岩溶区高铁线路优选的模糊层次分析法

A Fuzzy AHP Approach to Selecting Express Railway Location in Karst Region

提出了岩溶区高速铁路线路优选的模糊层次分析法.在对影响岩溶区铁路线路方案的各因素进行分析和调查基础上,选取4个一级指标、13个二级指标构建综合评价指标体系;通过层次分析法建立层次关系,构造阶层结构,采用模糊理论建立判断矩阵,确定权重向量;通过专家调查和室内外试验等方式确定各因素得分,采用逻辑运算确定相对优属度矩阵,建立模糊综合评判模型,评判备选线路方案的优劣.利用该模型对贵广高速铁路雄村—贺州段3条备选线路方案进行比选,得出备选方案的相对优属度分别为0.131,0.889和0.581,从而确定第二方案最优,为实际工程建设提供了决策依据.

A fuzzy analytic hierarchy process（AHP）method was proposed to determine the rational express railway location in a karst region.Based on the analysis and investigation of factors affecting the express railway location in karst region,4 first grade indexes and 13 second grade indexes were conducted to establish the index system for synthesis evaluating project.The AHP method was used to construct the hierarchy relationship with the influence factors and to set up their hierarchy structures,and then the weight of every influence factors was computed based on the judge matrix fuzzy sets method.After all grades were acquired by means of geological investigations and laboratory or field tests,the matrix of the membership comparative degree was calculated by iterative logical arithmetic.A synthetic assessment model was made to estimate the express railway location.The comparative synthetic superior degrees for the location of Xiongcun—Hezhou section in Guizhou-Guangzhou express railway are 0.131,0.889 and 0.581 respectively according to this method,and the second location becomes best.The results show distinctly that the fuzzy-AHP method is valid and feasible to select the express rail location in karst regions.