located beside each of the input parameter edit boxes
in the Sidebar.The parameters used as input for the Barton-Bandis criterion – phir, JRC, and JCS – can be estimated using convenient charts and tables built into RocData.
These charts and tables are accessed by selecting the Pick
button located beside each of the input parameter edit boxes
in the Sidebar.
When you select a Pick button, a table or chart will appear, allowing you to determine a suitable parameter value. The dialogs for estimating phir and JRC are provided below as examples.
Phi (residual) dialog
The residual friction angle phir can be calculated with respect to the basic friction angle phib, using the equation shown in the dialog (see the Barton-Bandis strength criterion topic for more information).
JRC dialog
The material list in the phir dialog can be filtered by moistened state (dry or wet), while the list in the JCS dialog can be filtered into properties for rocks and those for soils.
Once you have determined a value, select OK in the Pick dialog. The value will be automatically loaded into the Sidebar input data area, and the RocData calculation automatically carried out.
Select the Pick button for each of phir, JRC, and JCS, and experiment with the dialogs.