is about 19 miles from the epicenter of
the 6.3 Richter magnitude earthquake,
which was in Lyttleton.
Key to the reconstruction of Wairakei
Road was milling the heavily-damaged
road to prepare it for resurfacing.
Timing was critical since this main arte-
rial needed to be unimpeded in the early
morning from 7am to 9am and again
from 4pm to 6pm to accommodate
Christchurch commuters.
Fulton Hogan, a leading Australasian
civil contracting company with 5,000
employees, was engaged by maintenance
contractor, City Care, to undertake the
road milling and preparation work for
asphalt paving. As a leading provider
for the CCC, Fulton Hogan understood
the importance of their role in the
reconstruction of the city.
“Our original thought was to mill the
top 30 to 40 millimeters off, but the road
had slumped and heaved so much that
it would have remained an unacceptable
ride when completed,” said Tim Clark,
Fulton Hogan’s Canterbury surfacing
manager. “Instead, we proposed the
Trimble® GCS900 system with Fulton
Hogan’s milling machines, so that we
could mill to a design ensuring a smooth
surface for paving.”
Fulton Hogan stated that the
Trimble technology was critical for
accommodating the extremely uneven
surface in order to quickly return it to
the acceptable baseline for resurfacing.
“We knew that traditional milling
to design would be prohibitively slow
when milling such a surface,” says
Clark. “We were sure that using Fulton
Hogan’s milling hardware, teamed with
the Trimble 3D control system, would
deliver the best possible surface with the
least disturbance to the road user and
neighbouring residents.”
With the help of its local Trimble
dealer, Fulton Hogan installed the
Trimble GCS900 system on its Wirtgen
W1200 cold milling machine. Both par-
ties have worked to perfect the system
for such a use, and it is now considered,
by many, as an integral part of delivering
industry-best results.
e Wirtgen W1200 is a 20-tonne,
cold-plane, milling machine, manufac-
tured in Germany, which runs on four
tracks with independent height control.
e ability to control the height at each
corner of the machine allows predeter-
mined surface profiles to be produced.
is machine is designed to remove a
1200-millimeter wide 300-millimeter
deep cut in a single pass.
e Trimble 3D milling system is
designed to make it possible to mill
“We were sure that using Fulton Hogan’s milling hardware, teamed with the Trimble 3D control
system, would deliver the best possible surface with the least disturbance to the road user and
neighbouring resident,” states Tim Clark, Fulton Hogan’s Canterbury surfacing manager.
The Trimble 3D milling system is designed to
make it possible to mill surfaces at variable
depth and slope without string lines.
Displayed with permission • Machine Control Magazine • Vol. 3 No. 2 • Copyright 2013 Spatial Media • www.machinecontrolonline.com
(16 pages)
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