Methods for testing marine piles
Integrity tests specifically look for the structural adequacy of
each foundation element tested such as cross-section, depth
and whether the reinforcement cage has sufficient cover.
For driven and helical piles, high-strain dynamic testing
is the most common test for new construction. A Pile
Driving Analyzer® (PDA) is used to measure force and velocity
waves within the pile during impact by a heavy hammer.
The hammer strikes the pile and the data from the sensors is
recorded and used by the analyst running the test to evaluate
structural integrity and geotechnical resistance in the field.
The dynamic tests are then interpreted in detail by engineers
who have the technical expertise. The test results can
be used to fine-tune and economize the pile design. During
construction for marine projects, the PDA checks the effect
of site variability on design assumptions and provides quality
assurance for the installed piles.
Blow counts and pile behaviour provide immediate feedback
during the construction of driven pile foundations that
is not available for drilled piles, which are often large and
each may replace 10 or more driven piles. Proper construction
is critical to the performance of drilled piles, and there
is a wider array of testing options. For instance, sonic or
mechanical calipers are often used to verify the shape of an
excavation prior to placing concrete.
The sonar caliper has become a preferred testing method
for quality control and quality assurance for deep foundations.
It uses a rotating sonar probe to give engineers the
ability to view the pile shape in a marine environment. The
Fraser River Pile & Dredge (GP) Inc.
As Canada’s largest Marine Construction, Land Foundations and Dredging contractor, FRPD is a recognized
leader that employs state of the art methods and equipment. FRPD’s versatile fleet is ready to complete all
scope and size Marine Construction, Environmental Remediation, Dredging and Land Foundation
projects. Established in 1911 as Fraser River Pile Driving Company and incorporated in 2008 as Fraser River
Pile & Dredge (GP) Inc., FRPD’s team of highly skilled professionals brings more than 100 years of experience
and commitment to exceeding expectations.
1830 River Drive, New Westminster, B.C. V3M 2A8
Phone: 604-522-7971 (24/7)
www.frpd.com info@frpd.com
COVER FEATURE
PHOTO COURTESY OF FUGRO
CONTINUED ON PAGE 36
A RIM-cell provides bi-directional loading for confirmation
of pile capacity and integrity for drilled piles
34 Q2 2020 www.pilingcanada.ca
/www.frpd.com
/www.pilingcanada.ca
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