Impact of Ground Warming on Pile-Soil Interface Strength in Ice-Poor Frozen Soils
AA Aldaeef, MT Rayhani
Dans les comptes rendus d’articles de la conférence: GeoEdmonton 2018: 71st Canadian Geotechnical Conference; 13th joint with IAH-CNCSession: Cold Regions and Permafrost Geotechnics I
ABSTRACT: A surface roughness factor “m” has been used to represent the ratio between pile-soil adfreeze strength and cohesion strength of frozen soils. This factor is usually considered constant for a certain pile material but independent of soil type (i.e., ice-rich or ice-poor) and ground temperature. The current study summarizes results from an experimental program dedicated to evaluate the roughness factor “m” at different temperature exposures for steel piles in ice-poor frozen soils. The investigation was conducted in a walk-in environmental chamber using conventional and modified direct shear apparatuses. The results showed a significant reduction in shear strength of frozen soils as well as the pile-soil interface strength as the exposure surface temperature increased from -10℃ to -1℃. The roughness factor “m” varied slightly with temperature recording 0.7 at -10℃ and 0.75 at -1℃. A frictional factor was also introduced to represent the contribution of frictional resistance at the pile-soil interface based on friction angle of ice-poor frozen soils.
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Aldaeef, AA, Rayhani, MT (2018) Impact of Ground Warming on Pile-Soil Interface Strength in Ice-Poor Frozen Soils in GEO2018. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Aldaeef_GEO2018_476,
author = {{Aldaeef, AA}, {Rayhani, MT}}
title = {Impact of Ground Warming on Pile-Soil Interface Strength in Ice-Poor Frozen Soils }
booktitle = {Proceedings of the 71st Canadian Geotechnical Conference; 13th joint with IAH-CNC }
year = {2018}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {Impact of Ground Warming on Pile-Soil Interface Strength in Ice-Poor Frozen Soils }
booktitle = {Proceedings of the 71st Canadian Geotechnical Conference; 13th joint with IAH-CNC }
year = {2018}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }