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通过分析城市道路承担的功能以及道路横断面设计的影响因素,构建了包括交通需求、道路设计、环境及人性化要求及其子项目在内的横断面设计评价指标体系。基于模糊数学隶属度的基本原理,采用改进的层次分析法,建立了评价指标的相对隶属度矩阵,并根据隶属度矩阵构造各评价指标权重的判断矩阵,构建了城市道路横断面设计方案的模糊综合评判模型。通过工程实例的计算分析,对评价方法及评价模型进行了验证。结果表明,利用改进的层次分析法来构建的权重矩阵,可以减少主观因素对评价结果的影响,使得城市道路横断面设计方案的比选更具客观性和科学性。
By analyzing the functions assumed by urban roads and the factors affecting the design of cross-section of roads, a cross-sectional design evaluation index system including traffic demand, road design, environmental and human requirements and their subprojects is constructed. Based on the basic principle of membership degree of fuzzy maths, the analytic hierarchy process (AHP) is used to establish the relative membership matrix of evaluation index, and the judgment matrix of weight of each evaluation index is constructed according to the membership degree matrix. The fuzzy scheme of urban road cross-section design is constructed Comprehensive evaluation model. Through the calculation and analysis of engineering examples, the evaluation methods and evaluation models are verified. The results show that the weight matrix constructed by improved analytic hierarchy process can reduce the influence of subjective factors on the evaluation results and make the comparison and selection of urban road cross-section design more objective and scientific.