Pier Foundations: Typical Steps in the Construction of a Drilled Pier.
like reinforced concrete member. Piers are often of large enough diameter to enable down-hole
inspection. Piers are also commonly referred to as drilled shafts, bored piles, or drilled caissons.
Figure 5.7 shows the typical steps in the construction of a drilled pier.
FIGURE 5.7 Typical steps in the construction of a drilled pier. (a) Dry augering through
self-supporting cohesive soil; (b) augering through water-bearing cohesionless soil with aid
of slurry; (c) setting the casing; (d) dry augering into cohesive soil after sealing; (e) forming
a bell. (After O’Neill and Reese 1970; reproduced from Peck, Hanson, and Thornburn 1974.)
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PIER FOUNDATIONS
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