In
a deep foundation, the slab is supported on deep piers that carry loads
below the zone where movement of the soil from seasonal changes in
moisture is expected. In general, a deep foundation is expected to
exhibit superior performance to a slab-on-grade foundation.
Several types of deep foundations are available, including:- Slab-on-grade with piers.
- Elevated structural slab with a crawlspace.
In
general, design of deep foundations is outside of the scope of this
website, and is addressed by SlabWorks™. One exception is the heave
conditions of a slab-on-grade with piers, which must be designed to
either structurally resist uplift forces or behavior as a stiffened
slab-on-grade and control deflections.
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