Verification According to EN 1997
The value of capacity utilization Vu is calculated and then it is compared to 100%. The value of capacity utilization is given by:
In case of design approach 2 the resisting moment Mp is determined from non-reduced soil parameters but considering the reduction of resistance on the slip surface using the coefficient γRs.
In case of design approach 1 and design approach 3 the program reduces for the determination of the overall resisting moment Mp the strength parameters of soil (angle of internal friction and cohesion).