GGU-CANTILEVER: Area loads
Up to 20 area loads can be positioned on the active side at any height.
The slip surface angle for the active earth pressure resulting from the self-weight of the soil is adopted for analysis compliant to DIN 4085.
When there are several soil layers, the program moves from layer to layer applying the appropriate angles of friction. The type of the resulting earth pressure distribution can be specified in 4 different ways.
For at-rest earth pressure, the area loads are calculated by increasing by the factor k0/kah in compliance with DIN 4085 Section 6.4.3.
Alternatively, it is possible to determine the demands placed on a wall from area loads using the theory of elastic half-space. The two load concentration factors "3" and "4" can be taken into consideration (see also the following Figure).
For over consolidated, cohesive soils the concentration factor "3" applies, where:
eop = q/π · (β2 - β1 + cosβ1 · sinβ2 - cosβ2 · sinβ2)For non-cohesive soils, or for cohesive but not over consolidated soils, the concentration factor "4" applies, where:
eop = q/4 · (sin³β2 - sin³β1)
Regarding the kind of earth pressure, area loads can be defined independent of the global preferences (see menu item "Editor 1/Type of earth pressure").