关键词: 模糊层次分析法, 膨胀土, 冻胀性评价

Abstract: The assessment accuracy on the frost heave of expansive soil not only affects the normal operation of project, but also is an important guarantee for project safety. In this paper, the evaluation method of frost heave of expansive soil is studied. Fuzzy analytic hierarchy process (AHP) is used to establish the evaluation model. Five assessment factors, such as particle grading index, physical property index, expansive index, frost heave index and et al., are selected and evaluated quantitatively. The evaluation results are in agreement with facts. It is proved that the fuzzy AHP is feasible and accurate for evaluating frost heave of expansive soil.

Key words: AHP and fuzzy evaluation theory, expansive soil, frost heave