and piezometers in soil adjacent to the bridge monitoring all made
available on a “near real-time” basis using a dedicated website.
Proponent of pile driving
Often, GZA’s work demonstrates that pile driving is the superior
method for deep foundation construction. The Maritime
Aquarium in Norwalk, Conn., for example, was faced with a concern
of possible damage to the existing buildings from pile driving
vibrations and the effect of noise levels on the adjacent aquarium
marine life. A vibration level as low as 0.2 ips was being considered
for these original factory buildings that were remodeled into the
aquarium in the 1980s. Although no criterium was proposed for
noise, Marine Center employees constantly monitored the marine
wildlife during construction operations.
The aquarium project consisted of the construction of a 4D
movie theater and a large new seal exhibit. The project was
designed for micropiles. GZA’s client, Norwalk Marine Contractors,
Inc. (NMC), proposed a 1:1 replacement of the micropiles with
Grade 50, 10x42 H-piles at the locations not subjected to uplift and
without headroom limitations.
“GZA and NMC proposed a program with the goal of demonstrating
the conditions under which a driven H-pile can be safely
installed on this site,” said Jon Jagello, a senior project manager at
GZA who has overseen thousands of projects in his career. “The
goal of the program was to identify necessary measures to ensure
the work could be accomplished without damaging the existing
structures or disturbing the animals.”
To demonstrate driven piles would work, NMC performed a
test pile program consisting of two HP10x42 steel H-piles driven
AMERICAN SpiralWeld Pipe, with
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ENGINEERING AFFILIATE MEMBER
A new city dock in Old Harbor in Kodiak Island in Alaska was one of the
remotest projects that GZA’s team has ever worked on. On the project,
GZA worked with Pacific Pile & Marine to test 24-inch, 30-inch and
36-inch pipe piles.
The New York Bridge Project showcased GZA’s geotechnical
skillsets, from conducting and analyzing the preliminary borings,
to the design, monitoring and testing of the pile, to the monitoring
of existing structures of the adjacent active Tappan Zee Bridge
through a network of 16 automated theodolites with three GPS
base stations, vibration and tilt sensors of select bridge columns
Piling Pipe from AMERICAN
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EOE/Vets/Disabilities
DUCTILE IRON PIPE FLOW CONTROL INTERNATIONAL SPIRALWELD PIPE STEEL PIPE
Photo: GZA
60 | ISSUE 2 2020 www.piledrivers.org
/aswp
/www.piledrivers.org
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