GGU-UPLIFT: Utilisation factor (buoyancy) using partial safety factors
Using the partial safety factor concept the following must be verified:

Ak = the characteristic hydrostatic buoyant force acting on the lower surface of the
complete structure, the soil layer in question or the excavation structureγg,dst = partial factor for destabilising permanent actions in the
UPL (EC 7) limit stateGk,stb = lower characteristic value of stabilising permanent actions
γg,stb = partial factor for stabilising permanent actions in the
UPL (EC 7) limit statelayer 1 (i = 1) is the uppermost layer
The so-called utilisation factor µ can also be calculated from this relationship.

µN = utilisation factor of layer N
Utilisation factors ≤ 1.0 mean that sufficient safety is given.