Taking seasonal temperature changes and pavement structure's blocking effect into consideration,a simplified one-dimensional finite model was developed to study the water transport law in subgrade soils.For this,numerically coupling analysis of Temperature and Seepage was performed through non-isothermal Richard method and non-isothermal multiphase flow method.The influence of initial soil temperature,initial soil water content were analyzed emphatically.The results show that water content in subgrade surface fluctuate with seasonal temperature change.The main influence depth is 0.5m.Water content fluctuation enhances with the rising of temperature gradient along depth and permeability coefficient of soils.Average water content changes was obviously effected by initial temperature,while water content fluctuation was less effected by initial soil temperature.The impact of initial soil water content on water content fluctuation was mainly concentrated on desorption stage.
water transportblocking effecttemperature cyclingsilty clay
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