Abstract:One of the difficulties in the design of mountainous highways is the design of interchange nodes. Currently, most interchange design schemes in mountainous areas adopt qualitative analysis methods, which leads to a significant impact of human factors on the decision-making of interchange schemes. Taking the interchange node scheme of a mountainous expressway as an example, based on the construction conditions, social conditions, natural conditions, and engineering reality of the project, the first in, last out full interchange scheme, left in full interchange scheme, and optimized semi interchange scheme were proposed. Qualitative analysis was conducted on each scheme, and the optimal scheme was obtained through comparison. At the same time, a comprehensive evaluation index system based on radar chart analysis method was constructed to quantitatively analyze and evaluate each scheme, obtain quantitative evaluation characteristic values, and use the results of quantitative analysis to verify the accuracy of the optimal scheme obtained by qualitative analysis, providing a basis for the comparison and decision-making of design schemes for mountainous interchanges.
