一种无交织的环形立交的概念设计  

Conceptual Design of a Non-waving Rotary Interchange

作　　者：张谦[1] 王京元[1] 

机构地区：[1]深圳大学土木工程学院,广东深圳518060

出　　处：《公路交通科技》2012年第6期122-126,143,共6页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(50908150);深圳市基础研究计划项目(JC201005280483A)

摘　　要：以消除环道交织和改善行人通行的便利性为出发点,提出了一种无交织环形立交的设计概念;对现行环形立交进行了改进:(1)改变出入环左转匝道的接入方式和接入位置,将出入环匝道分置于环道的内外两侧,使车辆出入环方式由外进外出变为内进外出或外进内出,即由同侧进出变为异侧进出;(2)将右转匝道架空。据此设计了无交织环形立交的构型,实现了车辆在环道的无交织运行和行人在地面的全互通。基于无交织环形立交的交通组织方法,运用交通流线分析技术,重点研究了车辆左转和掉头的运行过程及行驶路径。结果表明:无交织环形立交为现代立交规划选型提供了一种新选择,可用于左转交通量和行人过街需求较大的交叉口,并可根据实际情况对立交的层次和构型加以改变。To eliminate the weaving within circular road section and improve the convenience of pedestrians, the design concept of a non-waving rotary interchange was proposed. Two improvements to the current rotary interchange were carried out. The access patterns and locations of enter and exit left-turn ramps were changed. The entry and exit ramps were located at the inside and outside of the circular road so that the entry and exit pattern was changed from the outside entry and outside exit to inside entry and outside exit or outside entry and inside exit, i. e. , from the ipsilateral entry/exit to opposite entry/exit. Another change is elevation of right-turn ramps. On this basis, the configuration of non-waving rotary interchange was designed so that vehicles can run with non-waving in the circular road and pedestrians can walk in all directions on the ground. Based on the traffic organization of the proposed interchange, the driving processes and driving paths of the left-turn and U-turn vehicles were studied using the traffic stream line analysis techniques. The result shows that this new rotary interchange provided a choice for the modern interchange plan, it is applicable to the intersections with heavy traffic demand of left-turn vehicles and crossing pedestrians, and the layers and configuration of the interchange can be changed according to the actual situation.

关 键 词：交通工程 无交织环形立交 构型设计 立体交叉 交通组织 

分 类 号：U412.352.1[交通运输工程—道路与铁道工程]