Attribute Measurement Model for Expansive Soil Judgment

Aiming at expansive soil judgment in expressway roadbed, the attribute measurement model based on attribute mathematics theory was developed. Firstly, according to study results of relevant experts and scholars and requirements to assess expansive soil, appraising indices for judging expansive soil were proposed. Secondly, attribute measurement functions were constructed to calculate attribute measurement of single index and synthetic attribute measurement to recognize the expansibility of expansive soil. Finally, the expansibility of expansive soil was recognized by the confidence criterion.In example study, the evaluation results based on objective weight and similar weight respectively are identical compared with that of the attribute measurement model, which verified the feasibility and reliability of the proposed model. Moreover, the study indicates that the assessment result by attribute measurement model meets with the need of the Specifications for Design of Highway Subgrades and is coherent to that of fuzzy synthetic evaluation method.