Comprehensive Evaluation For Route Schemes Of Bi-Du Expressway

Expressway route selection is an important work in the early stage of construction.The selection of route scheme has great influence on the function of its function in the road network,the economic development and investment income of the region along the route.The selection and determination of route plan involves political,economic and environmental aspects.Because of the more complicated natural conditions such as topography and geology,the difficulty of line selection is further increased.This paper takes the expressway from Bi-Du of Guizhou province as the research object.Combined with the characteristics of expressway in mountainous area,the route selection technology is studied systematically.The main work and conclusions are as follows:(1)Through detailed investigation and investigation along the contract section of the Bi-Du expressway project,detailed investigation and analysis are made on the key sensitive spots along the project,such as national forest park,railway,mined-out area,coal enterprise,etc.,which lays a foundation for the preparation of follow-up route plan.(2)According to the actual situation of the project location and field geological investigation results,combined with the wiring principle and practical problems in the process of route in setting initial drafting multiple route scheme.Qualitative analysis was conducted from the aspects of technical difficulty,engineering economy and environmental sensitive points,and detailed conditions of each proposed route were analyzed and evaluated.Preliminary selection and comparison were made in the preset route scheme,and the recommended plan k line and valuable alternatives C7 and C8 were proposed.(3)Considering the influence of technology,economic benefit,environmental impact,geological condition and actual construction level on the choice of route scheme,fuzzy hierarchical analysis method is adopted to establish the optimal model of route scheme,and the selection of the final route scheme is compared scientifically.The application results show that the model method is simple and feasible,which can be used for reference to the choice of highway route scheme in this area.