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International Journal of Engineering Technology and Construction, 2021, 2(3); doi: 10.38007/IJETC.2021.020302.

The Effect of Environmental Temperature Change on Stress Distribution in Reservoir Ice

Author(s)

Yi Liang

Corresponding Author:
Yi Liang
Affiliation(s)

Hebei GEO University, Hebei, China

Abstract

In cold zones, cold and warm zones and high altitude areas, the surface fluidity decreases after the completion of the reservoir. When winter comes, the temperature decreases. Under natural conditions, part of the river reservoir area is not frozen or only bank ice may be covered by ice. The formation of ice layer hinders the heat exchange between cold atmosphere and reservoir water, and reduces the heat loss of water in winter. At this time, the water temperature of the reservoir is higher than that of the natural river, even higher than that of the ice-free reservoir. Water temperature is totally different from the hydrological and water temperature conditions of natural rivers and non-freezing reservoirs. At the same time, due to the formation of reservoir ice sheet, the reoxygenation process of the reservoir will be blocked. It may lead to the decline of reservoir water quality. Based on the above background, the purpose of this paper is to study the effect of environmental temperature changes on the stress distribution in ice reservoir. Therefore, firstly, the vertical variations of ice temperature along ice thickness and ice growth rate in different stages of ice growth are analyzed by using field data of reservoirs. Secondly, the numerical relationship between temperature and stress distribution in ice reservoir is established, and the effect of continuous temperature on ice stress is analyzed. A total of 140 groups of reservoir ice samples were tested at temperatures of - 2, - 5, - 10, - 15 and - 20 degree C. For the same temperature, the strain rate range is set to  , the loading direction is perpendicular to the growth direction of ice crystals, and the relationship between the stress distribution in ice and the simple model of environmental temperature change is determined.

Keywords

Ambient Temperature, Reservoir Ice, Internal Stress, Reoxygenation Process

Cite This Paper

Yi Liang. The Effect of Environmental Temperature Change on Stress Distribution in Reservoir Ice. International Journal of Engineering Technology and Construction (2021), Vol. 2, Issue 3: 14-29. https://doi.org/10.38007/IJETC.2021.020302.

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