Verification According to the Factor of Safety
When performing verification according to the factor of safety the program directly determines the value of the factor of safety SF. Verification condition has the form:
where: | Tact | - | shear forces along the slip surface |
Tres | - | passive forces along the slip surface | |
SF | - | safety factor | |
SFs | - | required safety factor (input in the "Stability analysis" tab) |
Typical values are e.g. - for walls of foundation pits SFs = 1.1 to 1.25, - for rock cuts of highways SFs = 1.2 to 1.5, etc.