01 Jul 97
6. Types of Deep Foundations
(Table 1-2). Large displacement and small displacement
piles are fabricated prior to installation and driven into the
Deep foundations are classified with respect to displacements
ground, while nondisplacement piles are constructed in situ
as large displacement, small displacement, and
and often are called drilled shafts. Augered cast concrete
nondisplacement, depending on the degree to which installation
shafts are also identified as drilled shafts in this publication.
disturbs the soil supporting the foundation
Types of Deep Foundations
a. Large displacement piles. Driven piles are classified by
the materials from which the pile is constructed, i.e., timber,
concrete, or filled or unfilled steel pipe.