Mechanism of evolution on winter-time natural convection cooling effect of fractured-rock embankment in permafrost regions
作者： Sun Binxiang , Xu Xuezu , Lai Yuanming , Wang Shuangjie , Zhang Jinzhao
DOI: 10.1007/BF02899645
关键词: Permeability (earth sciences) 、 Geology 、 Revetment 、 Berm 、 Geotechnical engineering 、 Thermal conduction 、 Natural convection 、 Levee 、 Convection 、 Permafrost
摘要: Mechanism and evolution of the pore-air natural convection cooling effect in fractured-rock embankments permafrost regions are studied using a numerical representation non-dimensional governing equations variable permeability porous media. The analyses show that winter-time begins to occur side slope portions gradually develops from left right middle portion embankment. more significant distortion isotherms their initial orientations due heat conduction alone is on embankment stronger. minimum critical Rayleigh numbers triggering were obtained. factors influence analyzed. Finally, assertion techniques revetment berm effective measures maintain stability roadbed theoretically demonstrated.
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