双层立体复合高速公路与两条相邻城市道路互通立交改扩建方案设计

Design of Interchange Reconstruction and Expansion Scheme

摘要:

深圳机荷高速公路改扩建工程是国内首例双层立体复合高速公路改扩建项目，现状高速沿线立交众多，须对其改扩建方案进行研究设计。对机荷高速公路进行了现状分析，并对其交通量进行了预测。在主线改扩建为双层立体复合高速公路的总体方案下，结合沿线各立交的交通功能、交通量及周边条件，对机荷高速与两条相邻城市道路互通立交改扩建方案进行了设计和比选，并确定了推荐方案。经仿真评估，推荐方案立交整体服务水平良好，交通运行顺畅，两条相邻道路均满足远景年交通量需求，且交通压力得以缓解。

Abstract:

The reconstruction and extension project of Shenzhen Jihe Expressway is the first proeject of double-layer three-dimensional composite expressway in China. As there are many interchanges along the expressway, it is necessary to study and design its reconstruction and expansion scheme. In this paper, the present situation of the expressway is analyzed and the traffic volume is forecasted. Under the overall scheme of rebuilding and expanding the main line into a double-layer three-dimensional composite expressway, and combined with the traffic function, traffic volume and surrounding conditions along the line, it is compared and contrasted in this paper of the design scheme of rebuilding and expanding the interchanges between Jihe Expressway and two adjacent urban roads. The recommended scheme is thus determined. Through simulation and evaluation, it is found that the overall service level of the proposed interchange is good, the traffic operation is smooth and the two adjacent roads meet the annual traffic demand in the long term. Therefore, the traffic pressure is relieved.