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http://dx.doi.org/10.12814/jkgss.2012.11.4.055

A Study of Correlation between SPT N-value and Exerted Electrical Energy Required for Ground Drilling II : Application Study (Field Pilot Test)  

Choi, Changho (Dept. of Geotechnical Engineering, Korea Institute of Construction Technology)
Publication Information
Journal of the Korean Geosynthetics Society / v.11, no.4, 2012 , pp. 55-62 More about this Journal
Abstract
In this application study, field pilot tests were performed to evaluate the validity of a proposed formula between the exerted electrical energy and SPT N-value based on the result of the basic study. Measurement sensors and recording system were developed to obtain exerted motor current and drilling depth in a field. By using the correlation formula proposed in the basic study, the measured motor current and boring speed were applied to predict SPT N-value and the predicted N-values were compared to SPT N-value of site exploration. From the comparisons it is verified that the exerted electrical energy to bore ground might be used to predict SPT N-value and pile tip location.
Keywords
Ground drilling; Electrical energy; SPT N-value; Field pilot tests; Pile tip location;
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