push wall foundation and design

[nothna]

I am designing a push wall for a waste facility. I am using the breakout force of the loader (95 kN) at the middle of the wall. that creates a moment that represent the horisontal force of 44kn at the top of the wall.
This will be designed as retaing wall as the contractor will then use crushed stone and asfalt as the base for the loader. Any ideas on how to design this wall so it will be capable of handling 44 kN at the top of the wall? can an contribute stability from the two connecting walls as support?

 

[DaveAtkins]

I recommend spreading the concentrated force from the bucket across a larger width of wall, as appropriate. For example, the bucket could be at one end of the wall, and the load could only spread along the wall in one direction, not two directions.

And yes, if you have perpendicular walls which are tied in, they will help resist the force.

If you aren't comfortable using the perpendicular walls, design it as a cantilever retaining wall. Check overturning and sliding, and design the concrete and reinforcing steel.

DaveAtkins

 

[nothna]

Not sure what you mean spreading the load. the wall is about 10m in length. If the horizontal force at the top is set to 44kn/m. Should i constribute the load to be 4.4kn/m instead?
Not sure how the point load would act across the length of the wall, i guess it is not right to assume its 44kn/m.

 

[DaveAtkins]

The breakout force of the bucket is 95kN, so this is applied at the top of the wall. However, this is not a point load, because the bucket has a width (maybe that is how you came up with 44kN, I don't know). But even spreading the force across the width of the bucket is conservative, because the wall is wider than the bucket. You can use as much width of wall to resist the 95kN force as you are comfortable with.

DaveAtkins

 

[nothna]

oh thanks! understand. Well the soil only seem to handle about 23 kn at the top. If i were to constribute the load across half the length of the wall
(10m) and with a safety factor of 1,5. i would get 14 kn. not sure if im comfortable with that though.