Lateral pressure from a concrete backfill

[Awre]

I have a gravity wall composed of concrete block, the total height will be about 40 feet.
The backfill at the bottom third of the wall will be filled with concrete for a width of 10 feet approximately.
For the stability calculations, I think I can assume some shielding from lateral loads because of the concrete mass behind the wall for sliding by friction.
Can I also assume some resistance against overturning because of the cohesion between the concrete backfill (after setting) and the wall? If yes, what is the approximate value for that cohesion?

Thanks

 

[JedClampett]

I'd just design for the same loads as no backfill. How much and who are you going to save? A few bars? A couple of inches of concrete?
Note that also you're going to need to control the rate of pouring the concrete to limit its lateral fluid load.

 

[Jrit]

A 40-foot gravity wall is a big wall. What type of system are you planning to use?

 

[LittleInch]

A drawing or sketch would help.

Size of the concrete blocks? 1m x 1m or blocks at 100mm thick.

Vertical wall?
Width? Do you mean depth ? - this is why we need a drawing as we can't see what's in your head, or screen.
Gabion walls are often angled backwards at ~ 7 degrees.

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