FROST HEAVE BEHAVIOR OF UNSATURATED SOILS UNDER LOW OVERBURDEN PRESSURE AND ITS ESTIMATION
Tatsuya Ishikawa, Tetsuya Tokoro, Satoshi Akagawa
In the proceedings of: GeoQuébec 2015: 68th Canadian Geotechnical Conference & 7th Canadian Permafrost ConferenceSession: Laboratory Testing in Cold Regions / Essais en laboratoire en ingénierie nordique
ABSTRACT: This study proposes two kinds of estimation methods for the frost heave ratio of unsaturated frost-susceptible soils under low overburden pressure such as subgrade soils at the pavement structure in cold regions. One is the modified Takashi’s equation in contemplation of matric suction of soils under low overburden pressure. The other is the simple frost heave model which evaluates the effects of initial water content, Bishop’s effective stress and water absorption during freezing on the frost heave ratio. In addition, the applicability and the usefulness of both methods were discussed based on the results of frost susceptibility tests. As the results, it was revealed that the estimation methods proposed in this study have an excellent applicability to the precise prediction for the frost-heave phenomenon of unsaturated subsurface ground in cold regions.
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Ishikawa, Tatsuya, Tokoro, Tetsuya, Akagawa, Satoshi (2015) FROST HEAVE BEHAVIOR OF UNSATURATED SOILS UNDER LOW OVERBURDEN PRESSURE AND ITS ESTIMATION in GEO2015. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Ishikawa_GEO2015_792,
author = {{Ishikawa, Tatsuya}, {Tokoro, Tetsuya}, {Akagawa, Satoshi}}
title = {FROST HEAVE BEHAVIOR OF UNSATURATED SOILS UNDER LOW OVERBURDEN PRESSURE AND ITS ESTIMATION}
booktitle = {Proceedings of the 68th Canadian Geotechnical Conference & 7th Canadian Permafrost Conference}
year = {2015}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {FROST HEAVE BEHAVIOR OF UNSATURATED SOILS UNDER LOW OVERBURDEN PRESSURE AND ITS ESTIMATION}
booktitle = {Proceedings of the 68th Canadian Geotechnical Conference & 7th Canadian Permafrost Conference}
year = {2015}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }