presented in the Results Grid and Results Details, all RocSlope2 models (Wedge, Planar, and Toppling models), and all views (Stereonet View, Charts, 2D and 3D Views etc.).
Auto Compute
You can turn Auto Compute OFF when you want to make multiple model changes without waiting for a recompute after each change.
To turn Auto Compute OFF or ON
- Select Home > Analysis and click the Compute
drop down arrow. - Deselect Auto Compute
When Auto Compute is OFF
- Results are not recalculated after model changes until you select Home > Analysis > Compute.
- If the model has changed such that stored results are out of date, the lower status bar shows Results Not Computed.
- After you run Compute successfully, the indicator is cleared and results reflect the current model.
When Auto Compute is turned back ON while results are out of date, RocSlope2 will recompute so the displays return to current results.
Geometry Validation
RocSlope2 always checks if the block geometry is valid, before proceeding to calculate a Safety Factor for a given block. If the orientation of the Joint planes, Slope planes and Tension Crack (if present) do not form a kinematically admissible block (i.e. a block which can be removed from the slope for an analysis method), then you will see the message "No Block Formed" displayed in the respective Analysis Window, and the analysis will not be computed.
Wedge Analysis Validation
Goodman and Shi's Block Theory is used to determine the validity of a block.
Planar Analysis Validation
If no planar joints are present due to the sliding lateral limit, then no blocks are formed.
Toppling Analysis Validation
There are limitations to flexural block analysis and block toppling analysis. They are listed in their respective manuals.
Computed Results
The following data is computed for each analysis:
Wedge Analysis
- Wedge ID
- Factor of Safety
- Wedge Volume
- Wedge Height
- Wedge Weight
- Area (Joint 1)
- Area (Joint 2)
- Area (Slope Face)
- Area (Upper Face)
- Force (Joint 1)
- Force (Joint 2)
- Force (Basal)
- Stress (Joint 1)
- Stress (Joint 2)
- Stress (Basal)
- Strength (Joint 1)
- Strength (Joint 2)
- Strength (Basal)
- Driving Force
- Resisting Force
- Sliding Direction (Plunge)
- Sliding Direction (Trend)
- Line Of Intersection (Plunge)
- Line Of Intersection (Trend)
- Line Of Intersection (Length)
- Trace Length (Joint 1)
- Trace Length (Joint 2)
- Persistence (Joint 1)
- Persistence (Joint 2)
- Intersection Angle Slope Face (J1/J2)
- Intersection Angle Upper Face (J1/J2)
- Intersection Angle Slope Face (J1/Crest)
- Intersection Angle Upper Face (J1/Crest)
- Intersection Angle Slope Face (J2/Crest)
- Intersection Angle Upper Face (J2/Crest) (°)
- Joint 1 Info
- Joint 2 Info
- Basal Joint Info
Planar Analysis
- Wedge ID
- Factor of Safety
- Wedge Volume
- Wedge Height
- Slope Height
- Unit Weight
- Slope Angle
- Failure Plane Angle
- Upper Face Angle
- Tension Crack Angle
- Sliding Direction (Trend)
- Sliding Direction (Plunge)
- Waviness
- Bench Width
- Failure Plane Length
- Slope Length
- Tension Crack Length
- Normal Force
- Normal Stress
- Shear Strength
- Driving Force
- Resisting Force
- Joint Info
Toppling Analysis
- ID
- Factor of Safety
- Joint Info