Liebherr R 954 C Litronic Demolition - Manual (Page 2)

GB_R954C.fh9 12.09.2007 13:44 Uhr Seite 2
C M Y CM MY CY CMY K
The general rule for demolition work within cities is that it is done
with the help of hydraulic excavators. In contrast to other methods
like blasting or using cable cranes with wrecking balls, this method
allows a selective dismantling with little detrimental exposure to
close-by residents. In the city of Hamburg, Germany, the six story office building of
the Springer-publishing company, located on the “Fuhlentwiete”
in downtown Hamburg, which had been built in 1975, was taken
down. The so-called „HÖRZU-building“ was to be replaced with
a larger and more modern nine story office building, plus a two
level underground parking garage. The demolition involved the
28 m high building with a useable volume of 28.000 m
3 and a
floor space of 9.000 m 2 plus an underground parking garage.
Assignment Report Situation Solution
The contract for the demolition was awarded to the WIWA Wilko
Wagner company. After two weeks of hazardous waste
decontamination it took only three and one half weeks to dismantle
the building. The WIWA Wilko Wagner company employs some
50 blue color and 14 white collar workers and being a well known
firm in the field of demolition, recycling, sanitation and earthmoving
enjoys many years of experience. With several subsidiaries
specializing in the decontamination of buildings, container service
and building material recycling they have at their command a
complete range of service for any size of demolition job and
technical requirement.
Very close neighboring buildings on the corner of ABC-street and
Fuhlentwiete posed special planning and organizational challenges
on the demolition contractor. Both the Fuhlentwiete, an important
inner-city thorough fare, and the ABC-street were definitely needed
for work and safety space, but the authorities allowed the
Fuhlentwiete to be blocked only on weekends. The ABC-street
was blocked full time.
Because the work time was limited to weekend days only, the
WIWA Wilko Wagner company used two high-performance
Liebherr excavator models R 954 with Long-front attachments
for the selective, vibration free dismantling process. With attached
hydraulic shears the building was cut down with as little vibrations
as possible.
R 954 C VH-HD Litronic
Operating weight
with demolition attachment 28.0 m _________approx. 72 tonnes
Engine _________________Liebherr D 936 L / 6-cylinder in line /
Stage III A / Tier 3
Output per ISO 9249 ____________240 kW/326 hp at 1,800 rpm
Track gauge of the hydraulically
adjustable under-carriage _____________2,380 mm – 3,330 mm
Counter weight – three-piece _____________________12 tonnes
(1 tonne + 8 tonnes + 3 tonnes)
Cab upward tiltable by 30 ° on tilt device
with integrated protective grating
Front shield and cab roof window equipped with shot proof glass
Demolition attachment
with a max. reach height of 28.0 m consisting of:
Demolition bolt-in boom ____________________________11.3 m
Intermediate boom extension _________________________2.5 m
Demolition stick ____________________________________8.55 m
Back-hoe attachment:
Bolt-in boom _______________________________________5.5 m
Stick HD ___________________________________________2.9 m
Technical Data Attachment
The R 954 C VH-HD weighed over 71 tonnes and was equipped
with interchangeable back-hoe and demolition attachments. The
28.0 m demolition attachment consisted of an 11.3 m demolition
bolt-in boom, a 2.5 m intermediate extension and an 8.55 m
demolition stick. The machine is powered by a state of the art
6-cylinder Liebherr diesel engine delivering 240 kW/326 hp.
The second special Liebherr excavator, an R 954 B “Longfront”,
weighed in at 61 tonnes and is powered by a 222 kW/302 hp
Liebherr diesel engine. With an 8.5 m demolition bolt-in boom
with a 2.5 m intermediate extension and an 8.55 m demolition
stick the machine could reach to a max height of 25.0 m.
The two special excavators were assisted by two Liebherr Standard
excavators in the 20-25 tonne range: a crawler excavator R 914 B
and a rubber-tire excavator A 904 C.
The resulting rubble was hauled by the WIWA Wilko Wagner
company during the demolition process to their own recycling
facility. In this depot, which is close to down town and authorized
by the German Federal Emission the 7,000 m
3 of rubble were
processed for reuse by their building material subsidiary. The
500 tonnes of steel scrap accumulated during the demolition
were also processed for reuse.