Download - Mammoet BV

“We combined
the SPMTs with a
gantry system”
LOCATION: PIERREFITTE NEAR PARIS,
FRANCE
JOB: REPLACING A RAILWAY BRIDGE
CHALLENGE: NARROW SITE, NEW
SPMT/GANTRY/STRAND JACK RIG
“This was the first
time Mammoet had
used this rig”
A1 Junction Upgrade Peterborough to Blyth
Mammoet installed a composite bridge
deck (650 tons) as part of the A1 Junction
upgrade project. This was the second
bridge of four that Mammoet has been
contracted to install. Mammoet first jacked
the bridge up from a relatively low build
position to the installation height in a laydown
area adjacent to the permanent
position for the bridge. Once at the correct
height, the SPMTs with packing supports
lifted the bridge free from the jacking
towers. The period available for installation
started at nine pm on Saturday and
finished at twelve noon on Sunday. The
bridge was installed onto the abutments at
twelve midnight. Mammoet completed its
South Africa will host the Soccer World
Cup in 2010 and is busy upgrading and
building stadiums for the tournament.
The construction work is under real time
pressure, especially as the country will be
hosting the Confederation Cup in 2009.
Mammoet Southern Africa is currently
busy placing 4,215 precast concrete
elements, including 1,560 seating units, in
the new Green Point Stadium in Cape
Town, in a joint venture with a local civil
engineering contractor. The work started
in December 2007 should be completed in
December 2008. The work on the lowest
tier was done with a crawler crane
provided by the joint venture partner.
The seating units in the middle tier were
work ahead of schedule which allowed
the road to be re-opened earlier than
planned.
In order to get permission for the closure
of the A1, Mammoet had to reduce the
requested closure time of 36 hours to 18
hours. Consequently, many Mammoet
employees had to work double shifts.
Despite a few last minute changes by the
local authorities, Mammoet still managed
to complete the work ahead of schedule.
This was a particularly difficult operation
due to the significant elevation changes
along the transport route and the hydraulic
stroke required for set down.
In the Shadow of Table Mountain
placed with an LR 1400 in a straight
crawler configuration and the units in the
upper tier with the LR 1400 in Super Lift
configuration as the radius was as much
as 64 meters. Mammoet Southern Africa
also provided supervision and two rigging
crews. The large number of units to be
placed and the presence of many tower
cranes on the site make this quite a
challenging job. Mammoet Southern Africa
was also contracted by the roofing
contractor to lift compression ring
segments with a mass of up to 23 tons
at a radius of up to 84 meters. This
was done with the LR 1400/2 fitted with
a 56 meter main boom, 63 meter luffing
jib and Super Lift.
LOCATION: A1 ROAD, ENGLAND
JOB: INSTALLING A BRIDGE DECK
CHALLENGE: CHANGES IN ELEVATION
Replacing a Railway Bridge Near Paris
In August the French railway operator shut a
railway line down for 82 hours to replace a
bridge across the RN1 road at Pierrefitte near
Paris. Mammoet started by removing the old
bridge (400 tons, 29 meters) and taking it to
a storage site. After that we installed two
precast abutments (370 and 430 tons). Finally
we installed the new precast bridge (780 tons,
37 meters). We used two sets of 22 lines
of SPMTs and paid special attention to
synchronizing them. To handle the abutments
we combined the SPMTs with a gantry
system fitted with four 300-ton strand jacks.
This was the first time Mammoet had used
Civil
this rig and it did a great job on the
narrow site and within the short time
available. The customer had not used
this construction method before but
was impressed and will use it for
future projects.
LOCATION: CAPE TOWN, SOUTH AFRICA
JOB: PLACING 4,215 PRECAST
CONCRETE ELEMENTS
CHALLENGE: HIGH FREQUENCY
LIFTING OPERATIONS, CONGESTED SITE