Research on Optimization of Complex Section Route Scheme of Mountainous Expressway Based on Multi-objective Decision Making Method

摘要

Complex section route scheme selection of mountainous expressway is the key to overall design of expressway. It not only determines the quality of expressway alignment, as well as the expressway construction cost control factors. According to the basic principles of expressway route selection, combining with the terrain and geological conditions of mountains, it analyses and establishes the optimization model of complex section route scheme selection of mountainous expressway based on multi-objective decision making method. The relative weight of indicators is determined by the method Analytic Hierarchy Process (AHP) and the pattern vectors to be tested and characteristic matrix of indicators are established based on Grey Correlation Degree Process (GRAP) and the correlation degree is calculated and the optimal route is determined according to the size of correlation degree. This method is validated by a case study of complex section route selection of mountainous expressway in Chinese. The practice proves that the method for complex section route selection of mountainous expressway is feasible.