Abstract
Thaw settlement property of seasonal frozen earth has great effect to buildings; the grading of thaw settlement can accurately reflect the thaw settlement grades of frozen earth and judge the thaw settlement character of the frozen earth. Taking silty clay and sand of Changchun Area as research object, the article conducts experimental research to moisture content, dry density, plasticity index and initial temperature of freezing; the article adopts principal component analysis method to conduct analysis to the experiment and gets the weighing of all influence factors to thaw settlement property, ie., by calculating the comprehensive scores of all influence factors, we get its incidence to thaw settlement. The result shows that: the primary and secondary relations that affect thaw settlement property factor of silty clay are: moisture content>initial temperature of freezing>plasticity index>dry density; the primary and secondary relations that affect thaw settlement property factor of sand are: moisture content>initial temperature of freezing>silt content>dry density;the comprehensive score ranking got by principal component analysis method can reflect the ranking of thaw settlement property grading to some extent, which provides theoretical foundation for the further deepening of recognition for thaw settlement property.
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