交通量配置下三车道出口枢纽互通改扩建设计  

Renovation and Expansion Design of Three-Lane Exit Hub Interconnection Under Traffic Volume Configuration

作　　者：杨水生 黄沙路 YANG Shuisheng;HUANG Shalu(Jiangxi Highway Research and Design Institute Co.Ltd.,Nanchang 330002,China)

机构地区：[1]江西省公路科研设计院有限公司,南昌330002

出　　处：《交通工程》2023年第5期43-50,59,共9页Journal of Transportation Engineering

基　　金：江西省交通运输厅科技项目(项目编号:2022H0030).

摘　　要：枢纽互通是高速公路的重要节点,决定着高速公路能否发挥快速转换功能.本文基于樟树枢纽收集和恢复的基础性技术资料,从枢纽现状技术指标的要素评价、事故黑点分析、交通量预测等方面着手,梳理枢纽存在的主要问题,论证枢纽改造的必要性.分别将单向双车道匝道设计成单向三车道主线和单向三车道匝道,分析两种设计方式在交通量配置、平纵横指标、变速车道及渐变段长度等在取值方面存在的差异,并结合方案对比、分流区通行能力分析阐述两种设计方式的优缺点,并得出采用三车道主线出口更合适的结论.结合仿真分析进行安全性评价,结果表明:采用三车道主线出口进行设计在规范无相关规定的情况下是可行的.The hub interchange is an important node of expressway,which determines whether the expressway can play a fast conversion function.Based on the basic technical data collected and recovered by the Zhangshu hub,this paper reviews the main problems existing in the hub and demonstrates the necessity of hub reconstruction from the aspects of element evaluation of the current technical indicators of the hub,analysis of accident black spots,and traffic volume prediction.The one-way two-lane ramps are designed as one-way three lane mainline and one-way three-lane ramps respectively.The differences between the two design methods in terms of traffic volume configuration,horizontal and vertical indicators,lanes with variable speed and transition section lengths are analyzed.The advantages and disadvantages of the two design methods are described in combination with scheme comparison and traffic capacity analysis of diversion area,and a conclusion is drawn that the use of three-lane mainline exits is more appropriate.The results of safety evaluation combined with simulation analysis show that the design of three lane main line exit is feasible without relevant provisions in the specification.

关 键 词：枢纽改扩建 三车道匝道 交通量配置 分流区通行能力 

分 类 号：U412.38[交通运输工程—道路与铁道工程]