喇叭形互通式立交合理规模控制研究

发布时间：2018-03-02 02:06

本文关键词： 喇叭形互通式立交占地面积匝道圆曲线半径通行能力服务水平 VISSIM 交通仿真　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着我国高速公路网逐渐形成，路网的节点必然要修建互通式立交。目前有部分立交追求规模大、设计速度高、设计线形指标高，导致立交工程投资和占地面积过大。由于我国人口多，土地资源有限。如何既能有效的降低立交规模，又能满足未来交通量需求，是本文研究论述的问题。本文以喇叭形互通式立交为研究对象，用立交占地面积表示立交规模。分析了影响立交规模的因素，包括立交的地理位置、被交路与主线的交角、匝道的圆曲线半径、纵断面的设计、视距的影响、超高与设计速度、超高与圆曲线半径的关系等。重点分析了匝道圆曲线半径对立交规模的影响，并建立匝道圆曲线半径与立交用地规模计算模型。基于立交匝道的设计必须满足期望的通行能力和服务水平，在合理控制立交规模的同时必须要考虑交通工程因素，通过对立交的交通流特性分析，基于通行能力的计算模型、服务水平的分级，得出了不同通行能力、不同服务水平的立交规模推荐值。参考《公路路线设计规范》服务水平等级的划分，以交通流密度为评价指标，对龙门立交工程实例的大、中、小三种规模的方案进行分析，以目标服务水平为标准，利用VISSIM仿真评价，验证基于服务水平的立交规模推荐值的适用性。本文将喇叭形互通式立交的规模与服务水平相联系，得出基于服务水平的立交规模推荐值，设计人员根据预测交通量，指定目标服务水平，可以合理选取匝道线形指标，控制立交规模，这对于山区地形受限时，，避免大填大挖、破坏生态，具有重要意义。
[Abstract]:With the gradual formation of the highway network in China, the nodes of the road network must build interchanges. At present, some of the interchanges are in pursuit of large scale, high design speed and high design linear index. Because of the large population and limited land resources, how to reduce the scale of interchange and meet the demand of traffic volume in the future is the problem discussed in this paper. In this paper, the loudspeaker interchange is taken as the research object, and the scale of the interchange is expressed by the area occupied by the interchange. The factors influencing the scale of the interchange are analyzed, including the geographical position of the interchange, the intersection angle between the intersection and the main line, and the radius of the circle curve of the ramp. The design of longitudinal section, the influence of visual distance, the relationship between super-high and design speed, between super-high and radius of circular curve, etc. The influence of the radius of ramp circle curve on the scale of interchange is analyzed emphatically, and the calculation model of radius of circle curve of ramp and the scale of interchange land is established. Based on the design of interchange ramp, the expected capacity and service level must be satisfied, the traffic engineering factors must be considered while the scale of interchange is reasonably controlled, and the calculation model based on traffic capacity is obtained by analyzing the traffic flow characteristics of the interchange. The grade of service level, obtained different capacity, different service level of interchange scale recommended value. Referring to the classification of service level grade of Highway Route Design Code, taking traffic flow density as evaluation index, this paper analyzes the large, middle and small scale schemes of Longmen Interchange project, and takes the target service level as the standard. By using VISSIM simulation evaluation, the applicability of the recommended value of interchange scale based on service level is verified. In this paper, the scale of loudspeaker interchange is connected with the service level, and the recommended value of the interchange scale based on service level is obtained. According to the forecast traffic volume and the target service level, the designer can reasonably select the ramp alignment index. Controlling the scale of interchange is of great significance to avoid large fill and dig and destroy ecology when terrain is limited in mountainous area.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U412.352.1

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