Load Transfer Behavior of Full-Scale Instrumented Helical Piles
Kristen M Tappenden, Ehsan Abazari, David C Sego
In the proceedings of: GeoEdmonton 2018: 71st Canadian Geotechnical Conference; 13th joint with IAH-CNCSession: Soil Mechanics and Foundations (Deep Foundations II)
ABSTRACT: A field load testing program was undertaken to study the load transfer behavior of full-scale, instrumented helical piles installed in clay and sand soils. Five piles were fabricated of 219-mm-diameter hollow circular steel shafts each affixed with three 356-mm-diameter steel helices, spaced at 1.5 times the helix diameter. Each helical pile was instrumented with strain gauges at five locations along the inside wall of the pile shaft. Four of the five instrumented piles were installed to 5.0 m, with two tested in uplift and two in compression; the fifth pile was installed to 3.0 m and tested in uplift. Strain gauge readings collected during the axial load tests were used to characterize the stress transfer along the length of the test piles to the surrounding soil. The resulting load distribution curves for the five test piles are presented in this paper. The load distribution curves and ultimate axial capacities are compared to theoretical values calculated by the Cylindrical Shear and Individual Plate Bearing models, and discrepancies between the models and the measured distributions are discussed.
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Tappenden, Kristen M, Abazari, Ehsan, Sego, David C (2018) Load Transfer Behavior of Full-Scale Instrumented Helical Piles in GEO2018. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Tappenden_GEO2018_132,
author = {{Tappenden, Kristen M}, {Abazari, Ehsan}, {Sego, David C}}
title = {Load Transfer Behavior of Full-Scale Instrumented Helical Piles }
booktitle = {Proceedings of the 71st Canadian Geotechnical Conference; 13th joint with IAH-CNC }
year = {2018}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {Load Transfer Behavior of Full-Scale Instrumented Helical Piles }
booktitle = {Proceedings of the 71st Canadian Geotechnical Conference; 13th joint with IAH-CNC }
year = {2018}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }