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Impedance Logs for Drilled Shafts at the Northwestern NGES
The impulse response method is a nondestructive evaluation technique used to check the length and continuity of deep foundations. Uncertainty may exist when interpreting the results to quantify the size and location of the anomaly, if present. The analysis can be enhanced by developing a two-dimensional graphical image of the shaft using the impedance log technique. This paper describes the method used to develop impedance logs and shows results from drilled shafts at the Northwestern University National Geotechnical Experimentation Site. Two of the shafts were purposely constructed with anomalies representative of typical construction deficiencies. The ability to quantify the size and location of these anomalies using the impedance log technique is discussed.
Impedance Logs for Drilled Shafts at the Northwestern NGES
The impulse response method is a nondestructive evaluation technique used to check the length and continuity of deep foundations. Uncertainty may exist when interpreting the results to quantify the size and location of the anomaly, if present. The analysis can be enhanced by developing a two-dimensional graphical image of the shaft using the impedance log technique. This paper describes the method used to develop impedance logs and shows results from drilled shafts at the Northwestern University National Geotechnical Experimentation Site. Two of the shafts were purposely constructed with anomalies representative of typical construction deficiencies. The ability to quantify the size and location of these anomalies using the impedance log technique is discussed.
Impedance Logs for Drilled Shafts at the Northwestern NGES
Gassman, Sarah L. (author) / Li, Hongfen (author)
International Foundation Congress and Equipment Expo 2009 ; 2009 ; Orlando, Florida, United States
Contemporary Topics in Deep Foundations ; 583-590
2009-03-10
Conference paper
Electronic Resource
English
Impedance Logs for Drilled Shafts at the Northwestern NGES
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