城市道路立体交通枢纽设计探索──介绍4/4(4/3)车道地上双层无交叉立交桥设计

文章分析了当前道路正体交通枢纽设计的现状和制约城市道路立体交叉建设的一些关键因素，以及建设城市道路立交的迫切性。扼要介绍了4／4（4／3）车道地上双层无交叉立交桥的设计原理和方法，通过分析比较，认为该设计是适用于城市道路立体交叉设计的新方法，特别为老城市添置道路交叉的立交建设提供了有效途径。

This paper analyses the present situation of the dcsign of grade seperation pivot of teday's surban roads and sere key factors restricting the constructi on of urban overpasses and thc urgency of the constructi on of urban overpesses.And thi s poper briefly intreduces the design principles and methods of ground double-leve14/4(4/3) land overpass without intersections.Through analysis and cmpration,thispaper believes that this new designmethod is sui table for overpass design of urhan roads because of its littleoccgntiooof land, quick effectiveness, less investhent and complete function , andthat itespecially provides an effecti ve way for the overpassconstruction for which there isnoposition in origiral urbanplan.