路基膨胀土判别和分类的属性测度模型

Attribute measurement model for identification and classification of expansive soil in highway subgrade

将属性数学理论应用于膨胀土的综合评判中,建立路基膨胀土判别与分类的属性测度模型.首先根据《公路路基设计规范》对膨胀土的评判要求,结合高速公路路基膨胀土的判别与分类实践,提出用于膨胀土综合判别的评价指标.然后根据属性数学理论构造单指标属性测度函数,以属性测度函数计算单指标属性测度,以客观性权重对指标进行赋权以计算多指标综合属性测度,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.实例研究表明,该模型的评价结果与《公路路基设计规范》评判法、模糊综合评判法的评价结果基本一致.

Aiming at expansive soil judgment in expressway roadbed, the attribute measurement model based on attribute mathematics theory is developed. Firstly, according to the study results of relevant experts and scholars and the requirements to assess expansive soil, appraising indices for judging expansive soil are proposed; Secondly, attribute measurement functions are constructed to calculate attribute measurement of single index and synthetic attribute measurement that is used to recognize the expansibility of expansive soil; finally, the expansibility of expansive soil is recognized by the confidence criterion. In an example study, the recognition results based on objective weight meet the Specifications for Design of Highway Subgrades and are agreeable to those of fuzzy synthetic evaluation method.