SYMPOSIA PAPER Published: 29 July 2019
STP161120170198

Quality Control of Drilled Foundations for Base Cleanliness, Concrete Integrity, and Geometry

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One of the important factors that influences the performance of drilled foundations is the construction method and procedure. To ensure proper construction, a quality control process is applied during and after drilled foundation installation. Considering the construction process for each type of drilled foundation, the evaluation of the drilled hole prior to concrete or grout placing and cage lowering has to be performed using the appropriate testing method. In the case of augered-cast piles, the bottom of the hole cleanliness or the cross-section area evaluation is performed using different tools from those used in the case of drilled shafts. The current state of practice includes several quality control inspection devices and nondestructive test methods for assessing the quality and integrity of drilled shafts as well as augered-cast piles. Newly developed methods can quantitatively measure the shaft base cleanliness, cross-section area, and elevated concrete temperatures during the hydration process of cast-in-place concrete foundations. Collectively, results from these tests and devices can be interpreted to evaluate the overall quality control and integrity of drilled foundations. This paper introduces three main segments of the quality control of drilled foundations: base cleanliness, drilled foundation integrity, and drilled hole geometry. Primarily and for comparison purposes, for each one of the methods introduced in this manuscript, their equivalent or existing method used as the standard practice is presented and briefly discussed.

Author Information

Moghaddam, Rozbeh, B.
GRL Engineers, Inc., Solon, OH, US
Belardo, Daniel, S.
GRL Engineers, Inc., Solon, OH, US
Piscsalko, George
Pile Dynamics, Inc., Solon, OH, US
Likins, Garland
Pile Dynamics, Inc., Solon, OH, US
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Details
Developed by Committee: D18
Pages: 223–237
DOI: 10.1520/STP161120170198
ISBN-EB: 978-0-8031-7668-3
ISBN-13: 978-0-8031-7667-6