摘要
为了研究碎石层保护冻土地区路基的效果,将碎石路基视为多孔介质,从多孔介质对流理论出发,用Bear J摄动法推导了自然对流的发生条件,总结和分析了冷却地基研究成果,就青藏地区的冻土和气候条件,讨论了碎石路基的铺设厚度和粒径,计算厚度为0.96米,并指出了所亟待解决的问题.
In order to study the effect of crushed rock maintaining permafrost embankment, here, the crushed rock embankment is treated as porous media. The discussion starts with the theory of the convection of porous media; and the formula for the nature convection is deduced by Bear J perturbation methal; and then based upon summarizing the research findings of the cooling mechanism of the crushed rock embankment, the thickness （0.96 m） and grain size for the crushed rock embankment is achieved according to the natural condition of Qinghai-Tibet Plateau; lastly, the urgent questions about this sort of embankment are showed.
出处
《西安工业大学学报》
CAS
2006年第6期587-590,共4页
Journal of Xi’an Technological University
关键词
碎石路基
永冻区
对流
多孔介质
热弥散
crushed rock embankment
permafrost
convection
porous media
thermal dispersion.
