is set in place, a hole for a driftbolt is bored through the
PLACING PILES BY JETTING
cap into the top of each pile, and the driftbolts are driven.
The transverse and longitudinal bracing is then put on.
Jetting often makes pile-penetration easier. Jetting
Sometimes, however, the bracing may be installed
is the process of forcing water under pressure around
before the piles are capped.
and under the pile to lubricate and/or displace the
surrounding soil, as shown in figure 8-25. In soils other
Figure 8-25.Jetting with a single jet pipe,