摘要 隧道出入口由于其特殊性，对行车安全有着明显的影响，其中出入口道路线形对行车安全有明显的影响。基于此背景，本文针对隧道出入口的线形安全性进行选题和开展研究。 本文依托沪蓉西“基于运营安全的路线指标运用研究”和西部项目“隧道出入口运行安全研究”，以隧道出入口的线形安全性评价为研究对象，以速度、加速度为研究手段，以指导线形设计为目标，对隧道出入口的线形的安全性评价指标、标准及方法进行深入的探讨，并将结果应用于湖蓉西高速公路工程实践重。 首先，提出了反应隧道出入口线形特征的线形指标，并对隧道出入口内外线形的差异性进行了分析，提出了线形连续性指标的概念。 其次，提出适用于隧道出入口的线形安全性评价指标、标准和方法。评价指标包括车速差、加速度；针对隧道出入口的特殊性建立了适合于隧道出入口线形的评价标准。 再次，对线形连续性指标与车速差及加速度的关系进行了回归分析，基于车速差与加速度的评价标准，提出了隧道出入口线形的设计要求。并提出了应用车速差及加速度评价隧道出入口线形安全性的方法。 最后，将研究结果应用于湖蓉西高速公路实际工程，并对进一步的研究方向做了简要的说明。 关键词：隧道出入口，线形，安全性，评价指标，评价方法，评价标准。 ABSTRACT Alignment at tunnel threshold and exit, has special impacts on traffic safety, so have obvious impacts on traffic safety. The alignment at tunnel threshold and exit will be researched. The alignment at tunnel threshold and exit will be researched based on the programs: “The Using of Road Alignment Based on Traffic Safety” and “The Safety Research of Tunnel Threshold and Exit”. Appraising indices such as speed and acceleration will be used. The paper aim at guiding alignment design, doing research on evaluating appraising indices and criterions. At last, production will be used on HuRongXi freeway. Firstly, the traffic performance and the model of acceleration were surveyed. Second, the indices and criterions of evaluating the safety of alignment at tunnel threshold and exit were moved. The appraising indices include speed and acceleration; criterions was moved to evaluating safety of alignment at at tunnel threshold and exit. The methods of evaluating safety of alignment at tunnel threshold and exit were moved. The transition index was moved after analyzed the discrepancy of alignment outside and inside the tunnel, and the relationship of transition index and speed difference was analyzed. The design criterion was moved based on the appraising indices of speed and acceleration. At last, the production was used at HuRongXi freeway, the farther problem was moved simply. |
硕士论文