相邻隧道与互通安全分析和合理间距研究

发布时间：2018-05-24 07:36

本文选题：隧道 + 立交　；参考：《重庆交通大学》2014年硕士论文

【摘要】：立交和隧道都是高速公路的重要组成结构物。随着高速公路的发展，受山区地形地貌限制和沿线社会经济发展需求影响，高速公路中隧道与立交的比例大幅度提升，已经出现了隧道与互通立交之间间距较小的特殊路段，导致高速公路的拥堵和交通事故，严重影响了高速公路运营安全。为了提高高速公路的安全性和营运效益，本文对隧道与立交连接段的影响因素着手分析，利用数学方法从宏观和微观的交通理论研究高速公路隧道与立交的最小间距。首先在分析相关标准规范规定和国内外研究成果，在明确隧道与立交连接段构造的基础上，将隧道与立交之间的距离划分为立交转换区、隧道过渡区两部分，确定隧道与立交连接段的影响因素。影响因素包括：交通需求、连接段的几何布置及分、合流区的交通流特征、车辆行驶速度、驾驶舒适性要求、交通指示标志的布置、隧道出入洞口的明暗适应这六个方面。将宏观的交通理论和微观的交通冲突技术相结合，研究了立交转换区合理长度。由于立交入口和出口的行车特征不同，利用车道变换理论对立交入口转换区和立交出口转换区分别进行分析，并通过数学方法加以描述，建立了立交入口转换区长度计算模型和立交出口转换区长度计算模型。基于交通冲突技术，以仿真软件VISSIM为建模工具，选取评价指标并构建立交转换区的安全评价体系，确定了满足目标安全等级的立交转换区最小长度。通过比较长度模型的计算值和安全评价模型的推荐值，进而确定立交出入口转换区长度的最小值。进行了隧道进出口运行速度的试验研究，分析寻找出隧道出入口速度变化与车辆行驶位置的关系，确定了隧道出入口过渡段的最小长度。最后结合立交转换区的最小长度，，确定了隧道与立交的最小间距值。论文的研究为系统地解决小间距隧道与立交的设计问题提供了有力的理论指导与参考，并对现有规范有关隧道与立交间距的规定进行技术更新提供了新方法、新思路，具有一定的现实意义。
[Abstract]:Interchange and tunnel are important structures of highway. With the development of expressway, influenced by the limitation of terrain and geomorphology in mountainous area and the demand of social and economic development along the highway, the proportion of tunnel and interchange in expressway has been greatly increased, and there has been a special section of highway with small spacing between tunnel and interchange. Leading to highway congestion and traffic accidents, seriously affected the safety of highway operation. In order to improve the safety and operation benefit of freeway, this paper analyzes the influence factors of the connecting section between tunnel and interchange, and studies the minimum distance between tunnel and interchange by mathematical method from macroscopic and microscopic traffic theory. First of all, based on the analysis of the relevant standards and regulations and the domestic and foreign research results, the distance between the tunnel and the interchange is divided into two parts: the transition zone and the transition zone of the tunnel, on the basis of defining the structure of the connecting section between the tunnel and the interchange. Determine the influence factors of the connecting section between tunnel and interchange. The influencing factors include: traffic demand, geometric arrangement and division of connecting section, traffic flow characteristics in confluence area, vehicle driving speed, driving comfort requirement, layout of traffic indication signs, light and dark adaptation of tunnel entrance and exit. Combining macro traffic theory with micro traffic conflict technology, the reasonable length of interchange transition area is studied. Because of the different driving characteristics of the entrance and exit of the interchange, the transition area of the entrance and exit of the interchange is analyzed by using the theory of lane change, and the mathematical method is used to describe it. The calculation model of the length of the transition zone at the entrance of the interchange and the length of the transition zone at the exit of the interchange are established. Based on the traffic conflict technology and the simulation software VISSIM as the modeling tool, this paper selects the evaluation index and constructs the security evaluation system of the interchange transition area, and determines the minimum length of the interchange transition area that meets the target security level. By comparing the calculated value of the length model with the recommended value of the safety evaluation model, the minimum length of the transition area of the interchange entrance and exit is determined. In this paper, the experimental study of tunnel inlet and exit speed is carried out, and the relationship between the change of tunnel inlet speed and the vehicle driving position is found out, and the minimum length of the tunnel entrance and exit transition section is determined. Finally, the minimum distance between the tunnel and the interchange is determined according to the minimum length of the transition zone. The research in this paper provides a powerful theoretical guidance and reference for solving the design problem of small spacing tunnels and interchanges, and provides a new method and new idea for the technical renewal of the existing regulations concerning the spacing between tunnels and interchanges. Has certain realistic significance.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U412.366

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