基于物元理论的公路隧道衬砌结构技术状况评估模型

Evaluation Model of the Technical Condition of a Highway Tunnel Lining Structure Based on Matter-Element Theory

为了评估施工期高速公路隧道衬砌结构技术状况,文章运用层次分析法建立由目标层、因素层和指标层构成的递阶层次结构模型,分析影响隧道衬砌结构的各种不确定性因素;采用物元理论、模糊集合论和信息熵理论,构建熵权模糊物元评估模型。工程实例应用结果表明,交工前隧道结构技术状况为1A,衬砌破损程度等级为一般;衬砌裂缝和衬砌背后空洞是影响评估结果的最主要因素。研究认为:该评估方法考虑了指标因子的不确定性,将主观权重与客观权重相结合,避免了传统评判方法中的主观随意性,所得结果更加符合客观实际。

In order to evaluate the technical condition of an expressway tunnel lining structure, a reeursion ordel- hierarchical structure model-which consisted of a target level, factor level and index level-was proposed. Many une, ertainties affecting the tunnel lining structure were analyzed and an entropy-weight fuzzy matter-elemenl model was put torward based on matter-element theory, fuzzy sets and information entropy theory. Application to one expressway tunnel shows that before the tunnel was handed over the technical condition of the lining structure was at the 1A level, and the degree of damage was at an ordinary level. Additionally, concrete cracks and cavities behind the linings were the main factors affecting the evaluation. The uncertainties of evaluation indexes were considered and subjective weights and objective weights were combined in this method, which reduces the subjectivity of traditional evaluation and improves the objectivity of results.