单喇叭式立交和A-B型半苜蓿叶式立交的通行能力比较  

Comparison of Capacity Between Trumpet Type Interchange and A-B Type Partial-cloverleaf Interchange

作　　者：曹岳嵩 伍建平[2] CAO Yuesong;WU Jianping(Hunan Communication & Water Conservancy Group Co. ,Ltd. , Changsha,Hunan 410008,China;Hunan Provincial Communication Planning,Survey & Design Institute Co. ,Ltd. , Changsha,Hunan 410200,China)

机构地区：[1]湖南省交通水利建设集团有限公司,湖南长沙410008 [2]湖南省交通规划勘察设计院,湖南长沙410200

出　　处：《公路工程》2021年第4期163-170,共8页Highway Engineering

基　　金：国家西部交通建设科技项目(200731800003);四川省交通科技项目(2006A24—561)。

摘　　要：为比较单喇叭及A-B型半苜蓿叶式立交的整体通行能力,采用可接受间隙模型计算相同交通量下两立交双向停车控制T型平交口次路左转车流的通行能力及服务水平,并采用交织区服务水平计算模型分析A-B型半苜蓿叶式立交设置的两平交口之间交织区服务水平。实例计算结果表明:在相同交通量下,由于A-B型半苜蓿叶式立交将转向交通流分摊至两个平交口,降低了平交口次路左转车流的冲突流率,其服务水平优于单喇叭式立交。在相同的主路交通流率及服务水平下,计算比较了两类立交的平交口次路可能通行能力,结果显示:A-B型半苜蓿叶式立交设置的平交口次路通行能力更高,互通的整体通行能力更高。In order to compare the capacity of trumpet type interchange and A-B type partial-cloverleaf interchange,Gap acceptance mode was used to analyze the level of service(LOS)of left-turn flow in their Two-way stop-controlled intersections.The LOS calculation mode of weaving section was also used to analyze the LOS of A type weaving section existing between the two intersections of A-B type partial-cloverleaf interchange.The calculation results of typical example shows that under same traffic condition,the LOS of A-B type partial-cloverleaf interchange is better than trumpet type interchange because the conflicting flow rate of minor road’s left turn flow is lower with the turning traffic flow were diverted to two intersections.Under the same major road’s flow rate and LOS standard,their minor roads’capacity of intersections were compared,the result show that A-B type partial-cloverleaf interchange’s intersection has higher capacity,its integrated capacity is lager than trumpet type interchange.

关 键 词：立交 双向停车控制交叉口 交织区 通行能力 可接受间隙模型 

分 类 号：U448.17[建筑科学—桥梁与隧道工程]