In Eurocode7, there are 3 types of Design Approach (DA) to calculate the ULS for GEO.
In DA1.2 and DA3, the angle of shearing resistance,? have to be reduced. For example, with ?=30, it needed to be reduce to arctan(tan30/1.25) = 24.8.
The cohesion,c' have to be reduced in DA1.2 and DA3. The...