Concentrated Surcharge - Active Earth Pressure
The concentrated load (resultant F due to surface or concentrated load - see figure) is transformed into a line load with a limited length. If the width of surface load b is smaller than the distance a from the back of wall (see figure) the alternate line load f having length l+2(a+b) receives the form:
where: | F | - | resultant due to surface or concentrated load |
a | - | distance of load from the back of wall | |
l | - | length of load | |
b | - | width of surface load |
If the width b of surface load is greater than the distance a from the back of wall (see figure) the alternate strip load f having length l+2(a+b) and width (a+b) reads:
where: | F | - | resultant due to surface or concentrated load |
a | - | distance of load from the back of wall | |
l | - | length of load | |
b | - | width of surface load |
Alternate load for calculation of increment of active earth pressure
For non-homogeneous soils the program proceeds as follows.