Thermal Consolidation Theory
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Volume 147, Issue 1
Abstract
This study presents an analytical formulation to predict the generation and dissipation of thermal pore pressures and volumetric strains in low permeability soils. The developed relations facilitate mimicking the transient nature of the thermal loads applied to energy geostructures overcoming the commonly adopted assumptions of fully drained or undrained conditions. This theoretical model relies on coupling Darcy’s law with relations predicting the thermal volumetric strains in soils. The developed relations were validated against experimental results under different conditions (e.g., heating rates, confining stresses, and stress states), showing good agreement between the predicted and the experimental results. The developed relations were then used to explain why the maximum thermal pore pressures at the bottom of the tested specimens were observed before the specimen temperature reaches its maximum. Finally, a sensitivity analysis was performed to identify the significance of various parameters to the thermal consolidation process.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request.
Acknowledgments
This work is supported by the US Army Research Laboratory and the US Army Research Office under contract numbers W911NF-20-1-0238, W911NF-16-1-0336, W911NF-17-1-0262, and W911NF-18-1-0068. The discussions and conclusions in this work reflect the opinions of the authors only.
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Journal of Geotechnical and Geoenvironmental Engineering
Volume 147 • Issue 1 • January 2021
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© 2020 American Society of Civil Engineers.
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Received: Apr 17, 2019
Accepted: Aug 10, 2020
Published online: Oct 19, 2020
Published in print: Jan 1, 2021
Discussion open until: Mar 19, 2021
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