城市高架快速路“先入后出”匝道的布置研究与应用  

Study on Layout of “First-in and Then-out” Ramp in Urban Elevated Expressway

作　　者：李敏[1] 

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海市200092

出　　处：《城市道桥与防洪》2016年第7期53-55,71,共4页Urban Roads Bridges & Flood Control

摘　　要：城市高架快速路"先入后出"式出入口,是影响快速路主线通行能力的主要因素。在工程实践中,为便捷衔接地面道路网络,一般将上下匝道设置在主要交叉口处,将导致高架道路出入口交织段较短、出入车流严重影响主线交通等问题。针对这些问题,现分别针对常规布置方法、辅助车道布置方法、集散车道布置方法、"剪刀叉"布置方法的优缺点及适用性进行分析,以期用合理的代价减少高架道路交织影响。接着,以石家庄市和平路高架快速路工程设计为例,对不同匝道布置方案进行分析,得出:对于该工程采用设置"剪刀叉"的匝道布置方案交通运行及工程代价等方面综合考虑较优。该匝道布置方案为高架快速路出入口间距无法满足规范要求且周边地块交通集散有需求的情况下,创造了设置匝道的有利条件。The 'first-in and then-out' passages of urban elevated expressway are the main factor influencing the traffic capacity of the main line in expressway. In order to link up with the ground road network in the engineering practices, the upper and lower ramps are generally arranged at the main intersections, which leads to the problems of the shorter weaving section at the passages of elevated expressway, and the in and out vehicle flows seriously influencing the traffic of the main line. Aiming at these problems, the article analyzes the advantages, disadvantages and applicability of the conventional layout method, the auxiliary lane layout method, collection and distribution lane layout method, and the'scissors ramp'layout method so as to use the reasonable expense to decrease the weaving influence of elevated expressway. Taking the design of Shijiazhuang Heping Road Elevated Expressway Project as an example, the article analyzes the different ramp layout schemes. The result shows that the traffic operation and engineering cost of this project by the 'scissors ramp'layout scheme are comprehensively considered better. This ramp layout scheme creates the advantage of ramp layout for the passage spacing of elevated expressway hard to satisfy the standard requirement and the needs of traffic collection and distribution in the surrounding areas.

关 键 词：高架快速路 出入口匝道 辅助车道 集散车道 剪刀叉匝道 运行评价 

分 类 号：U412.352.12[交通运输工程—道路与铁道工程]