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Producing:
24"-192" OD
.312"-2.00" Wall
Lengths up to 80 ft.
Straight Seam-DSAW
20 ft. Lengths in Stock
800-821-3475 Fax 815-964-0045
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Your resource for the use of treated timber piles
Geotechnical Engineering
Soil and Rock Mechanics
Shoring and Underpinning Design
Pile Load Testing and Inspection
Vibration Monitoring
Construction Materials Testing
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70 Pleasant Hill Road, Mountainville, NY 10953
Tel: 800-829-6531 • www.tectonicengineering.com
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P.O. Box 600191, Jacksonville, FL 32260
Phone: (904) 631-8309
E-mail: van@spta.org
www.timberpilingcouncil.com
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FEATURE
Plastic piling at Iskander’s research site.
Also, with Olson, Iskander worked on comparing measured
and predicted pile capacities, and helped him formulate design
approaches and later improve the design parameters.
“Following my doctoral degree, I recognized the limitations of
existing knowledge, so I chose a career in academia,” said Iskander.
He went to Polytechnic University, which has since merged
with New York University (NYU), and has been there for 23 years.
His earlier research at Polytechnic focused on piling made from
recycled polymers, evaluating its durability, driveability, capacity,
creep and load testing, among other characteristics.
Today, Iskander is focused on visualizing soil behavior and
soil-structure interaction in a range of important applications. “We
do this in a number of ways; for example, you can drive a pile next
to a glass wall and track the motion of individual soil particles. But
mostly, we’ve been using synthetic soils made of transparent substances
that behave at the macroscopic level like natural soils. Snow
is white, but it’s made of water, which is transparent. But snow is
white because it’s full of air and air refracts light differently.
“If I am able to fill in between the particles with a liquid that
has the same refractive index, then I can see through the material,”
he said. “I can now study flow; I can show you how contaminants
travel in soils. For example, the effects of viscosity, velocity and gradient
on in situ remediation can be studied. I can also shine a laser
through a lens and make it a sheet of light. When the laser sheet
interacts with the soil, it produces a speckle pattern. You can see
and measure its displacements with a camera. Once you have the
displacements, you can compute local strains. These techniques
empower us to study the stress distribution around piles and other
structures. My students wrote an open source software called
MAGICgeo that allows interested researchers to achieve some of
these tasks. You can download MAGICgeo from our website.”
Iskander and his graduate students have also conducted
research for the U.S. Department of Defense, examining how
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