基于可变模糊集理论的公路隧道衬砌结构健康状况评价方法

发布时间：2018-03-28 01:10

本文选题：公路隧道　切入点：衬砌结构　出处：《长安大学》2015年硕士论文

【摘要】：鉴于目前公路隧道健康评价在指标权重确定、评价理论等方面存在的不足,论文对评价指标体系、指标判定标准及其无量纲化、指标权重的确定方法、隧道衬砌结构健康评价理论进行了深入研究。主要研究内容如下:1通过对六河高速和宜河高速公路隧道现场检测数据的统计分析,掌握了衬砌裂缝、渗漏水、衬砌厚度、衬砌背后空洞的分布情况,并分析其成因。2根据评价指标的选取原则,详细分析了公路隧道衬砌结构破损形态及其健康影响因素,确定了衬砌结构健康评价指标,建立了公路隧道衬砌结构健康状况评价指标体系。3分析国内外现有隧道健康等级划分方法,结合我国隧道工程的特点,将公路隧道衬砌结构健康等级划分为五级。在已有研究成果的基础上,给出了各评价指标的判定标准,并建立了指标的无量纲化公式。4为克服层次分析法的不足及反映各专家的评判水平,利用模糊层次分析法和熵值理论综合确定指标权重,提高了权重系数的精度。5分析现有评价方法的优缺点,提出了基于可变模糊集理论的公路隧道衬砌结构健康状况评价方法。研究结果表明,可变模糊综合评价模型在公路隧道衬砌结构健康评价中具有较好的适用性,利用模型的可变性对级别特征值的稳定性进行分析,最终综合不同模型的评价结果以确定衬砌结构健康等级,提高了评价结果的可靠性。
[Abstract]:In view of the shortcomings of the current highway tunnel health evaluation in the determination of index weight and evaluation theory, the paper gives an analysis of the evaluation index system, criteria and dimensionless criteria, and the method of determining index weight. The health evaluation theory of tunnel lining structure is studied in depth. The main contents of the study are as follows: 1 through the statistical analysis of the field detection data of Liuhe Expressway and Yihe Expressway Tunnel, the lining cracks, leakage water, lining thickness have been mastered. The distribution of the cavity behind the lining is analyzed. 2. According to the selection principle of the evaluation index, the damaged form of the lining structure of highway tunnel and its health influencing factors are analyzed in detail, and the health evaluation index of the lining structure is determined. The evaluation index system of health status of highway tunnel lining structure is established. 3. Analysis of existing methods of tunnel health classification at home and abroad, combined with the characteristics of tunnel engineering in China. The health grade of highway tunnel lining structure is divided into five grades. On the basis of the existing research results, the evaluation criteria of each evaluation index are given. In order to overcome the deficiency of AHP and reflect the evaluation level of experts, the index weight is determined by fuzzy analytic hierarchy process (FAHP) and entropy theory. The accuracy of weight coefficient is improved and the advantages and disadvantages of existing evaluation methods are analyzed. Based on the theory of variable fuzzy set, a method for evaluating the health status of highway tunnel lining structure is proposed. The results show that, The variable fuzzy comprehensive evaluation model has good applicability in the health evaluation of highway tunnel lining structure. The stability of the class eigenvalue is analyzed by using the variability of the model. Finally, the evaluation results of different models are synthesized to determine the health grade of lining structure, and the reliability of the evaluation results is improved.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U451.4;U457

【参考文献】