Frost Heave Performance of Shallow Foundations for Overhead Transmission Lines in Seasonally Frozen Alpine Regions
Publication: Journal of Cold Regions Engineering
Volume 37, Issue 3
Abstract
The Lanolin 750 kV electrical transmission line traverses more than 102.86 km through seasonally frozen regions, causing many engineering problems for transmission tower foundations. In this work, physical models of reinforced concrete independent foundations in soils with different frost heave grades were used to simulate the frost heaving performance in seasonally frozen alpine regions. The test results were used to evaluate the tangential frost heaving force calculated based on different specifications. The results showed that the tangential frost heaving force and frozen depth increased with the temperature decrease. Moderately frost-susceptible soils also increased the tangential frost heaving force and frozen depth. Based on technical standards, the main differences between the calculated and the test values were the variable load component and effective frozen depth coefficients. Correcting the coefficient values resulted in a closer agreement between the test and the calculation results.
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Acknowledgments
This research was supported by the National Natural Science Foundation of China (Grant Nos. 42101125 and 41772315), the Open Research Fund Program of the State Key Laboratory of Frozen Soil Engineering of China (Grant No. SKLFSE202015), and China Postdoctoral Science Foundation Project (2021M690840).
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Published In
Journal of Cold Regions Engineering
Volume 37 • Issue 3 • September 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Feb 17, 2022
Accepted: Jan 2, 2023
Published online: Apr 18, 2023
Published in print: Sep 1, 2023
Discussion open until: Sep 18, 2023
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