I am designing footings of a retaining/bearing concrete wall. The sliding became an issue because the friction coefficient is low. I wonder if the slab-on-grade adjacent to the wall can be used against the sliding. Thanks for your help!
I'd say the answer is "no". You can lower the base of the wall and take advantage of passive earth pressures. You can also add a shear key, which is about the same thing.
Theres no question that a slab can take some of the load. I always like the what if game. What if later on someone removes the slab? Is it permenent with the life of the wall? With that in mind I'm with fattad, if you can't count on on it then lower the base and design for passive soil pressures.
I agree with toones. You can't be sure that someone in the future won't remove a portion of the slab. Not only that, but if you eliminate the isolation joint between the slab and wall, then differential settlement will crack the slab. In addition to the other suggestions, I've seen the foundation wall extended to each side of the building, creating a lateral shear key, if you will.