既有省道平交改造为立交的相关问题研究及探讨

Research and Discussion on Related Issues of Reconstructing Existing Provincial Highways at Grade into Overpasses for S205 Wengmen Interchange

摘要:

国省道公路在原有道路的基础上进行升级改造，往往出现规范规定的技术指标与地方实际需求相冲突、大型交叉口的通行能力提升需求与沿线影响因素相冲突等情况。S205瓮门互通改造工程是湖北省第一座在省道升级改造中在原平交基础上新建的全互通式立交，以该工程为例，针对以上问题，研究解决思路。在设计过程中通过多因素综合法，结合项目背景条件、功能、地位作用、沿线制约因素等方面，对3个方案进行了综合比选论证，并确定了最终方案。对于在不封闭的一级公路上设置互通，如何满足车辆的通行安全和非机动车、行人的通行需求，如何避免非机动车辆和行人闯入互通区等交通组织难题，给出了解决问题的主要思路和措施要点。

Abstract:

The national and provincial highways are upgraded and reconstructed on the basis of the original roads. However, there are often conflicts between the technical indicators stipulated by the regulations and the actual local needs, and between the demand for the improvement of traffic capacity of large intersections and the influencing factors along the route. The S205 Wengmen Interchange Reconstruction Project is the first fully interconnected interchange newly built in Hubei Province in the provincial highway upgrading reconstruction on the basis of the original grade crossing. Taking this project as an example, aiming at the above issues, the solution ideas are studied. In the design process, through the multiple factor synthesis method, combined with the project background conditions， functions, status and roles, constraints along the route and other aspects, three schemes are comprehensively compared and demonstrated to determine the final scheme. For constructing the interchanges on the unclosed first-class highway, how to satisfy the traffic safety of vehicles and the traffic demand of non-motor vehicles and pedestrians, and how to avoid the traffic organization problems such as non-motor vehicles and pedestrians intruding into interconnecting areas, the main ideas and measure essentials for solving the problems are given.