Experimental Study of the Space–Time Effect of a Double-Pipe Frozen Curtain Formation with Different Groundwater Velocities

Shicheng Sun, Chuanxin Rong, Hua Cheng, Bin Wang, Xiaogang Jiang, Wei Zhang and Yunusa Halliru
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Shicheng Sun: State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mine, Huainan 232001, China
Chuanxin Rong: School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China
Hua Cheng: School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China
Bin Wang: School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China
Xiaogang Jiang: School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China
Wei Zhang: School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China
Yunusa Halliru: School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China

Energies, 2021, vol. 14, issue 13, 1-17

Abstract: Groundwater velocity has significant effects on the formation of a frozen curtain during freezing. In order to study the influence of the velocity on a frozen curtain, a large physical model test platform was established for double-pipe freezing. Based on this platform, freezing tests for different velocities were carried out. Quartz sand was selected as a similar material. The freezing temperature of the saturated sand layer was found by analyzing the results of the nuclear magnetic resonance (NMR). Based on the study of the thermal physical properties of the sand layer, the freezing test results were analyzed, and the results showed that the flow led to the differential development of the temperature between the upstream and downstream sections of the freezing pipes. Moreover, the larger the velocity, the greater the difference. The flow prolonged the overlapping time of the frozen curtains. Additionally, the flow slowed down the development of the frozen curtain area and the frozen curtain thickness. The larger the flow velocity, the greater the inhibition of the flow on the development of the frozen curtain. The test results can provide more references for the design and construction of freezing engineering with flowing groundwater.

Keywords: hydrothermal coupling; groundwater velocity; model test; temperature field; frozen curtain (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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