Liebherr L 556 - Manual (Page 23)

Quarrying // 23
the most powerful machine. Every day, the wheel loader has to
extract and load more than 1,093 yd
3 of material. The machine
it replaces goes to the top for piling, loading lorries and feeding
the asphalt machine with grit. The drivers are all highly satisfied
with the Liebherr machines. One of them said the new 580
machine is the best machine he’s ever driven. And he’s been
driving wheel loaders for more than 20 years.”
The driver fills the shovel with several tons of gravel at the face,
apparently effortlessly. “Yes, the L 580 certainly does have power,”
says Gütler, adding with a twinkle in his eye, “but we’re lucky.
The good thing about Oberschwaben is the wonderfully loose
moraine gravel, which is easy for the wheel loader to pick up off
the face. We extract the gravel over several layers. On the lower
levels we have finer grain, while the coarser grains are higher up.
The finer layers are taken to the concrete plant, the coarser ones
to the grit plant. We produce grit for our asphalt with three crushers
and different sieves with grain sizes 0/2, 2/5, 5/8, 8/11, 11/16.
The charging hopper for grit production is located directly below
in the pit. Ultimately, the grit comes out next to the asphalt plant,
so we only have to cover short distances with the wheel loader.
The dumpers take the finer gravel for the concrete plant up to a
second charging hopper.”
After operations have finished, the area is reclaimed and the pit
recultivated. Gutler explains, “We don’t refill, but rather take the
spoil that we have taken away back to the pit bed and then add
a layer of topsoil. Effectively, everything is then as it used to be,
just 19 or 20 yards deeper. Some of the areas are used for
agriculture. But biotopes are also created, where nature can
evolve freely. For example, storks are often seen on this meadow
before they migrate to Africa.”
The L 580 wheel loader extracts more than 1,308 yd³ of material every day.
Sector:
Size of company:
Founded:
Location:
Managing Director:
Website:
Liebherr machines
in operation:
Company profile
a + b
Asphalt, ready-mixed concrete, gravel, sand
65 employees
1970
Biberach, Ingoldingen, Ochsenhausen, Aulendorf,
Otterwisch
David Gütler
www.asphalt-und-beton.de
30 Liebherr truck mixers, 3 with conveyor
belt, L 580 and L 576 wheel loaders,
TA 230 Litronic dumper truck, R 932 excavator