Research On The Conditions Suitable For The Mountain Type And Mode Of Freeway Interchange

Freeway Interchange Design already have mature practices and experience in foreign and domestic, but the most are suitable for the conditions of plains, mountain interchange design pattern is fixed and flexibility is poor, especially in the types of interchange, there is interchange type single, large-scale, high cost, The lack of a reasonable location and qualitative such as improper. From the domestic point of view, at present, there is no interchange with the design of mountain technical guidance and specifications, especially in the selection on the interchange types, there is The design is not standardized, in the mountains interchange type selection, there are many key Sexual problems still need further study.This paper introduces the mountain highway interchange common types, And briefly describes the characteristics of the type commonly used interchange. For the Chongqing "2 Ring 8 shooting" highway interchange to conduct in-depth study and Detailed summary of the Chongqing "2 Ring 8 shooting," Highway 161 interchange type used and the type selected on the basis, as well as some mountainous areas to conduct field trips and special interchange observations, and conduct in-depth study, not only summed up in Chongqing Expressway interchange the type of features, but also summed up some of the interchange of problem.As the basis of Chongqing "2 Ring 8 shooting" highway interchange study, and through the induction promotion, raised the impact of mountain highway interchange type of subjective and objective conditions, and in the selection process factors, after repeated analysis argues that Proposed a set of mountain highway interchange type of system, for interchange type selection in mountains provide a basis.Combined Mountain Freeway interchange characteristics and analysis on the mountain highway interchange type selection of the subjective and objective conditions, established of a set of scientific and practical selection of the interchange system.Based on thestudy analytic hierarchy process, entropy method, fuzzy comprehensive evaluation method, analysis of their individual characteristics and conditions of application, and make examples of methods used to verify the effectiveness and practicality.