A Calculation Method for Vapor Migration in the Earth's Surface of “the Pot Cover Effect”

QU Xiao; YAO Yangping; LUO Xiaoying; CHEN Dong

doi:10.13204/j.gyjzG21040602

Volume 52 Issue 5

Jul. 2022

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QU Xiao, YAO Yangping, LUO Xiaoying, CHEN Dong. A Calculation Method for Vapor Migration in the Earth's Surface of “the Pot Cover Effect”[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(5): 194-198. doi: 10.13204/j.gyjzG21040602

Citation:

QU Xiao, YAO Yangping, LUO Xiaoying, CHEN Dong. A Calculation Method for Vapor Migration in the Earth's Surface of “the Pot Cover Effect”[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(5): 194-198. doi: 10.13204/j.gyjzG21040602

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A Calculation Method for Vapor Migration in the Earth's Surface of “the Pot Cover Effect”

doi: 10.13204/j.gyjzG21040602

1. Zhengzhou University of Aeronautics, Zhengzhou 450046, China;
2. Beihang University, Beijing 100191, China;
3. China Academy of Building Research, Beijing 100013, China;
4. Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088, China

Received Date: 2021-04-06
Available Online: 2022-07-23
Publish Date: 2022-07-23

Abstract

Abstract

Pot cover effect refers to the phenomenon that moisture accumulates underneath an airproof cover in the earth's surface. "Pot cover effect" may lead to a high moisture content in soil under the cover and induce engineering disasters. At present, numerical simulations of multi-field coupling are mostly used in the calculation for vapor migration, the processes of calculations are tedious and inconvenient. Accordingto the actual engineering conditions, the calculation formula for temperature at different depth was deduced. Based on the Fick’s law, the formula for calculating the amount of vapor migration was inferred. By combining the above formulas, a simple calculation method of vapor migration on "pot cover effect" was proposed. The calculated values were compared with the measured values. The results showed that the calculation method could reflect the trend of vapor migration in the earth at different depths. The calculation method was effective and feasible.
- pot cover effect,
- vapor,
- moisture content,
- fick's law

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References(22)

References

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