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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.