膨胀土判别的属性测度模型

Attribute Measurement Model for Expansive Soil Judgment

结合高速公路路基膨胀土的判别实践,提出了基于属性数学理论的膨胀土属性测度评判模型。首先根据《公路路基设计规范》对膨胀土评判要求以及有关专家学者的研究成果,提出用于膨胀土判别的评价指标,然后根据属性数学的基本理论构造属性测度函数,以属性测度函数计算单指标的属性测度和不考虑指标权重的综合属性测度,以该综合属性测度对膨胀土的膨胀等级进行判别,最后以置信度准则进行膨胀土胀缩等级的属性识别。研究中,以客观性权重和相似权分别对评价指标进行赋权,计算赋权后的评价指标的综合属性测度,从而对不考虑指标权重的综合属性测度评判模型进行对比和验证。结果表明,三者评价结果相同,且评价结果与《公路路基设计规范》评判法、模糊综合评判法的评价结果有较好的一致性。

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.