One-dimensional "pot cover effect" for migration of gaseous water based on PDV model

TANG Guo-hang; WANG Nai-dong; YAO Yang-ping

doi:10.11779/CJGE2022S2036

Volume 44 Issue S2

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Chinese Journal of Geotechnical Engineering > 2022 > 44(S2): 164-168. > DOI: 10.11779/CJGE2022S2036

TANG Guo-hang, WANG Nai-dong, YAO Yang-ping. One-dimensional "pot cover effect" for migration of gaseous water based on PDV model[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S2): 164-168. DOI: 10.11779/CJGE2022S2036

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One-dimensional "pot cover effect" for migration of gaseous water based on PDV model

1.
Department of Civil Engineering, Beihang University, Beijing 100191, China
2.
Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China

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Received Date: December 05, 2022
Available Online: March 26, 2023

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Abstract

Abstract

The "pot cover effect" is an important phenomenon of water vapor migration in soils, which often occurs in the seasonal permafrost regions and causes many engineering diseases. Based on the current "pot cover effect" experiments and theoretical studies and unsaturated models for migration of soil moisture, considering the multiple influence factors, a one-dimensional "pot cover effect" gaseous water transport equation is proposed by using the PDV model. It is used to describe or predict the "pot cover effect" phenomenon, and the influences of the temperature and degree of saturation of soils on the "pot cover effect" of migration flux are investigated.
- pot cover effect,
- water vapor migration,
- migration flux,
- concentration gradient

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