双交叉菱形立交平面线形设计关键指标探讨  

Discussion on Key Indicators of Dual-Crossing Diamond Interchange Horizontal Alignment Design

作　　者：卜鑫德 王玉杰 Bu Xin-de;Wang Yu-jie(Central&Southern China Municipal Engineering Design and Research Institute Co.,Ltd.,Wuhan 430010,Hubei Province,China)

机构地区：[1]中国市政工程中南设计研究总院有限公司,湖北武汉430010

出　　处：《科学与信息化》2024年第3期166-168,共3页Technology and Information

摘　　要：互通立交被广泛应用于公路桥梁车流量通行中,不同互通立交的适应环境差异性较大,菱形立交具备造价低、占地面积小的优点,在城市有限空间交通组织设计中占据重要地位。传统菱形立交往往难以适应不断扩大的交通需求,双交叉菱形立交的交通安全服务能力更好,左转车流量更大,关于双交叉菱形立交的平面线形设计要点得到了人们的重点关注。本文首先对双交叉菱形立交交织区关键设计参数进行分析,其次结合湖北某立交项目采取VISSIM软件进行双向四车道交织区长度的合理评估,研究结果表明,交织区长度控制在100~200m之间时,交叉口处数据采集点的延误值较低,立交服务评价水平相对较高。Interchanges are widely used in the traffic flow of highway bridges,and the adaptation environment of different interchanges is quite different.The diamond interchange has the advantages of low cost and small area,and occupies an important position in the organization and design of urban limited space transportation.The traditional diamond interchange is often difficult to adapt to the expanding traffic demand,while the dual-crossing diamond interchange has a better traffic safety service capacity,and larger left-turn traffic flow.The key points of dual-crossing diamond interchange horizontal alignment design has received people’s attention.In this paper,the key design parameters of the dual-crossing diamond interchange weaving area are analyzed,and then the VISSIM software is used to reasonably evaluate the length of the twoway four-lane weaving area in combination with an interchange project in Hubei.The study results show that,when the length of the weaving area is controlled between 100-200 m,the delay value of the data collection point at the intersection is low,and the interchange service evaluation level is relatively high.

关 键 词：双交叉 菱形立交 交织区 

分 类 号：U41[交通运输工程—道路与铁道工程]