The solution was pouring what we call a “bench wall,” which is basically a reinforced retaining wall poured against and tied into the original foundation wall. Before starting, we checked an area where the slab had broken and discovered that there was no footing under the original wall. The engineer’s answer was to excavate under the original foundation in alternating 2-foot sections, supporting the old wall while allowing the new concrete footing to extend into the voids under the wall.
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