112 Ground improvement by deep vibratory methods
a function of time and can be plotted for each individual stone column in real
time or at the end of the shift. These data include for each stone column: time
of execution, depth, power, and stone consumption over depth, total stone
consumption, verticality of the leader, and optionally also the pressure of the
airflow and the stone column diameter.
a
a
a–a
Nozzle with stone outlet
Material gate
and air lock
Extension tube and
stone feeder pipe
(material storage)
Electric motor
Stone feeder pipe
Eccentric weight
Flexible coupling
Figure 4.3 Special features of a bottom feed vibrator.