潮湿路基温度场、湿度场耦合作用计算模型

CALCULATION MODEL FOR COUPLING FUNCTION OF DAMP SUBGRADE TEMPERATURE FIELDS AND HUMIDITY FIELDS

在路基路面冻害调查资料和一些试验数据分析结果的基础上 ,利用建立在连续介质混合物理论基础上的饱和 /非饱和正冻土的水热迁移热力学模型 ,进行了路基路面结构体系的温度场、湿度场、应力场的耦合分析以及设计参数研究 ;根据傅里叶定律和达西水分传导定律导出了路基路面结构体系温度场与湿度场耦合作用的一维计算模型 ,将冻土区与未冻土区统一起来 ,利用显热容法处理了冻土复杂的相变问题 .本文的研究具有基础理论应用性研究的特点 。

According to the conditions of the subgrade frost_damage and some test data,the coupled analysis of the temperature fields,the humidity fields,the stress fields and the study of some design parameters are conducted utilizing the water_heat migration thermodynamic model of the saturated or unsaturated positive frozen soils founding the base of the continuous media mixture theory;Meanwhile this thesis deduces the one _dimensional calculation model of coupling function between the temperature fields and humidity fields of the subgrade and pavement structural system on the basis of the Fourier law and darcy law,and unites the frozen earth section and non_frozen earth section,so the problems of complex phase transformations can be solved by use of the sensible heat capacity method.The result has the quality of application research of basic theories,and good value in engineering practice.