A. Tim Garrison of ConstructionCalc.com, a professional engineer, author, and software producer for the building industry, responds: While the 2003 IRC (Section R404.1.2) allows unreinforced concrete basement walls in some circumstances, I've seen far too many cracked and fractured unreinforced walls to think for a minute that it's okay to leave rebar out. It's possible to pin the wall to the proposed driveway slab, but it would do little good. Presumably the top of the wall is already connected to the first floor's framing and thus restrained from further bowing.
Reinforced concrete buttresses connected to the existing foundation wall and slab floor with epoxied rebar dowels should prevent further movement in this bowed basement wall.
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