Liebherr LRB 255 - Manual (Page 10)

10
Due to impr
ovement and engineering pr
ogr
ess we r
eserve the right to change specifications without notice.
Hydraulic Sheet Pile –
Feeder
The Sheet Pile Feeder facilitates the
lifting of a steel sheet pile and its
positioning in the clamps.
It reduces rigging time and the
potential risk associated with pile
pitching.
The Sheet Pile Feeder consists of a
robust steel frame which integrates
a hydraulic cylinder with sheaves
and the rope suspension brackets.
A solid steel plate protects these
parts. The appliance further
consists of two fairlead plates with
baffles for the chains, together with
ropes and chains and connections
for the hydraulic and electrical
power supplies.
The Sheet Pile Feeder can be
mounted on all vibrators, provided
that there is a mounting point on
the suspension yoke. Hydraulic
power is supplied and the appli-
ance is controlled by the piling rig.
The fairlead plates, which can be
adjusted to suit various types of
profiles, are installed beneath the
vibrator. The chains are threaded
through the plates and are fixed
to the outer sides of the sheet piles.
The vibrator and the sheet piles are
lifted up and the sheet piles placed
in position (Diagram 1).
The hydraulic cylinder is extended,
thus tightening the ropes and
chains, and the vibrator is lowered
(Diagram 2). In this manner, the
head of the sheet pile is automati-
cally placed in the correct position
within the clamps.
The clamps are then closed.
2. 1.