基于PDV模型对一维“锅盖效应”气态水迁移的研究

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

“锅盖效应”是一种重要的土中水汽迁移现象,常发生于季节性冻土区域,带来许多工程病害的发生。在目前“锅盖效应”试验与理论的研究、非饱和土体水汽迁移模型的基础上,考虑多种影响因素,基于PDV模型提出并推导了一维“锅盖效应”气态水迁移方程,用于描述或预测“锅盖效应”现象,并分析了温度与饱和度对“锅盖效应”迁移通量的影响。

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.