Abstract: Choice of interchange type which is an important task of interchange design decides synthetical function and utilizing efficiency of interchange. First this paper analyses the characteristics of mountainous city and expounds the demands and principle, then sets forth some rules which choose interchange type, at last gives steps to choose interchange type, in order to supply information for designers to design interchange type.

Key words: interchange type of mountainous city, steps and principle of type choice, some rules of type choice

摘要： 互通式立交的方案选型是立交设计最重要的工作, 它直接决定立交的综合功能及运营效率. 本文首先分析了山区城市立交的特点, 阐述了山区立交方案选型的一般要求和原则, 然后给出了选择立交基本形式的几个法则, 最后提出了方案选型的一般步骤, 目的是为设计人员进行立交方案设计提供参考.

关键词: 山区立交型式, 选型原则和步骤, 几个法则