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Frequency of Observed Anomalies in Drilled Piles Integrity Tested by Thermal Methods
The structural integrity of concrete cast in place drilled foundations is often determined by cross hole sonic logging, low strain impact-echo, gamma-gamma logging, or thermal integrity methods. Studies have characterized the frequency of observed significant anomalies detected by the first three methods. This study reviews a large database of drilled foundations tested by thermal methods over the last seven years. The frequency and general location in the shaft of major anomalies, as characterized by a 6% effective radius reduction criteria, are summarized and reviewed. Based on these criteria, anomalies occur in approximately 15% of the 2104 shafts reported. Of those 318 drilled foundations with anomalies, 77 (28%) identified anomalies occur within a length equivalent to the bottom two diameters of the foundation element, a rate similar to that reported by studies using other integrity methods.
Frequency of Observed Anomalies in Drilled Piles Integrity Tested by Thermal Methods
The structural integrity of concrete cast in place drilled foundations is often determined by cross hole sonic logging, low strain impact-echo, gamma-gamma logging, or thermal integrity methods. Studies have characterized the frequency of observed significant anomalies detected by the first three methods. This study reviews a large database of drilled foundations tested by thermal methods over the last seven years. The frequency and general location in the shaft of major anomalies, as characterized by a 6% effective radius reduction criteria, are summarized and reviewed. Based on these criteria, anomalies occur in approximately 15% of the 2104 shafts reported. Of those 318 drilled foundations with anomalies, 77 (28%) identified anomalies occur within a length equivalent to the bottom two diameters of the foundation element, a rate similar to that reported by studies using other integrity methods.
Frequency of Observed Anomalies in Drilled Piles Integrity Tested by Thermal Methods
Robinson, Brent (author)
International Foundations Congress and Equipment Expo 2024 ; 2024 ; Dallas, Texas
IFCEE 2024 ; 86-93
2024-05-03
Conference paper
Electronic Resource
English
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