Hydraulic vibrators
Hydraulic Vibratos
Hydraulic vibrators have wide applications in driving and extracting sheet piles, profi les and steel pipes and are also ideally suited to offshore and underwater work, where they can operate to considerable depths. When modifi ed, non-piling applications that the machines can be used for include soil compaction and construction of vertical drains. PVE (Piling and Vibro Equipment) have concentrated on improving performance and reducing still further unwanted external vibrations from this quiet and intrinsically environment-friendly techonlogy
Standard frequency
The range of standard units spans nine models, delivering between
450kN and 4400kN of centrifugal force.
High frequency
High frequency units transmit less vibration to the direct vicinity
and are recommended for use in built-up areas. The four models
available deliver between 380kN and 1120kN of centrifugal force
Variable moment
At the very forefront of developments, PVE have now introduced
a range of variable moment (VM) units which employ automatic
or manually adjustable eccentrics that allow the machine to
accelerate to maximum speed before the vibrating action begins.
Vibration is also disabled before the machine stops. The benefit
is that no low-frequency vibrations are generated at any time
during operation, making VM units particularly suitable for use
close to highly sensitive structures or services. The eight VM
models deliver between 580kN and 2200kN of centrifugal force.
Excavator mounted vibrators
Dawson excavator mounted vibrators have been designed specifi cally to work in place of an excavator
bucket to drive and extract piles. The pile can be lifted to vertical using the built-in lifting chain where
it is then gripped tightly in a powerful hydraulic jaw.