五路交叉的上隍互通立交方案设计

Schematic Design of Shanghuang Interchange at Five-Road Crossing

上隍互通是镇江市两条快速路、一条交通性主干路和镇江扬州两市城际型快速通道相交的关键互通节点。针对该立交节点,存在多路交叉、慢行交通组织和跨铁路及其货场等诸多限制条件。基于相交道路的功能定位和交通需求,提出了两个互通比选方案。研究探索了复杂控制条件下,多路立交分解组合再优化的设计思路,提出首先将五路交叉分解成三个常规立交,分别进行全互通设计;然后叠加组合各象限匝道;最后再根据限制条件、组合互通降维、次要交通限制等因素,优化转换匝道的数量和规模。研究对多路立交节点的规划设计具有一定的参考价值。

Shanghuang interchange is a key intersection node connecting two expressways in Zhenjiang City,a traffic main road and an intercity expressway between Zhenjiang and Yangzhou.In view of the existence of many restrictions such as multi-way intersection,slow traffic organization,cross-railway and its freight yard,etc.,this paper proposes two comparison schemes based on the functional positioning and traffic demand of roads.This research explores the design idea of multi-way interchange decomposition and combination re-optimization under complex control conditions,and proposes to decompose the five-way interchange into three standard interchanges for full intercommunication design respectively.And then superimpose the ramps in each quadrant.Finally according to factors such as constraints,dimensionality reduction design between two intersections and secondary traffic restrictions to optimize the number and scale of transition ramps.The research has certain reference value for the planning and design at multi-way interchange nodes.