Major voids
Similar to cracks, voids can affect the consistency and quality
of pile materials. Voids can affect the load bearing capacity
of concrete piles as they reduce the effective cross-sectional
dimension. Pile integrity testing does not provide any useful
information about the portion of the pile that locates under-neath
the major voids or cracks.
Soil inclusion
During pouring of a drilled borehole, the hole walls slide into
the hole and cause gaps over the length of pile. It is obvi-ous
there is acoustic impedance between soil and hardened
concrete, but the difference is not as high as concrete and
empty space. So, it is not easy to distinguish acoustic waves
reflected off soil intrusion from a pile toe.
Necking
Necking in concrete piles can happen during the casting of
a pile shaft in soft clay. This rapid change of cross section (as
a result of necking) can be a source of an integrity problem.
Necking can affect the load bearing capacity of concrete piles.
Bulging
While bulging may increase pile ultimate load, it is still
considered as a pile defect and should be investigated. Pile
integrity testing can effectively help identify bulging and
necking in concrete piles.
FPRIMEC IS THE OWNER OF THE PHOTO, TAKEN AND PREPARED BY FPRIMEC TEAM
TECHNICAL
Applications of pile integrity testing
Engineering analysis of pile integrity test results can reveal
very useful information regarding geometry of piles and exist-ing
defects and deficiencies. The following briefly describes
MIG0332C
applications of pile integrity testing:
• Evaluate unknown length of piles or elements
• Evaluate consistency of pile material
• Determine the integrity and continuity of piles
• Evaluate pile cross-sectional area and length
• Determine pile shape as a function of depth
Monitoring Instruments Monitor
for Piling Projects & Deep Foundations
RST Instruments Ltd. is a world leader in the
design, manufacturing and sale of innovative
monitoring instruments for piling projects and
deep foundations. Since 1977, our customers
have relied on our reliability & accuracy to
help them make sound decisions to:
The RST Instruments Ltd.
Quality Management System
is certified ISO 9001:2015
The Permeation Grout Monitor System is a
low-cost & non-invasive method that provides
operators and engineers a “near-real-time” display
and recording of key grouting parameters to
enhance the understanding of site conditions.
CANADA & USA: SALES + SERVICE + MANUFACTURING | 604 540 1100 | sales@rstinstruments.com | TOLL FREE: 1-800-665-5599
EUROPE / MIDDLE EAST / AFRICA: SALES | +44 1449 613677 | gtaylor@rstinstruments.com
www.linkedin.com/company/rst-instruments-ltd- www.youtube.com/user/RSTgeotechnical
www.rstinstruments.com
MANAGE RISKS
IMPROVE SAFETY
OPTIMIZE DESIGN
REDUCE COSTS
INCREASE PRODUCTIVITY
MORE INFO www.rstinstruments.com/Permeation-Grout-Monitor.html
RST Instruments Ltd., 11545 Kingston St., Maple Ridge, BC Canada V2X 0Z5
with
Confidence
PILING CANADA 59
/rst-instruments-ltd-
/RSTgeotechnical
/www.rstinstruments.com
/Permeation-Grout-Monitor.html
link
link
/rst-instruments-ltd-
/RSTgeotechnical
/www.rstinstruments.com
/Permeation-Grout-Monitor.html
link
link
