Figure 12-75.Typical uses of piles driven in a waterfront structure.
18. Treated timber pile. A timber pile impregnated
with a preservative material that retards or prevents
deterioration due to organisms.
When you are working with treated piles,
protective clothing, such as long sleeves,
gloves, and safety goggles, must be worn. The
preservative used in treated piles can irritate the
eyes and skin.
19. Concrete piles. Two types of concrete piles are
precast and cast-in-place.
Factors contributing to their
use are the availability of
concrete is made.
l Precast concrete
sections that are square or
near the tip. They vary in
the materials from which
piles are steel reinforced
octagonal in shape except
length up to 50 or 60 feet.
Because of their great weight, greater lengths are
generally not feasible. They require time for setting and
curing and storage space.
Precast concrete piles are
frequently driven with the aid of water jetting
(fig. 12-76). Water is forced through and out the pile tip
through jetting pipes constructed into the piles while the
pile is driven.
Figure 12-76.Water jetting precast concrete pile.