Geomechanics and Engineering
Volume 38, Number 6, 2024, pages 593-601
DOI: 10.12989/gae.2024.38.6.593
Evaluation of durability performance for maintenance of tunnel structures due to repeated freezing and thawing
Jai-Wook An , Joon-Shik Moon , Hong-Kyoon Kim
Abstract
In this paper, the quantitative evaluation method is presented for the durability performance of mountain tunnel concrete linings experiencing freezing and thawing during winter season. To analyze the freeze-thaw characteristics of lining, the freezing time of the concrete lining was measured by the outside temperature. The heat flow analysis was conducted based on the freezing time measured through the indoor experiment, and based on this, the energy required to freeze the concrete lining by the temperature of the outside air could be analyzed. In addition, the temperature change during the winter season was measured through an instrument installed on the actual tunnel concrete lining, and based on the results of indoor and field experiments, criteria for freeze-thaw environment evaluation and progress evaluation were prepared. Also, an equation using the freezing index was proposed through regression analysis.
Key Words
criteria development; durability performance; freeze-thaw characteristics; Heat flow analysis; quantitative evaluation method
Address
- Jai-Wook An — Environmental Social Governance Section, KALIS, Gyeongsangnamdo 52856, Korea Joon-Shik Moo: Department of Civil Engineering, Kyungpook national university 80, Daehak-ro, Buk-gu, Daegu, Republic of Korea
- Hong-Kyoon Kim — 3Department of Ground Safety, KALIS, Gyeongsangnamdo 52852, Korea
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