This part of the window serves to introduce basic parameters of soils - unit weight, angle of internal friction and cohesion. The particular values are obtained from geotechnical survey or from laboratory experiments. If these data are not available, it is possible to exploit built-in, which contains values of selected characteristics of soils. The characteristics of rocks are not listed in the database built, these parameters must be defined manually. Approximate parameters of rocks are presented in the theoretical part of the Help .
The analysis method of slope stability differs for:
- drained conditions: for the slope stability calculations to determine equilibrium conditions on the slip surface (N*tgφef + cef*l. , ) is considered according to the equation
- undrained conditions: in case of cu*l. for the calculation of passive forces on the slip surface ( , ) is considered according to the equation
In some countries it is customary to specify both shear strength parameters φu, cu for . In this case it is necessary to specify the task as an using parameters φef, cef in program " ".
The associated theory is described in detail in chapter "".
Dialog window "Add new soils" - "Basic data"