膨胀土判别与分类的模糊概率模型及应用

Fuzzy Probability Model of Identification and Classification of Expansive Soil and Its Application

以模糊概率理论为基础,选取反映膨胀土基本特性的标准吸湿含水率、塑性指数、自由膨胀率、液限及小于0.002 mm胶粒含量为主要判别指标,建立了膨胀土胀缩等级分类的模糊概率模型。结合合肥—六安—叶集高速公路工程,利用模糊概率模型对其典型膨胀土进行了分类验证分析,其结果与实际膨胀潜势相当吻合。同时,对广西依托工程和全国其他地区的典型膨胀土进行了分析。结果表明,模糊概率模型具有很高的可靠性和广泛的适用性,在膨胀土判别与分类中有较好的应用前景。

Based on the fuzzy probability theory,a new classification model of expansive soil was proposed.Some basic physical indices of expansion soil,such as standard absorption moisture,plasticity index,free swelling ratio,liquid limit and the content of colloidal particle less than 0.002 mm,were chosen as the main evaluating factors in the model.The classification of representative samples of expansive soil in Hefei-Lu＇an-Yeji Expressway project was verified using this model.The analytical result agrees well with the practical records.Furthermore,the classification of samples of expansive soil in Guangxi Province and samples of expansive soil in Chinese other regions were also carried out by the proposed method.The results indicate that the fuzzy probability model of identification and classification of expansive soil performs excellently with high reliability and wide applicability and has good prospect in practical engineering.