基于模糊集重心理论的膨胀土胀缩等级评判

发布时间：2018-06-04 05:47

本文选题：模糊集重心理论 + 膨胀土　；参考：《公路工程》2014年06期

【摘要】：膨胀土及其对实际工程稳定性的影响问题有基础工程界的"癌症"之称。而准确评定膨胀土的等级进而有针对性的采取工程措施是治理膨胀土的关键,然而传统的膨胀土胀缩等级评判是采用模糊综合评判理论进行的,该方法易丢失评判信息,从而影响评判结果的科学性和可信度,基于此,首先通过引入模糊集重心理论来弥补传统模糊综合评判方法的不足,然后在此基础上选取五个对膨胀土胀缩等级评判影响较大的因素,并以正态分布作为其隶属函数,采用加权平均值法确定各因素权重值,建立起基于模糊集重心理论的膨胀土胀缩等级评判方法。最后以某市政道路一处膨胀土为例,阐述了基于模糊集重心理论的膨胀土胀缩等级评判的计算程序,并证明了此方法的合理性与有效性。
[Abstract]:The problem of expansive soil and its effect on the stability of actual engineering is known as "cancer" in the foundation engineering field. But it is the key to control expansive soil accurately by evaluating the grade of expansive soil and then taking engineering measures targeted. However, the traditional expansion and shrinkage grade evaluation of expansive soil is based on fuzzy comprehensive evaluation theory, and the method is easily lost. Information, therefore, affects the scientificity and credibility of the evaluation results. Based on this, first, the inadequacy of the traditional fuzzy comprehensive evaluation method is made up by introducing the theory of the center of gravity of fuzzy sets. On this basis, five factors which have great influence on the expansion and contraction evaluation of expansive soil are selected, and the normal distribution is used as its membership function, and the weighted average is adopted. The weight value of each factor is determined by the value method, and the evaluation method of expansion and shrinkage grade of expansive soil based on the theory of the center of gravity of fuzzy set is established. Finally, taking an expansive soil in a municipal road as an example, the calculation program of the evaluation of expansion and shrinkage grade of expansive soil based on the theory of fuzzy set center of gravity is expounded, and the rationality and validity of this method are proved.
【作者单位】：中国市政工程西北设计研究院有限公司;
【分类号】：U416.167

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