无收费站双喇叭立交交织段长度分析  

Analysis on the Length of the Weaving Section of a Toll Free Double-trumpet Interchange

作　　者：刘建平 苗建伟 Liu Jianping;Miao Jianwei(Shandong Highway Design Consulting Co.,Ltd.,Jinan 150040,China)

机构地区：[1]山东省公路设计咨询有限公司,济南市150040

出　　处：《北方交通》2023年第8期48-52,共5页Northern Communications

摘　　要：双喇叭形立交占地面积少,桥梁规模小,工程规模较小,在小交通量十字交叉高速互通立交选型中有明显优势。区别于有收费站立交,无收费站双喇叭立交交通流均为连续流,交织段长度取值没有明确参考依据。针对无收费站双喇叭立交交织段长度取值问题,以2007版及2017版《公路通行能力手册》为计算依据,利用交织区通行能力计算方法对净交织长度进行了反算。以饱和度和交织区车流密度作为控制指标,得出结论:交织区匝道自由流速度在40~60km/h时,在满足四级服务水平最大负荷交通总流量前提下,推荐最小交织段长度为140~200m。The double-trumpet interchange is with small floor area,small bridge scale,and small engineering scale,which has a significant advantage in the model selection of interchanges at small traffic volume intersections.Compared with the toll station interchange,the traffic flow of the toll free double-trumpet interchange is continuous,and there is no clear reference frame for the length of the weaving section.In response to the issue of determining the length of the weaving section of a toll free double-trumpet interchange,the net weaving length is calculated reversely by using the calculation method for the traffic capacity in the weaving zone based on the 2007 and 2017 editions of the Highway Capacity Handbook.Taking the saturation and traffic flow density in the weaving zone as control indicators,it is concluded that:when the free stream speed of the ramp of the weaving zone is 40~60km/h,the minimum length of the weaving section is recommended to be 140~200m under the premise of meeting the total traffic flow with the maximum load of the fourth level of service.

关 键 词：双喇叭立交 交织区 非交织速度 通行能力 

分 类 号：U412.35[交通运输工程—道路与铁道工程]