scattered out all over the project site and had to be moved on multiple
occasions to accommodate other contractor work scopes. As
space near Cajun’s work areas became available, materials were
moved again to make installation into the basin safer and easier.
The consistent re-staging of heavy and large materials was a constant
obstacle that Cajun had to overcome as construction activities
progressed.
Scope of work
At the time of Cajun’s mobilization to the island, the project had
already commenced, and other contractors were on site. Cajun’s
piling crew was brought to the site because of Cajun’s reputation
on its three core principles: safety, quality and production.
Cajun’s history of providing the highest level of quality was a
major factor in being awarded the initial scope of the piles at the
MMLS structures.
Having another piling contractor on site presented a challenge
that was not normally present on other piling projects. Cajun
crews were informed to respect the work of the other piling contractor
and to assist them in any facet necessary in order to benefit
all parties involved in the project.
Cajun’s scope of work was designated to the elevated portions
of the island and the west side MMLS structures, eliminating
any scheduling or construction conflicts with the other piling
contractor. With the MMLS pile location tolerance being a high
priority, Cajun mobilized specialized pile installation equipment to
ensure that all piles installed could meet the required plus/minus
two-inch pile location tolerance as stated by the project specifications.
The specialized system consisted of a 275-ton Terex crane,
Berminghammer hydraulic lead system with driving template
and a diesel impact hammer. The Berminghammer hydraulic lead
system gave Cajun the ability to raise/lower the leads on a vertical
travel system to ensure the top of pile location accuracy, regardless
of the elevation of the crane tracks. The hydraulic horizontal
offset of the leads enabled the piles to be pivoted up to 30 degrees
in both directions to ensure that the piles could be driven square
to axis, as drawn on the project plans. The leads also married up to
a template system, which was laid out on the working surface by
Cajun surveying, to ensure that the piles were placed in the exact
designed locations.
Expanding project scope
After being on site for two months and installing 15 percent of the
original contract pile quantity, Cajun was presented an opportunity
to provide IHI with turnkey pricing on four large basins (Z-4001
Refrigerant Impoundment Basin, Z-4002 MR/LNG Impoundment
Basin, Z-4003 First Slush Sump and Z-4010 Observation Basin)
that were required for the project. During the estimating phase of
PROJECT SPOTLIGHT
Limited access sheet piles at the 4003 basin Installing the limited access H-piles at the 791 area
108 | EDITION 6 2019 www.piledrivers.org
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