Retaining walls generally have little vertical load other than self weight and weight of any soil on a footing.
Line load surcharge retaining wall sheet.
Wall from earth pressure surcharge load water earthquake etc.
The wall could be a basement wall retaining wall earth support system such as sheet piling or soldier pile and lagging etc.
The earth pressure is acting.
Additional surcharge loads may be specified in the back side of the wall.
Vertical line load behind wall l lb ft or n m height of retaining wall h ft or m horizontal distance from wall to line load d ft or m output.
Struts or braces may be specified at any height s of the wall.
The stiffness of these elements can be modeled as linear elastic springs or fully nonlinear springs.
However this isnt the case if the retaining wall is.
In this example the surcharge from a 10kn m line load located just outside the area of influence could contribute and extra 113 to the load on the shoring frame.
Surcharge loads acting on retaining walls are additional vertical loads that used to the backfill soil above the top of the wall.
Area load point load line load and or strip load.
In figure 1 where a semi gravity wall is shown the live load surcharge is placed over any element of the ers for settlement and bearing analysis while the live load surcharge is placed behind all the elements of the ers for sliding and eccentricity analysis.
Surcharge load on plan surcharge 10 0 kn m2 applied vertical dead load on wall wdead 85 6 kn m applied vertical live load on wall wlive 3 8 kn m position of applied vertical load on wall.
This surcharge shall apply as a rectangular distribution to the full height of shoring.
Prior to completing any retaining wall design it is first necessary to calculate the forces acting on the wall.
Retaining wall design example with surcharge load.
It can be either dead loads for example sloping backfill above the wall height or live load which could result from the highway or parking lot paving or adjacent footing.
Four types of surcharge loads can be specified.
Height to resultant hr line load surcharge resultant rl overturning moment from point load ml.
The live load surcharge is positioned to produce the maximum design load.
In this example even thought the surcharge load is the same relative to the size of the earth pressures it seems much less significant.
