EVENTS AND WEBINARS
PDCA Webinar Education Series
June 2021
June 1: Optimizing the Design of Driven
Pile Foundations with Instrumented
Static Load Tests
Peter Narsavage, P.E., Senior
Geotechnical Engineer, E.L. Robinson
Engineering
Two large bridges over the Great Miami
River in Dayton, Ohio, were recently
constructed. The foundations for these
bridges consist of driven piles, and the
foundation design was optimized for the
least cost given the constraints of the site
conditions and pile drivability. Over 40
different possible combinations of pile
diameter, pile wall thickness, pile capacity
and pile hammer were considered during
design, including open ended piles. Cost
factors included material costs for steel
and concrete including length surcharges
over 50 feet, crew and equipment time
and costs to unload and drive the piles,
and time and material costs for splices.
August 2021
Aug. 3: Vibration
Evaluation Study
Dr. Cathy Aimone-Martin, President,
Aimone-Martin Associates, LLC
October 2021
Oct. 5: Vibratory Hammers
& Pile Refusal
Gerald Verbeek, Technical Advisor CPT,
Eijkelkamp North America
December 2021
Dec. 7: Supplier/Manufacturer
Highlight – Open Format
t
Foundation costs were compared on
cost/ton basis. The selected pile design
was a 16-inch pipe pile with a nominal resistance
of 600 kips, which exceeded the
state DOT's standard maximum nominal
resistance of 450 kips for this size pile.
During construction, two instrumented
static load tests and many dynamic load
tests (PDA with CAPWAP) were performed
to evaluate the selected foundation design
and the results used to further refine
the foundation design.
The objective of the webinar:
• Efficient pile design must consider
the pile properties, the soil properties
and the pile driving equipment
• Foundation systems should be
compared based on cost per
capacity ($/ton)
• The results from instrumented static
load tests can be used to optimize
a pile foundation design
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38 | ISSUE 2 2021 www.piledrivers.org
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